Question Anyone tried to flash XQ-BC72 with XQ-BC62 (US Version) firmware? - Sony Xperia 1 III

Just got my Xperia 1 III (XQ-BC72) couple days ago, flashed SEA firmware with no problems so far. Except too bad it doesn't support Volte in Canada, which used to be fine on my previous Xperia 1 J9110 with SEA firmware as well.
I was wandering is that possible to flash it with US firmware to unlock that, plus features like more 5G bands support?
Anything helpful would be appreciated.

i7killpii said:
Just got my Xperia 1 III (XQ-BC72) couple days ago, flashed SEA firmware with no problems so far. Except too bad it doesn't support Volte in Canada, which used to be fine on my previous Xperia 1 J9110 with SEA firmware as well.
I was wandering is that possible to flash it with US firmware to unlock that, plus features like more 5G bands support?
Anything helpful would be appreciated.
Click to expand...
Click to collapse
Hi, any updates on this? I have an XQ-BC72 coming, and if I can get USA firmware on it I am hoping it will work for me.
Question for you: how did you flash the SEA firmware? Official Sony tools / firmware upgrade?

i7killpii said:
Just got my Xperia 1 III (XQ-BC72) couple days ago, flashed SEA firmware with no problems so far. Except too bad it doesn't support Volte in Canada, which used to be fine on my previous Xperia 1 J9110 with SEA firmware as well.
I was wandering is that possible to flash it with US firmware to unlock that, plus features like more 5G bands support?
Anything helpful would be appreciated.
Click to expand...
Click to collapse
charlatan01 said:
Hi, any updates on this? I have an XQ-BC72 coming, and if I can get USA firmware on it I am hoping it will work for me.
Question for you: how did you flash the SEA firmware? Official Sony tools / firmware upgrade?
Click to expand...
Click to collapse
I flashed US firmware yesterday but it appears that it still wont work with Verizon even though all the 4G bands are there. I could care less about 5G where I live. I have CMDA less feature activated too but still no go. Worked fine on the HK version of Xperia 5 II so I though I would be OK on this one as well.
@i7killpii you are unlikely to get VoLTE to work (aside from maybe on T-Mobile). Its possible that a Canadian provider may also allow it but I doubt it. You also wont get access to more bands just by switching firmware. Whatever bands came with the phone is all you have access too.
@charlatan01 you can follow the directions here: https://forum.xda-developers.com/t/guide-flashing-xq-at51-firmware-on-xq-at52-device.4147027/
These are for the Xperia 1 II but its the same process for the 1 III as well. If you use Verizon and somehow figure out to make it work, let me know. Please note, flashing firmware will erase everything. Also I am not responsible for any bricking or issues you may get into. It worked for me on the first try.

I flashed my XQ-BC72 using XQ-BC62 rom before. I cannot afford 5G plan so I didn't try. About VoLTE, I am using Fido and the carrier services are not available (including VoWiFi, VoLTE, showing 4G instead of LTE, etc.). Also I got a lot of problems such as LTE connection disconnection about every 30 seconds. So I flashed it back to TW rom. Still all carrier services are not available but at least the LTE is functioning.
I've searched about the carrier services issues. It seems it's because the carrier isn't cooperating with Google so no carrier configuration is available (I'm not sure because fido has android phones on their website).

morphius88 said:
I flashed US firmware yesterday but it appears that it still wont work with Verizon even though all the 4G bands are there. I could care less about 5G where I live. I have CMDA less feature activated too but still no go. Worked fine on the HK version of Xperia 5 II so I though I would be OK on this one as well.
@i7killpii you are unlikely to get VoLTE to work (aside from maybe on T-Mobile). Its possible that a Canadian provider may also allow it but I doubt it. You also wont get access to more bands just by switching firmware. Whatever bands came with the phone is all you have access too.
@charlatan01 you can follow the directions here: https://forum.xda-developers.com/t/guide-flashing-xq-at51-firmware-on-xq-at52-device.4147027/
These are for the Xperia 1 II but its the same process for the 1 III as well. If you use Verizon and somehow figure out to make it work, let me know. Please note, flashing firmware will erase everything. Also I am not responsible for any bricking or issues you may get into. It worked for me on the first try.
Click to expand...
Click to collapse
Thanks for the follow-up. I managed to cancel my order for the Asia version and am going to snag the NA version when I can.

try only flashing /OEM partition with the OEM files of the firmware from your area.
Usually that brings VoLTE functionality and stuff

charlatan01 said:
Thanks for the follow-up. I managed to cancel my order for the Asia version and am going to snag the NA version when I can.
Click to expand...
Click to collapse
I called Verizon and got them to add the IMEI to my phone line along with CMDA-less feature. It actually worked. I can make phone calls and send/receive texts so it appears its possible to get Verizon to work on Asian model. However, VoLTE is a different story. I dont think I will get that work.

Related

Wifi calling on Xperia Z5 compact

Anyone had any luck enabling it?
carllafoe said:
Anyone had any luck enabling it?
Click to expand...
Click to collapse
Well, isnt it a feature depending on your carrier (firmware)?
Gesendet von meinem E5823 mit Tapatalk
Yes this is carrier specific.
They will supply an app on Play if so.
Works on EE in the UK, it's a menu setting not an app.
Where exactly is the menu setting for wifi calling? I can't seem to find it on mine. If it matters, I got the Taiwan version of the phone and am with MetroPCS in the States.
For me it's in settings, under device, call. UK EE.
I am on EE and purchased my phone from Handtek hence preloaded with European Generic Stock firmware.
I can only assume @ewans has purchased the device from EE directly, which would have the EE branded Stock firmware which would have that setting built in by the carrier/EE.
I read when researching why I hadn't got this WiFi calling setting that carriers would be sending out firmware updates with these new settings (this finding is based on a different phone but the principle of carrier providing the update must be telling.) Looks like Sony stock unbranded firmware excludes this feature.
dillalade said:
I am on EE and purchased my phone from Handtek hence preloaded with European Generic Stock firmware.
I can only assume @ewans has purchased the device from EE directly, which would have the EE stock firmware which would have that setting.
I read when researching why o hadn't got this WiFi calling setting and that carriers would be sending.out firmware updates with these new settings. Looks like Sony stock unbranded firmware excludes this feature.
Click to expand...
Click to collapse
Yes, directly from EE.
Guess this confirms it (image attached.)
You require a carrier stock Sony firmware to obtain the feature.
If desperate for native WiFi calling with your carrier then you would need to update your Sony firmware to run your carriers version of it.
As long as your carrier supports WiFi calling and has the z5c officially supported like EE has then you will source the carrier firmware in xperiafirm.
The sacrifice clearly will be the added bloatware you will get with a carrier branded stock firmware.
Yep. I figured out that this was a carrier feature on my own probably around the time you mentioned it here. That sucks, cause my carrier, MetroPCS, has wi-fi calling available, but are highly unlikely to carry the Z5. Dang.
An alternative if you're in the US is to install Google Hangouts Dialer and get a Google Voice number. I switched from Verizon to T-Mobile here in the states, so I just ported my old Verizon number to Google Voice for a one time, $20 fee. With Hangouts Dialer, calls to US numbers are free, and if you're on Wifi, you can receive calls using your Google Voice number.
dillalade said:
Guess this confirms it (image attached.)
You require a carrier stock Sony firmware to obtain the feature.
If desperate for native WiFi calling with your carrier then you would need to update your Sony firmware to run your carriers version of it.
As long as your carrier supports WiFi calling and has the z5c officially supported like EE has then you will source the carrier firmware in xperiafirm.
The sacrifice clearly will be the added bloatware you will get with a carrier branded stock firmware.
Click to expand...
Click to collapse
That picture displays a "T-Mobile" option. That makes me think that there is a chance wifi calling works on the T-Mobile network. Can anyone confirm this? If so, I will be purchasing this phone ASAP.
T-Mobile's website confirms that they do wi-fi calling. At least here in the States.
Adrift98 said:
T-Mobile's website confirms that they do wi-fi calling. At least here in the States.
Click to expand...
Click to collapse
I know that they have wifi calling but I am 90% sure that this only applies to devices that they sell themselves. (Meaning that unlocked devices such as the Z5C will not have the wifi option). I just find it interesting that the phone itself has an option to select T-Mobile wifi calling if T-Mobile has had no plans to support it. Wouldn't Sony have removed this from the list if it wasn't compatible? Maybe there is hope for the future.
T-Mobile is also a carrier in Europe. The link in the previous screenshot might be referring to the places in Europe that carry the T-Mobile branded z5c. There appears to be a version of the firmware that is for T-Mobile on Xperifirm:
Maybe someone in the US on T-Mobile can try that out and see if there is wifi calling enabled? I am on the .32 firmware and don't want to revert back.
I flashed to T-Mobile Austria, and no luck on the wi-fi calling feature. Doesn't show up on the menu it should.
Hello, I'm on ee new phone but despite carrier saying they have activated and recent update I don't have this option. Those that do, are there Sip settings if so can you share them
EE Stock Firmware
I know this is counter intuitive to most on here but i want to go back to EE firmware.
I work in a Low reception office so WiFi calling had been a dream come true rather than running around the office trying to find signal. I also live in a 4G+ area which was also wonderful so I would like to get both back (broke phone and insurance have sent me an unbranded one with Stock firmware) so does anyone know where I can get the Stock EE Firmware I can flash via Sony's Flashtool?
I've searched google for 2 days and all I can find it posts and discussions on the newest stock update and/or rooting neither of which I want.
Thanks in advance.
G3001 said:
I know this is counter intuitive to most on here but i want to go back to EE firmware.
I work in a Low reception office so WiFi calling had been a dream come true rather than running around the office trying to find signal. I also live in a 4G+ area which was also wonderful so I would like to get both back (broke phone and insurance have sent me an unbranded one with Stock firmware) so does anyone know where I can get the Stock EE Firmware I can flash via Sony's Flashtool?
I've searched google for 2 days and all I can find it posts and discussions on the newest stock update and/or rooting neither of which I want.
Thanks in advance.
Click to expand...
Click to collapse
This is something I am very much interested in as well, for similar reasons. I wondered if you made any progress on working out a process.

Question SIM 1 refusing to use 3G (no VoLTE available)

Had the phone a week and was connected to Vodafone AU, connects to 4G but no VoLTE so it drops to 3G when making/receiving calls.
Yesterday it started to refuse to drop to 3G for calls and remained on 4G, internet on 4G was working fine, but because it refused to drop to 3G I was not having any luck with calls, manually trying to force it on 3G just ended up with no reception and no connection. Did a whole bunch of trouble shooting and reset network settings, even factory reset the phone and tried a different SIM from another provider, no luck... same issue, will not drop to 3G for making/receiving calls.
Once I used sim SLOT 2, everything was back to normal, I could manually force it on 3G, when making calls it will go from 4G to 3G as before and all is well.
Is the phone faulty and I need to get it replaced? is there something I can do to get sim SLOT 1 back working again?
It's really a problem where you need to just try and see if you find a fix.
If your provider offer no VoLTE try to do a software repair, no factory reset from inside the phone but a software repair with xperia companion. that will not reset the software on your phone but will download a new copy of the firmware (same then make a firmware reset with itunes and recovery mode compared to factory reset from iOS on iphone)
Evil_Sephiroth said:
It's really a problem where you need to just try and see if you find a fix.
If your provider offer no VoLTE try to do a software repair, no factory reset from inside the phone but a software repair with xperia companion. that will not reset the software on your phone but will download a new copy of the firmware (same then make a firmware reset with itunes and recovery mode compared to factory reset from iOS on iphone)
Click to expand...
Click to collapse
Thanks, will try with Xperia companion and see if it fixes to he problem.
I have the Xperia 1 II and flashed SEA firmware and Volte works flawlessly.
If you can be bothered flash SEA firmware to see if it works
Root & enable VoLTE
Hazzay88 said:
I have the Xperia 1 II and flashed SEA firmware and Volte works flawlessly.
If you can be bothered flash SEA firmware to see if it works
Click to expand...
Click to collapse
I've seen a few people mention the X1 ii can get VoLTE after flashing another region. Sadly no one with a X1 iii in AUS has confirmed they are able to get it working with any reflashed ROMs.
FYI my original issue with the 3G was resolved by doing a firmware repair using the Xperia companion.
mutilor said:
I've seen a few people mention the X1 ii can get VoLTE after flashing another region. Sadly no one with a X1 iii in AUS has confirmed they are able to get it working with any reflashed ROMs.
FYI my original issue with the 3G was resolved by doing a firmware repair using the Xperia companion.
Click to expand...
Click to collapse
Ohh good the problem was resolved with a software repair. However with Optus network 3G will be turned off April 2022 which I think in that situation anyone using the Xperia on Optus network with no volte wouldn't be able to place calls.
Hazzay88 said:
Ohh good the problem was resolved with a software repair. However with Optus network 3G will be turned off April 2022 which I think in that situation anyone using the Xperia on Optus network with no volte wouldn't be able to place calls.
Click to expand...
Click to collapse
Yeah I heard the same.
Glad i'm with Vodafone AU as they have said no plans yet to turn off 3G since they have so many customers still using.
mutilor said:
Yeah I heard the same.
Glad i'm with Vodafone AU as they have said no plans yet to turn off 3G since they have so many customers still using.
Click to expand...
Click to collapse
I hope someone can verify by flashing SEA firmware if volte will work for you.
I only flashed SEA firmware for faster updates which also resulted in volte working.
It made the phone a better experience overall
Hazzay88 said:
I hope someone can verify by flashing SEA firmware if volte will work for you.
I only flashed SEA firmware for faster updates which also resulted in volte working.
It made the phone a better experience overall
Click to expand...
Click to collapse
1 How can i tell what ROM i have (SEA,US,RU,HK etc)
2 I read in another forum that flashing non native ROM will cause OTA updates to fail and I would need to manually update via Xperia Companion (this is all for Xperia 1 iii)
mutilor said:
1 How can i tell what ROM i have (SEA,US,RU,HK etc)
2 I read in another forum that flashing non native ROM will cause OTA updates to fail and I would need to manually update via Xperia Companion (this is all for Xperia 1 iii)
Click to expand...
Click to collapse
I can't remember off the top of my head where to check Firmware region however you should be able to Google it.
I have flashed mine close to year ago and have received every update since. OTA works flawless.
I don't know about the Xperia 1 III though
With the xperia 1 iii, if you flash different region it will not allow OTA. I use flasher to flash update manually and for me it's fine as I'm using SEA also for VOLTE.
Wooow that's interesting that it doesn't do OTA updates as don't see what the issue is. I flashed firmware on phone and after that didn't really have to do anything as updates came through OTA.
Now I'm hesitant in getting the Xperia 1 IV as it may not work if flashed. It's a gamble to get volte to work. Also I much prefer OTA updates.
Might consider S22 Ultra if it checks out good. Sony has to do something exceptional for me to consider it. Fix screen brightness, fix battery life, fix volte, fix WiFi calling etc.
spine6 said:
With the xperia 1 iii, if you flash different region it will not allow OTA. I use flasher to flash update manually and for me it's fine as I'm using SEA also for VOLTE.
Click to expand...
Click to collapse
What country and carrier are you on?
mutilor said:
What country and carrier are you on?
Click to expand...
Click to collapse
I'm in malaysia, tried hotlink,celcom all working with VOLTE
spine6 said:
I'm in malaysia, tried hotlink,celcom all working with VOLTE
Click to expand...
Click to collapse
ahh nice
No such luck here in Australia
spine6 said:
I'm in malaysia, tried hotlink,celcom all working with VOLTE
Click to expand...
Click to collapse
Ohh that's so good. I think it's the modem configuration allows it to work in Malaysia
mutilor said:
ahh nice
No such luck here in Australia
Click to expand...
Click to collapse
Have you come across anyone anyone that got it to work in Australia
Hazzay88 said:
Have you come across anyone anyone that got it to work in Australia
Click to expand...
Click to collapse
Nope!
I just created a post today asking this question.
Hazzay88 said:
Ohh that's so good. I think it's the modem configuration allows it to work in Malaysia
Click to expand...
Click to collapse
All asian version have the same bands, it only differs on the config. Since malaysia local xperia are SEA, then just flash the firmware then it will work. If xperia is not available locally, it will not be supported unless you root your phone and enable it.

Question [SOLVED] Flashing XQ-BC62 (US) with XQ-BC42 (JP), mobile radio disabled

I was able to flash my XQ-BC62 (US) model with the XQ-BC42 (JP) firmware using newflasher. Everything seems to work OK except the mobile radio. The radio is completely disabled (as reported by *#*#4636#*#* status screens), not just unable to connect. The hardware is still fine since flashing back to XQ-BC62 firmware gets a signal again.
Unfortunately I need to use XQ-BC42 as the other firmware images are missing the VoLTE support for my JP carrier and it fails to provision. At best I can force it into data only mode by setting radio to LTE only. The carrier does not support 3G at all.
Extra steps I tried:
- Perform factory reset after flashing
- Swap out the files for the modem firmware from the US firmware and reflash
Has anyone had luck with this, or are there any additional steps I might need to try?
This phone keeps getting worse. I literally bought it to use in the US and Japan. Sony support said it is officially unsupported by all US telcos. No SA 5G, no VoNR, no VoWiFi. Now I hear that it doesn't work in Japan?!
I already know it's close to useless in French Polynesia despite having all the right radio bands.
You can try swapping both OEM-xxx.sin files from the XQ-BC42 firmware folder into the XQ-BC62 firmware folder and flash there XQ-BC62 firmware with that, then you should be able to get VoLTE and modem working at the same time.
If that doesn't work, there are other methods but they will require root access.
kevinmcmurtrie said:
This phone keeps getting worse. I literally bought it to use in the US and Japan. Sony support said it is officially unsupported by all US telcos. No SA 5G, no VoNR, no VoWiFi. Now I hear that it doesn't work in Japan?!
I already know it's close to useless in French Polynesia despite having all the right radio bands.
Click to expand...
Click to collapse
Might you elabortate a bit on this?
So which modell? which provider? comeing form a country where all of these 5G related features are just in development this would be nice to get some further informations on this topic.
VoWiFi is highly likely a provider "problem" - as we have another thread here where these "offical support" statements are at least highly questionable, as we have multiple users here using VoWiFi.
Here is one example of an answer one got from sony
T-Mobile USA Volte and VoWifi support?
Hey XDA, is USA model XQBC62 work with T-Mobile Volte and VoWifi? PS: my old Xperia5 II wasnt able to work and returned back to Sony week later (sad)
forum.xda-developers.com
What is not working in French Polynesia?
Which carrier are you talking about? using a second sim card or use roaming capabilites? keep in mind that not all providers might allow access to all availeable networks based on there roaming contracts. just to give you a idea check these information from one of the providers over ther
https://www.vini.pf/sites/default/files/docs/liste_partenaires_vini-roaming_dec17.pdf
I took my device through several countries already not one having trouble with connectivity as long as the bands are supported and there.
On my trips to japan i head several different devices with me over the yeras, beside the xperia, not once having problems as long as the bands where supported / one is using a local sim - card.
cjmovie said:
Unfortunately I need to use XQ-BC42 as the other firmware images are missing the VoLTE support for my JP carrier and it fails to provision. At best I can force it into data only mode by setting radio to LTE only. The carrier does not support 3G at all.
Click to expand...
Click to collapse
Did you try to get in contact with the japanese carrier asking if they are supporting VoLTE for devices from other markets?
Maybe the easiest way would to switch your carrier at all.
If you are willing to dig around more you could try something like this
5II/1&5III VoLTE patch. [Guide to release the root]
In the Xperia user group in cafe.naver.com/x1smart I'm HTCMAGE. Last year, Xperia 1II. How to activate VoLTE. After the guide version...
forum.xda-developers.com
But you will need the profiles for your vendor. One could play around and try to integrate these profiles into your XQ-BC62 Firmware and see if this would work out. But well - keep fingers crossed that you don't brick anything.
OhayouBaka said:
You can try swapping both OEM-xxx.sin files from the XQ-BC42 firmware folder into the XQ-BC62 firmware folder and flash there XQ-BC62 firmware with that, then you should be able to get VoLTE and modem working at the same time.
If that doesn't work, there are other methods but they will require root access.
Click to expand...
Click to collapse
I'll give this a try and report back. Thanks!
Hudrator said:
Did you try to get in contact with the japanese carrier asking if they are supporting VoLTE for devices from other markets?
Maybe the easiest way would to switch your carrier at all.
Click to expand...
Click to collapse
No, they don't support overseas models. I don't know if it's ignorance around the security or an attempt to prop up their own phone sales. Both are honestly believable over here.
This is the only reasonably priced major carrier plan with unlimited international roaming included (ahamo from NTT Docomo). Not being able to use the 1 iii sucks but I'll just write the 1 iii off if it can't be fixed and continue using my JP variant 1 ii.
cjmovie said:
I'll give this a try and report back. Thanks!
No, they don't support overseas models. I don't know if it's ignorance around the security or an attempt to prop up their own phone sales. Both are honestly believable over here.
This is the only reasonably priced major carrier plan with unlimited international roaming included (ahamo from NTT Docomo). Not being able to use the 1 iii sucks but I'll just write the 1 iii off if it can't be fixed and continue using my JP variant 1 ii.
Click to expand...
Click to collapse
sad to hear - but just out of curiosity:
Why did you get yourself the "American" Variant? Docomo has, as well as softbank, there own supported devices. Kind of similar to TMobile US. Sounds you are spending most of the time in japan. I know that the Docomo version isn't so well supported regarding updates though ...
Hudrator said:
Might you elabortate a bit on this?
So which modell? which provider? comeing form a country where all of these 5G related features are just in development this would be nice to get some further informations on this topic.
VoWiFi is highly likely a provider "problem" - as we have another thread here where these "offical support" statements are at least highly questionable, as we have multiple users here using VoWiFi.
Here is one example of an answer one got from sony
T-Mobile USA Volte and VoWifi support?
Hey XDA, is USA model XQBC62 work with T-Mobile Volte and VoWifi? PS: my old Xperia5 II wasnt able to work and returned back to Sony week later (sad)
forum.xda-developers.com
What is not working in French Polynesia?
Which carrier are you talking about? using a second sim card or use roaming capabilites? keep in mind that not all providers might allow access to all availeable networks based on there roaming contracts. just to give you a idea check these information from one of the providers over ther
https://www.vini.pf/sites/default/files/docs/liste_partenaires_vini-roaming_dec17.pdf
I took my device through several countries already not one having trouble with connectivity as long as the bands are supported and there.
On my trips to japan i head several different devices with me over the yeras, beside the xperia, not once having problems as long as the bands where supported / one is using a local sim - card.
Did you try to get in contact with the japanese carrier asking if they are supporting VoLTE for devices from other markets?
Maybe the easiest way would to switch your carrier at all.
If you are willing to dig around more you could try something like this
5II/1&5III VoLTE patch. [Guide to release the root]
In the Xperia user group in cafe.naver.com/x1smart I'm HTCMAGE. Last year, Xperia 1II. How to activate VoLTE. After the guide version...
forum.xda-developers.com
But you will need the profiles for your vendor. One could play around and try to integrate these profiles into your XQ-BC62 Firmware and see if this would work out. But well - keep fingers crossed that you don't brick anything.
Click to expand...
Click to collapse
I have the US model - the same as this thread topic.
It's Sony tech support themselves that told me that there is no carrier support for the US model in the US. It was such an incredible conversation that I saved it. An excerpt:
(Adrian) said :I'm asking you this because at this moment Verizon is currently the only U.S. carrier that supports 5G on the Xperia PRO model. The 5G network service is
not currently available in the Xperia 1 III model and this is why you're getting that
issue. In this particular case we recommend you to check with your phone carrier
if there is a way for them either to provide a different network service or if there is
a work around on their system for you to use your Xperia phone with their service
Click to expand...
Click to collapse
Don't repeat Sony's claim about 5G being in development. T-Mobile has been running SA 5G where I live for nearly 2 years. I've done side-by-side comparisons between an older phone with SA 5G and my Xperia by swapping the SIM. The XPeria has a lot of "no service" problems because it's using SA 5G channel aggregations without having SA 5G. There's another thread on this - Sony has explicitly disabled SA 5G on all US NR bands. https://cacombos.com/device/XQ-BC62
The Sony phone was unstable roaming in PF and could not see several 3G, LTE, and 5G bands that were available to it. Again, an older phone worked better. I used a much more modern coverage map than your 2017 document.
I haven't been to Japan with this my Xperia yet due to COVID restrictions, but I normally spend ~2 weeks a year there. I know my old phone works well there so I'm going to be mad if a new Xperia is stuck looking for old 3G cells that only exist in subways.
I have an XQ-BC42 that I'm using in Europe with 5G working (which isn't supported officially).
All I had to do was flash the XQ-BC42 firmware with the following 3 files replaced by their equivalents from the XQ-BC52 firmware:
* modem_X-FLASH-ALL-4BA8.sin
* modemst1_X-FLASH-ALL-4BA8.sin
* modemst1_X-FLASH-ALL-4BA8.sin
So in your case you just have to take the 3 files above from the XQ-BC42 firmware and combine them with everything else from XQ-BC62 firmware and flash that.
From what I've gathered, assuming your phone has XQ-BC62 firmware on it already, it might only be necessary to flash the XQ-BC42 modem files and nothing else, but I haven't tested this.
I'm assuming you can swap other files too but what definitely didn't work for me was the oem .sin files from another model's firmware. I don't know if there's something incompatible about the XQ-BC42 compared with other models but using non-XQ-BC42 oem .sin files disabled my radio completely.
kevinmcmurtrie said:
I have the US model - the same as this thread topic.
It's Sony tech support themselves that told me that there is no carrier support for the US model in the US. It was such an incredible conversation that I saved it. An excerpt:
Don't repeat Sony's claim about 5G being in development. T-Mobile has been running SA 5G where I live for nearly 2 years. I've done side-by-side comparisons between an older phone with SA 5G and my Xperia by swapping the SIM. The XPeria has a lot of "no service" problems because it's using SA 5G channel aggregations without having SA 5G. There's another thread on this - Sony has explicitly disabled SA 5G on all US NR bands. https://cacombos.com/device/XQ-BC62
The Sony phone was unstable roaming in PF and could not see several 3G, LTE, and 5G bands that were available to it. Again, an older phone worked better. I used a much more modern coverage map than your 2017 document.
I haven't been to Japan with this my Xperia yet due to COVID restrictions, but I normally spend ~2 weeks a year there. I know my old phone works well there so I'm going to be mad if a new Xperia is stuck looking for old 3G cells that only exist in subways.
Click to expand...
Click to collapse
no, i am not saying it is under development. The standards are there. How ever - in different regions some of the 5g is still not rolled out / will never been seen (mmWave,SA 5G - at least for private customers).
Well i read the message you quoted a bit different - and i would love to know what other carriers have to say about that.
I personally would find it completly unlogic to sell a device like the Pro, which is said in your excerpt, to have 5G support on Verizon - but then sell the 5G capable phones which have this deactivated at all.
Supported Major U.S. Carriers: Verizon (5G), T-Mobile (4G), AT&T (4G)*
*As of 9/27/2021, please consult with your network operator to ensure compatibility with their network.
Click to expand...
Click to collapse
Source:
Sony Electronics
electronics.sony.com
Might be, that t-mobile is using some more advanced features. how ever: here where i live most phones up to now don't support 5G SA, at least thats what the carriers say, as there are updates needed to make this work. So we will see here some selected phones using 5G SA - as the providers are working together with SOME of the major OEMs.
You can know ask who is responsible for supporting 5G SA or providing updates... As much as i got from t-mobile usa, they where always not really open to devices, which they don't sell directly ....
Hudrator said:
sad to hear - but just out of curiosity:
Why did you get yourself the "American" Variant? Docomo has, as well as softbank, there own supported devices. Kind of similar to TMobile US. Sounds you are spending most of the time in japan. I know that the Docomo version isn't so well supported regarding updates though ...
Click to expand...
Click to collapse
I happened to be in the US at the time to pre-order and it wasn't clear that Sony would release an unlocked dual-SIM model for the JP market. I checked the radio bands before purchasing but all of this client provisioning stuff is new to me. Seems like all these laws were made to force carriers to unlock their phones / allow any standards compliant phone on their networks, and then they find this loophole with provisioning that requires more than just a SIM card...
OhayouBaka said:
You can try swapping both OEM-xxx.sin files from the XQ-BC42 firmware folder into the XQ-BC62 firmware folder and flash there XQ-BC62 firmware with that, then you should be able to get VoLTE and modem working at the same time.
If that doesn't work, there are other methods but they will require root access.
Click to expand...
Click to collapse
Unfortunately this didn't work. But I did learn that the radio problem isn't an issue with the firmware itself.
Immediately after flashing the mobile radio was OK and I could use it with my alternate SIM card. As soon as I inserted the JP SIM card it triggered OMA client provisioning and killed the radio. After this happened not even the US SIM card would work anymore, and any radio related configurations can no longer be changed.
My hypotheses at this point are either (a) the client provisioning step found something off with my phone and forced it to lock down (not sure if client provisioning has the authority to do this though), (b) the client provisioning is interacting with the modem firmware in a JP-specific way and the US modem firmware is borked by this.
playstation360 said:
I have an XQ-BC42 that I'm using in Europe with 5G working (which isn't supported officially).
All I had to do was flash the XQ-BC42 firmware with the following 3 files replaced by their equivalents from the XQ-BC52 firmware:
* modem_X-FLASH-ALL-4BA8.sin
* modemst1_X-FLASH-ALL-4BA8.sin
* modemst1_X-FLASH-ALL-4BA8.sin
So in your case you just have to take the 3 files above from the XQ-BC42 firmware and combine them with everything else from XQ-BC62 firmware and flash that.
From what I've gathered, assuming your phone has XQ-BC62 firmware on it already, it might only be necessary to flash the XQ-BC42 modem files and nothing else, but I haven't tested this.
I'm assuming you can swap other files too but what definitely didn't work for me was the oem .sin files from another model's firmware. I don't know if there's something incompatible about the XQ-BC42 compared with other models but using non-XQ-BC42 oem .sin files disabled my radio completely.
Click to expand...
Click to collapse
Other than the issue after provisioning the OEM files from the JP model did work for me. If (b) is true then flashing both the oem and modem files might be a solution. I'll give that a try!
playstation360 said:
I have an XQ-BC42 that I'm using in Europe with 5G working (which isn't supported officially).
All I had to do was flash the XQ-BC42 firmware with the following 3 files replaced by their equivalents from the XQ-BC52 firmware:
* modem_X-FLASH-ALL-4BA8.sin
* modemst1_X-FLASH-ALL-4BA8.sin
* modemst1_X-FLASH-ALL-4BA8.sin
So in your case you just have to take the 3 files above from the XQ-BC42 firmware and combine them with everything else from XQ-BC62 firmware and flash that.
From what I've gathered, assuming your phone has XQ-BC62 firmware on it already, it might only be necessary to flash the XQ-BC42 modem files and nothing else, but I haven't tested this.
I'm assuming you can swap other files too but what definitely didn't work for me was the oem .sin files from another model's firmware. I don't know if there's something incompatible about the XQ-BC42 compared with other models but using non-XQ-BC42 oem .sin files disabled my radio completely.
Click to expand...
Click to collapse
cjmovie said:
Other than the issue after provisioning the OEM files from the JP model did work for me. If (b) is true then flashing both the oem and modem files might be a solution. I'll give that a try!
Click to expand...
Click to collapse
Same result, no radio after client provisioning runs and it stays borked even with the SIM card swapped out.
cjmovie said:
Same result, no radio after client provisioning runs and it stays borked even with the SIM card swapped out.
Click to expand...
Click to collapse
Have you tried with only the modem files taken from the XQ-BC42 firmware? Might be worth a shot.
Also, it might be worth asking on the 5ch thread if you speak Japanese.
playstation360 said:
Have you tried with only the modem files taken from the XQ-BC42 firmware? Might be worth a shot.
Also, it might be worth asking on the 5ch thread if you speak Japanese.
Click to expand...
Click to collapse
I spent a few more days trying various combinations of flashing, factory resets, etc. and finally have it working. I don't know if this is the only way to achieve this, but I can share the sequence I did most recently. This was inspired by the discussions in that 5ch thread - thanks for the link!
1. Install JP variant ROM with full factory reset.
2. Install the JP SIM card and wait for provisioning to finish. The radio stops working at this point.
3. Create and flash a hybrid ROM, using the modem*.sin files from the JP variant and everything else from the original (US) variant. Do NOT factory reset.
4. Set the correct APN (sp-mode.net for ドコモ).
After this both the JP and US SIM cards are working.
@cjmovie
Congrats on this achievement! Hope you can now use your device as you wished!

General USA version XQ-CT62 received today!!

I just received my Xperia 1 IV USA version today from FocusCamera.com today, I was a little skeptical if it was even the USA version, since it wasn`t shipping from Sony until next week, I originally had pre-ordered on Sony website, then with a little looking around I had found the USA version on ebay in-stock, then I saw the seller name and went to there website yesterday and verified with there live chat that in fact it was in stock and would ship, so I ordered and use next day air shipping, everything works flawless and actually has the 5G bands like my Pixel 6 Pro, so I can get proper 5g speeds, on Band N71, That was missing from the Global version I was using 2 weeks ago, now I need the Firmware from Sony so I can root. I`m a happy camper
Congratulations
What carrier are you using it on?
daviddem said:
What carrier are you using it on?
Click to expand...
Click to collapse
yeah I had t-mobile then I switched to GoogleFi last month, and wifi calling works perfect, inside my work place service from all carriers suck, since it big steel building, but my Xperia 1 IV will say emergency calls only, but I can receive calls and make calls and receive text, ad everything just like had full bars of carrier service.
I guess you were not able to root it?
To know exactly how capable the device is then its necessary take modem logs and let smart people parse it.
https://cacombos.com/contribute "Qualcomm" section for Sonys.
VeixES said:
I guess you were not able to root it?
To know exactly how capable the device is then its necessary take modem logs and let smart people parse it.
https://cacombos.com/contribute "Qualcomm" section for Sonys.
Click to expand...
Click to collapse
Unfortunately not, so this will be going back for refund, I can`t justify spending 1600.00 on phone and not able to root and do with it what I want with it, but there`s always the global version I could go back too, I`m going return it and wait and see if Sony does eventually allow it to unlock the bootloader, until then I`ll just use my Pixel 6 pro for now.
Can you please let me know if :
a. the NA model has Dual SIM support ?
b. Face unlock works (was told the fingerprint scanner is a bit finicky)
arun_suresh said:
Can you please let me know if :
a. the NA model has Dual SIM support ?
b. Face unlock works (was told the fingerprint scanner is a bit finicky)
Click to expand...
Click to collapse
a. there is dual sim support, but you will lose the micosd card, because Sim 2 uses the microsd slot
b. no face unlock and both global and USA version`s the fingerprint readers worked perfect.
Is the 5G SA standalone or NSA only?
Should be both on all versions, USA model difference is mmWave support.
Would also like to know if they finally enabled 5G SA on T-Mobile with this year models.
DeXel55 said:
Would also like to know if they finally enabled 5G SA on T-Mobile with this year models.
Click to expand...
Click to collapse
You can know that without buying phone. Download the firmware with xperifirm, extract modem.img and use ELFextract to extract your hw variants .mbn file. This will reveal the carrier/band policy files (in policyman folder) which live in the modem. There you can see which bands are enabled for specific operators and if they are enabled for SA and NSA.
VeixES said:
You can know that without buying phone. Download the firmware with xperifirm, extract modem.img and use ELFextract to extract your hw variants .mbn file. This will reveal the carrier/band policy files (in policyman folder) which live in the modem. There you can see which bands are enabled for specific operators and if they are enabled for SA and NSA.
Click to expand...
Click to collapse
Thanks for the tip. I got as far as extracting mbn files. I can't seem to find ELFextract tool you've mentioned. I'm assuming this is different than readelf utility.
2015Ducatimulti said:
yeah I had t-mobile then I switched to GoogleFi last month, and wifi calling works perfect, inside my work place service from all carriers suck, since it big steel building, but my Xperia 1 IV will say emergency calls only, but I can receive calls and make calls and receive text, ad everything just like had full bars of carrier service.
Click to expand...
Click to collapse
Thank you for confirming that Google fi does utilize Wi-Fi calling on the Xperia 1 IV.

Question Sony Xperia 1 iii xq-bc62 5G not working. Flash xq-bc52?

Hi, i bought a unlocked xq-bc62 in US. I travel a lot and discovered 5G won't work in several carriers networks, no matter what I do in the phone ( I spend more time outside US). I called the carriers support and they confirmed their network doesn't have any lock preventing the use of overseas 5G bought phones. So far, I tried to use it in Portugal, UK, Ireland and Brazil but 5G is not recognized by the phone. I changed the sim for a 5G local one, changed ASN, manually chose network (5G ones are not displayed) and no success. I even tried to pray, but again, no success. I contacted Sony Support and they said phone will only work in 5G in 2 of the 3 main carriers in US and not outside US, despite the phone tech specs says it will work in all the frequencys used by above carriers. There are some threads here that confirm xq-bc62 Is not a full 5g phone. All said and done, my Question: is it possible to flash another region Image like xq-bc52 or xq-bc72 in this hardware? Will it work fine and, mainly, will 5G networks be accessible outside US? Tks
Some times its hardware but you can try mtk engineer mode settings there may be something of use there
If you can get the original vendor file usually have (user low ship...) its usually international
Unless the phone is using 4.5G and not real 5G
marcofgn2 said:
Hi, i bought a unlocked xq-bc62 in US. I travel a lot and discovered 5G won't work in several carriers networks, no matter what I do in the phone ( I spend more time outside US). I called the carriers support and they confirmed their network doesn't have any lock preventing the use of overseas 5G bought phones. So far, I tried to use it in Portugal, UK, Ireland and Brazil but 5G is not recognized by the phone. I changed the sim for a 5G local one, changed ASN, manually chose network (5G ones are not displayed) and no success. I even tried to pray, but again, no success. I contacted Sony Support and they said phone will only work in 5G in 2 of the 3 main carriers in US and not outside US, despite the phone tech specs says it will work in all the frequencys used by above carriers. There are some threads here that confirm xq-bc62 Is not a full 5g phone. All said and done, my Question: is it possible to flash another region Image like xq-bc52 or xq-bc72 in this hardware? Will it work fine and, mainly, will 5G networks be accessible outside US? Tks
Click to expand...
Click to collapse
Yep, the US models have numerous disabled features and run late on updates. I've also noticed it's crippled or disabled while roaming. I'm not sure if it's directly from disabled features or it it has been blocked by telcos because it malfunctions. (It gets kicked off cell towers in the US)
The US model has slightly different radio hardware so I would expect problems flashing the OS from another region. There are some tricks for changing the feature lists that might be a safer bet.
kevinmcmurtrie said:
Yep, the US models have numerous disabled features and run late on updates. I've also noticed it's crippled or disabled while roaming. I'm not sure if it's directly from disabled features or it it has been blocked by telcos because it malfunctions. (It gets kicked off cell towers in the US)
The US model has slightly different radio hardware so I would expect problems flashing the OS from another region. There are some tricks for changing the feature lists that might be a safer bet.
Click to expand...
Click to collapse
How would one check what is and isn't turned on network wise??
I was able to flash the XQ-BC52 ROM in my XQ-BC62 hardware. So far, working fine in 4G+, but I´m in area with no 5G coverage. Tomorrow I will go to an 5G area and check f it worked. If not, I will try the XQ-BC72. I will keep you posted.
kevinmcmurtrie said:
Yep, the US models have numerous disabled features and run late on updates. I've also noticed it's crippled or disabled while roaming. I'm not sure if it's directly from disabled features or it it has been blocked by telcos because it malfunctions. (It gets kicked off cell towers in the US)
The US model has slightly different radio hardware so I would expect problems flashing the OS from another region. There are some tricks for changing the feature lists that might be a safer bet.
Click to expand...
Click to collapse
Would you mind to message me what tricks you are talking about? Tks
marcofgn2 said:
Would you mind to message me what tricks you are talking about? Tks
Click to expand...
Click to collapse
Maybe something along the lines of Getting VoLTE and VoWiFi on unlisted carriers by flashing mbn file or 5II/1&5III VoLTE patch. [Guide to release the root] or https://band.radio/
I haven't rooted yet so I haven't tried them. I bring a T-Mobile LG Velvet 5G with me when I travel. It's a little slower but doesn't have all the telco problems.
Test done, xqbc-52 doesn't see 5G network as well. XQ-BC72 SEA is a no go, don't even recognize the SIM card in the phone.
Will try another firmwares and the tweaks kevinmcmurtrie mentioned above, but my feeling is: I paid the 5G price for the Phone and actually got a a 4G Phone. Very frustrated with Sony. Thinking seriously about going back to Samsung.
marcofgn2 said:
Test done, xqbc-52 doesn't see 5G network as well. XQ-BC72 SEA is a no go, don't even recognize the SIM card in the phone.
Will try another firmwares and the tweaks kevinmcmurtrie mentioned above, but my feeling is: I paid the 5G price for the Phone and actually got a a 4G Phone. Very frustrated with Sony. Thinking seriously about going back to Samsung.
Click to expand...
Click to collapse
But hey here's the pros, best physical camera sensors, Micro SD card Slot and headphone jack...
UPDATE!!! 5G is working!!!!! After Several Attempts, I finally got 5G. What worked for me, in Claro BR Network, was flash a Hybrid ROM. I Flashed A XQ-BC52 ROM with Modem files from XQ-BC72. So far everything working as it should. My only concern, next month I will be in Germany, may I have trouble in LTE over there with XQ-BC72 modems?
Ainz_Ooal_Gown said:
But hey here's the pros, best physical camera sensors, Micro SD card Slot and headphone jack...
Click to expand...
Click to collapse
Tks for the spirits up Ainz_Ooal_Gown. The main reason I Bougth Sony 1 iii is the 3,5 mm jack. I hate USB adapters......
Ok, major setback. it worked for 3 hours and when I turned on my second Sim card the phone 5G was gone. Turned it off, reset radio configs, but no success. Apparently turning the second sim on override the BC72 configs. Time to get serious now and root the phone, what I'm very reluctant to do.
marcofgn2 said:
UPDATE!!! 5G is working!!!!! After Several Attempts, I finally got 5G. What worked for me, in Claro BR Network, was flash a Hybrid ROM. I Flashed A XQ-BC52 ROM with Modem files from XQ-BC72. So far everything working as it should. My only concern, next month I will be in Germany, may I have trouble in LTE over there with XQ-BC72 modems?
Click to expand...
Click to collapse
How did you manage to do that? Could you please explain the process?
Settings, Network & internet, Smart connectivity and turn off. On by default. See if it works. I found where I am at it tends to look for wifi over 5G.
arjun_m4 said:
How did you manage to do that? Could you please explain the process?
Click to expand...
Click to collapse
That's what I want to more..i have the xq-bc72 on mint mobile and no5g.even my kids xiaomi 11 5g ne has 5g on mint.
I am on Mint, T-mobile towers. 5G works great, has to be in your settings. For MMS use the T-mobile APN settings.
I would like to activate 4g+ on my xq-bc52!
how to do ?
thank you.

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