T-Mobile Version VS Unlocked - T-Mobile Samsung Galaxy Note 8 Questions & Answers

I have the unlocked version and i wanted to know if there are any benefits to flashing the t-mobile firmware onto it?

Does your Wi-Fi calling work on the unlocked version?

renegaderon said:
Does your Wi-Fi calling work on the unlocked version?
Click to expand...
Click to collapse
Yes it does. I've been reading that it doesn't have Carrier aggregation/ mimo/ qam stuff. Do you know if t-mobile gets an os update first or does the unlocked get it first? Just trying to see which is best.

Friendlyx355 said:
Yes it does. I've been reading that it doesn't have Carrier aggregation/ mimo/ qam stuff. Do you know if t-mobile gets an os update first or does the unlocked get it first? Just trying to see which is best.
Click to expand...
Click to collapse
T-Mobile gets update first, hardware exactly the same...activated with firmware

renegaderon said:
Does your Wi-Fi calling work on the unlocked version?
Click to expand...
Click to collapse
I would also like to know the answer to that question.

grunt0300 said:
I would also like to know the answer to that question.
Click to expand...
Click to collapse
I have an Unlocked S8 Plus on T-Mo. Yes, WiFi calling works out of the box.
I've not heard a definitive answer about the MIMO or QUAM 256 (I think that is what it's called?). I know if you flash T-Mo software, it all works, but I dont know 100% if the LATE advanced stuff works on the unlocked firmware.
I will probably switch to the T-Mo software personally, since I live in one of the LATE Advanced trifecta areas, and honestly the T-Mo firmware is bloat free. The only thing they add is the T-Mobile app, the Device Unlock app, and a T-Mobile boot screen/sound.

If you don't want the T mobile apps/bloat flash the The XAA AP, XAA BL, and the TMO CSC. you can flash either the XAA or TMO CP(doesn't matter). you will have the unlocked firmware with no carrier apps baked in and still have the TMO features like wifi calling, RCS video calling and advanced messaging. will also have the TMO dialer instead of the unlocked dialer app. you will however have the TMO boot up splash screen. works, looks, acts just like a stock t mobile device minus the stupid t mobile apps. if you flash the TMO AP or USERDATA files, you will get the TMO apps. when both XAA and TMO updates are both released, you can then reflash the latest files together in the same sequence above per future software updates

Related

Amber for AT&T Dev devices

HI,
I just check with NCS and found there is an amber update for AT&T dev devices - I'm running it, because has 2g/3g/4g switch, sms receipent notification and other things which I miss badly in prea Amber AT&T stock ROM.
I'm wondering why I don't receive it over OTA.
I'm going to flash my device after few minutes...I'll waste few hours to configure my applications from scratch, but at least they will install automatically
boril said:
HI,
I just check with NCS and found there is an amber update for AT&T dev devices - I'm running it, because has 2g/3g/4g switch, sms receipent notification and other things which I miss badly in prea Amber AT&T stock ROM.
I'm wondering why I don't receive it over OTA.
I'm going to flash my device after few minutes...I'll waste few hours to configure my applications from scratch, but at least they will install automatically
Click to expand...
Click to collapse
When you flash it, can you check if it has the 1700 frequency?
Thanks.
--
ARG
abelitin said:
When you flash it, can you check if it has the 1700 frequency?
Thanks.
--
ARG
Click to expand...
Click to collapse
how can I check this ? I'm not using on AT&T - I'm in Europe - Bulgaria.
boril said:
how can I check this ? I'm not using on AT&T - I'm in Europe - Bulgaria.
Click to expand...
Click to collapse
Haha, oh well. The easiest way would be to see if the phone finds any AWS operator in that frequency (1700/2100 MHz, for instance). But I think none in Bulgaria does...
Thanks for the reply nonetheless...
--
ARG
Thanks for the heads up boril. I've been wanting to go to the Amber update, but didn't want to load an European rom quite yet. Was able to flash to my ATT 920.
Etaduck said:
Thanks for the heads up boril. I've been wanting to go to the Amber update, but didn't want to load an European rom quite yet. Was able to flash to my ATT 920.
Click to expand...
Click to collapse
will I still be able to use att us lte with this rom?
TripOG said:
will I still be able to use att us lte with this rom?
Click to expand...
Click to collapse
HI,
Yes, this is ROM from AT&T developers variants of 920(I think they are penta bands), so I presume you can use LTE on AT&T.
NEVERTHELESS I use mine in Europe, so I cannot confirm about AT&T LTE.
TripOG said:
will I still be able to use att us lte with this rom?
Click to expand...
Click to collapse
So I did mange to get LTE back on my phone. Though it did take a second flash, and on this run I couldn't connect to cellular data to set up my account and auto-download my apps and settings. So some settings from the Rogers flash must have remained on move back to ATT rom's that a)allowed me to connect to cell network during initial setup b) prevented me from using LTE. I had done a reset after the upgrade to portico on the rogers ROM, flashed to ATT Dev, but still no joy on LTE, reflashed again ATT Dev after a day or two, and seems like all is good.
this may be a really dumb question but can I flash this on a retail att device?
jro2020 said:
this may be a really dumb question but can I flash this on a retail att device?
Click to expand...
Click to collapse
HI,
Yes, I'm with AT&T stock device.
Pay-attention you cannot go straight flashing to AT&T Dev..
Read this for more information.
http://forum.xda-developers.com/showpost.php?p=44995213&postcount=8
boril said:
HI,
Yes, I'm with AT&T stock device.
Pay-attention you cannot go straight flashing to AT&T Dev..
Read this for more information.
http://forum.xda-developers.com/showpost.php?p=44995213&postcount=8
Click to expand...
Click to collapse
okay let me see if I have a clear understanding of this. I'm on ATT portico, so first I have to find and flash recovery Att Pre Protico, Flash Roger Pre Portico, OTA update to portico, and then I can flash recovery to ATT Dev?
boril said:
HI,
I just check with NCS and found there is an amber update for AT&T dev devices - I'm running it, because has 2g/3g/4g switch, sms receipent notification and other things which I miss badly in prea Amber AT&T stock ROM.
I'm wondering why I don't receive it over OTA.
I'm going to flash my device after few minutes...I'll waste few hours to configure my applications from scratch, but at least they will install automatically
Click to expand...
Click to collapse
You won't receive it OTA till AT&T adds their garbage to it. Nokia creates the base version then AT&T will add to it and once they are done and happy with the added bloat they will push it. Just becuase Nokia has released it does not mean AT&T has released it. You all have an unfinished ROM if you get this one from Nokia.
Solarenemy68 said:
You won't receive it OTA till AT&T adds their garbage to it. Nokia creates the base version then AT&T will add to it and once they are done and happy with the added bloat they will push it. Just becuase Nokia has released it does not mean AT&T has released it. You all have an unfinished ROM if you get this one from Nokia.
Click to expand...
Click to collapse
I was talking about AT&T Dev update..not the AT&T stock..it was present at the severs, but I didn't receive it with OTA.
jro2020 said:
okay let me see if I have a clear understanding of this. I'm on ATT portico, so first I have to find and flash recovery Att Pre Protico, Flash Roger Pre Portico, OTA update to portico, and then I can flash recovery to ATT Dev?
Click to expand...
Click to collapse
no you have to flash to rogers pre protico, OTA rogers, then you go to AT&T Dev Amber.
No need to flash to AT&T pre protico I think.

SM-G930U Conversion for all US Snapdragon galaxy s7

THIS PAGE HAS BEEN UPDATED FOR OREO.
What You need:
USB cable
Functioning windows computer
Samsung drivers https://developer.samsung.com/galaxy/others/android-usb-driver-for-windows
Odin https://samsungodin.com/download/Odin3_v3.13.1.zip
Firmware https://updato.com/firmware-archive-select-model?record=775B2534959211E89F15FA163EE8F90B
Instructions:
Step 1: Put Phone In download Mode by holding down Volume Down+Home+Power Buttons.
Step 2: plug phone into computer and make sure odin shows a com symbol with the word com and a number If it doesn't then use the drivers link I provided
Step 3: load ap bl cp and Csc into odin and then click start when it loads completely.
Step 4:wait for phone to complete flashing and it will reboot to recovery do not touch it until it reaches the setup screen
And you are done.
WIFI CALLING, VOLTE AND ATT VIDEO CALL DO NOT WORK ON THIS FIRMWARE ON ATT OR SPRINT(CORRECT ME IF IM WRONG) ALSO THIS WORKS ON ALL US MODEL S7 NOT S7 EDGE
Princecomsys modified odin: https://www.androidfilehost.com/?fid=24591023225177749
Thanks to psouza4
Chuckles5150 said:
Princecomsys modified odin: https://www.androidfilehost.com/?fid=24591023225177749
Thanks to psouza4
Click to expand...
Click to collapse
Oh I forgot to add that my bad
loganbeck14 said:
Oh I forgot to add that my bad
Click to expand...
Click to collapse
Has anyone been able to get WiFi calling or VOLTE to work on the U firmware? I haven't been on it in a while.
Edit: not sure why i quoted you for this question. Lol sorry.
I have been trying to get it working as well. I wish that att would support wifi calling like T-Mobile does I only get 1-2 bars and sometimes no signal when I'm at a certain spot in my workplace and when I had the original att software on my phone I loved wifi calling, I don't particularly miss VOLTE though
Thank you so much for doing this. I was using the wrong Odin to flash.
Quick question on this. Now that I am running the U firmware, will I get OTA updates? I'm using a Cricket sim card.
I hated the AT&T firmware so much. I'm so much happier with this.
TaTaTaing said:
Thank you so much for doing this. I was using the wrong Odin to flash.
Quick question on this. Now that I am running the U firmware, will I get OTA updates? I'm using a Cricket sim card.
I hated the AT&T firmware so much. I'm so much happier with this.
Click to expand...
Click to collapse
Yes, you will be able to receive U firmware OTA updates.
what is the difference between this is the stock firmware on the att phones??
im on tmobile with an unlocked att s7.
Does anyone know whether or not this will work on Cricket S7 (G930AZ)?
eqt2010 said:
Does anyone know whether or not this will work on Cricket S7 (G930AZ)?
Click to expand...
Click to collapse
Another user tried it on my old thread and it worked for them
loganbeck14 said:
I have been trying to get it working as well. I wish that att would support wifi calling like T-Mobile does I only get 1-2 bars and sometimes no signal when I'm at a certain spot in my workplace and when I had the original att software on my phone I loved wifi calling, I don't particularly miss VOLTE though
Click to expand...
Click to collapse
Need to flash T-Mobile firmware in order for at least wifi calling to work.
after flashing this firmware.. I noticed a huge gain in performance.
and mobile hotspot works, I run cricket unlimited, and will come in handy.
I like the clean appearance and the smooth responsiveness, I used the AT&T firmware and I used PDP to disable a ****load of bloat, but nothing like this smooth.
not to mention I'm getting updates, which I'm more happy about.
this is really nice to have.
Had anyone tried this and used on rogers?
loganbeck14 said:
To begin make sure you have samsung usb drivers installed. Now make sure you use Princecomsys modified odin, next download the latest U Firmware from here https://www.androidfilehost.com/?fid=817550096634768085 or here https://www.androidfilehost.com/?fid=457095661767159704. Next put your phone in download mode and open odin make sure all firmware files are in the right spot and click start wait until your phone boots into recovery mode and restarts, after that to clean up old temp files factory reset in recovery when your phone boots to the welcome screen, after that you are finished. THIS is For att and tmobile phones only unless your verizon phone is using one of the two carriers sprint won't work due to proprietary activation processes. Thanks to Princecomsy and muniz for providing odin and the firmware files for this version
Click to expand...
Click to collapse
Would this work on an unlocked at&t model?
Thanks
chudm said:
Would this work on an unlocked at&t model?
Thanks
Click to expand...
Click to collapse
Yes, it works on all us Qualcomm snapdragon s7's including unlocked ones
loganbeck14 said:
Yes, it works on all us Qualcomm snapdragon s7's including unlocked ones
Click to expand...
Click to collapse
Thanks i was worried if i updated it to this firmware the cellphone would get locked again to at&t
chudm said:
Thanks i was worried if i updated it to this firmware the cellphone would get locked again to at&t
Click to expand...
Click to collapse
As long as you had att unlock the phone you are fine
I bought it "factory unlocked" so I'm not sure who did it. What would happen if att didn't unlock it?
Please help me understand
I see some forums on this site that says, " G930UUEU2APEH flashes to g930a" then you have this post that says G930U firmware on SM-G930A. It seems as if one is saying to take the G930U and go to G930A and the other saying G930A and go to G930U. I thought the advantage is to go to the U and get off the A. Please confirm if this is the case. Granted then if this is the case... then, what are the advantages of going to the U? From what I understand it gets rid of the bloatware, and makes it so you can tether?
Also once I go, are there any negative reasons for me not to go from A to U?
Does this give me the current version of Nougat?
Do I get the upgrades from AT&T to keep up with future version of Nougat?
Also before proceeding to the U version MUST I first ROOT my phone?
Also MUST my phone be UNLOCKED?
Thanks in advance,
DavyCrockett said:
From what I understand it gets rid of the bloatware, and makes it so you can tether?
Yes to both
Also once I go, are there any negative reasons for me not to go from A to U?
None, unless you like the ATT bloat.
Does this give me the current version of Nougat?
Gives you the latest version of the U firmware
Do I get the upgrades from AT&T to keep up with future version of Nougat?
No, you will get the U OTAs from now on.
Also before proceeding to the U version MUST I first ROOT my phone?
Root is not required
Also MUST my phone be UNLOCKED?
Not required
Thanks in advance,
Click to expand...
Click to collapse
2char

Will flashing the unlocked firmware still work on carrier models of the s9+?

Anyone know or have insight?
Won't know until the phone is in the hands of the tinkerers. It has been that way, FWIW, since the GS7/GS7E.
Sent from my SM-N910C using Tapatalk
optimummind said:
Won't know until the phone is in the hands of the tinkerers. It has been that way, FWIW, since the GS7/GS7E.
Sent from my SM-N910C using Tapatalk
Click to expand...
Click to collapse
Hopefully we find out soon. I have an at&t version I want to install TMobile or unlocked firmware coming around the 16th :fingers-crossed:
BoboBrazil said:
Anyone know or have insight?
Click to expand...
Click to collapse
Check the S8/S8+ fourms
It works. I just flashed the unlocked firmware on my Verizon model. Only issue I'm having is trying to figure out how to access IMS Settings, can't access through nova or shortcut master. Visual voicemail works.
cdcaish said:
It works. I just flashed the unlocked firmware on my Verizon model. Only issue I'm having is trying to figure out how to access IMS Settings, can't access through nova or shortcut master. Visual voicemail works.
Click to expand...
Click to collapse
Can i do it vice versa, like flash carrier firmware on unlocked model. Will it trip knox and will i lose warranty?
yeltrah123 said:
Can i do it vice versa, like flash carrier firmware on unlocked model. Will it trip knox and will i lose warranty?
Click to expand...
Click to collapse
Hello,
NO, flashing carrier's firmware on unlocked model dosen't trip knox, so you don't lose warranty.
Grettings,
SwitchDeath
SwitchDeath said:
Hello,
NO, flashing carrier's firmware on unlocked model dosen't trip knox, so you don't lose warranty.
Grettings,
SwitchDeath
Click to expand...
Click to collapse
Ok thanks because I saw the carrier versions were model # SM-G965U and I was worried because I have model SM-G965U1.
yeltrah123 said:
Ok thanks because I saw the carrier versions were model # SM-G965U and I was worried because I have model SM-G965U1.
Click to expand...
Click to collapse
You welcome, you don't have to worry, flashing SM-G965U firmware on your SM-G965U1 model will work anyway.
Grettings,
SwitchDeath
SwitchDeath said:
You welcome, you don't have to worry, flashing SM-G965U firmware on your SM-G965U1 model will work anyway.
Grettings,
SwitchDeath
Click to expand...
Click to collapse
ok
I am happy to report that after flashing the Sprint firmware on my unlocked S9+ it worked with no issues and knox was not tripped. I've noticed that even though the Sprint splashscreen didn't show up at boot, while in setup the phone did detect the exact carrier I was on (Boost Mobile) and the phone showed the Boost Mobile splashscreen upon reboot and all the Boost Mobile apps as well as some bloatware loaded onto the phone as if it were a phone I purchased through them. But one issue I still notice since when I first bought the phone is the fact that the data speeds are slow in my area, but when I had an LG Stylo 3 from Boost in the area now where I see the slow data speeds, the LG didn't have that issue. I thought flashing carrier firmware would fix that problem. When I am in other parts in NYC out from where I live, ex: Manhattan, Brooklyn; I don't see no slow speeds I get true, fast 4G LTE. I guess it's a software issue Samsung can fix in the next update?
Anyone have link for modified Odin just in case I decide to flash iunlocked S9+ firmware back on my phone?

No WiFi calling option

I have an international S9+ (SM-965F/DS, 256G) and noticed there is no WiFi calling option under Connections/More Connection Settings (or anywhere else). What's up with that? The phone passed all authenticity checks I threw at it, including working Iris scanner and dual-aperture camera, so I really don't think it's a fake.
Of note, I have 2 T-Mobile Sims in it, and everything else seems to be working fine.
Stumped...
Unless you unlock the bootloader and flash the T-Mobile CSC, WiFi calling, VoLTE, video calling, and RCS will not work on the SM-G965F.
Wow, really? Where can I get TMo firmware? And if I do that, will it trip Knox and kill Samsung Pay? Also, will I get Tmo OTA updates after that? Thanks.
chenxiaolong said:
Unless you unlock the bootloader and flash the T-Mobile CSC, WiFi calling, VoLTE, video calling, and RCS will not work on any non-US model.
Click to expand...
Click to collapse
That is incorrect! I have it working perfectly fine on my Canadian version 965W. Did you flash to U1 and stay there or did you flash to the TMB U firmware? I have tried both but went back to U1 because of the updates contain the v2 bootloader. I don't have the option to turn it on in U1 but when I connect to WiFi, WiFi Calling automatically is enabled and yes, I have made calls over WiFi to confirm it works.
jcsww said:
That is incorrect! I have it working perfectly fine on my Canadian version 965W. Did you flash to U1 and stay there or did you flash to the TMB U firmware? I have tried both but went back to U1 because of the updates contain the v2 bootloader. I don't have the option to turn it on in U1 but when I connect to WiFi, WiFi Calling automatically is enabled and yes, I have made calls over WiFi to confirm it works.
Click to expand...
Click to collapse
Thanks, I'll correct my post to say SM-G965F instead of "any non-US model". It seems that the SM-G965W firmware contains all the T-Mobile bits (eg. /system/framework/TmoWfcUtils.jar), while the SM-G965F does not.
jcsww said:
That is incorrect! I have it working perfectly fine on my Canadian version 965W. Did you flash to U1 and stay there or did you flash to the TMB U firmware? I have tried both but went back to U1 because of the updates contain the v2 bootloader. I don't have the option to turn it on in U1 but when I connect to WiFi, WiFi Calling automatically is enabled and yes, I have made calls over WiFi to confirm it works.
Click to expand...
Click to collapse
Lol....dude you have a snapdragon he has exynos so you are totally incorrect actually.
How would you expect him to flash U1 or TMO firmware on an exynos lol?
sent from my Exynos S9 plus, Pixel 2 XL or Note FE
---------- Post added at 10:18 PM ---------- Previous post was at 10:16 PM ----------
chenxiaolong said:
Thanks, I'll correct my post to say SM-G965F instead of "any non-US model". It seems that the SM-G965W firmware contains all the T-Mobile bits (eg. /system/framework/TmoWfcUtils.jar), while the SM-G965F does not.
Click to expand...
Click to collapse
The Canadian and US model are essentially identical.
Our exynos devices are vastly different but also superior in many ways. No locked bootloader for us, snap doesn't even have root!
sent from my Exynos S9 plus, Pixel 2 XL or Note FE
kydar said:
I have an international S9+ (SM-965F/DS, 256G) and noticed there is no WiFi calling option under Connections/More Connection Settings (or anywhere else). What's up with that? The phone passed all authenticity checks I threw at it, including working Iris scanner and dual-aperture camera, so I really don't think it's a fake.
Of note, I have 2 T-Mobile Sims in it, and everything else seems to be working fine.
Stumped...
Click to expand...
Click to collapse
Got the same issue. I'm in the UK and it's not there. One of the reasons I bought it was because I thought it had it - my work colleague has it on EE and has the option.
Mine is the SM-G965F.
white43 said:
Got the same issue. I'm in the UK and it's not there. One of the reasons I bought it was because I thought it had it - my work colleague has it on EE and has the option.
Mine is the SM-G965F.
Click to expand...
Click to collapse
I found the settings you are looking for last night. Instead of being in the Mobile Network tab, like normal Android. Go into the dialer, tab the 3 dots in the top right corner, go to settings, and there they are.
jcsww said:
I found the settings you are looking for last night. Instead of being in the Mobile Network tab, like normal Android. Go into the dialer, tab the 3 dots in the top right corner, go to settings, and there they are.
Click to expand...
Click to collapse
Not on mine
white43 said:
Not on mine
Click to expand...
Click to collapse
In the UK, you will need to have a "branded" handset.
My S9+ was originally from Vodafone, but I'm using it on Three.
To get WiFI calling, I flashed the stock Three firmware.
You can probably get away with a BTU firmware, and flashing your carriers CSC, but I couldn't be bothered as there was very little bloatware on the Three firmware.
Regards,
Dave
Sent from my Pixel 2 XL using Tapatalk
foxmeister said:
In the UK, you will need to have a "branded" handset.
My S9+ was originally from Vodafone, but I'm using it on Three.
To get WiFI calling, I flashed the stock Three firmware.
You can probably get away with a BTU firmware, and flashing your carriers CSC, but I couldn't be bothered as there was very little bloatware on the Three firmware.
Regards,
Dave
Sent from my Pixel 2 XL using Tapatalk
Click to expand...
Click to collapse
Ah - well that explains it!
Do you have linkage to the Three 9+ firmware?
I have heard there is a way to change the CSC without rooting, unlocking bootloader, or tripping Knox. I want to avoid that in order to continue using Samsung Pay. If I absolutely have to choose, I will root to get WiFi calling, but if it's possible to get it without rooting, I'm going to find a way!
white43 said:
Ah - well that explains it!
Do you have linkage to the Three 9+ firmware?
Click to expand...
Click to collapse
I downloaded it from samfirmware.com - links to it aren't permitted here!
Regards,
Dave
kydar said:
I have heard there is a way to change the CSC without rooting, unlocking bootloader, or tripping Knox. I want to avoid that in order to continue using Samsung Pay. If I absolutely have to choose, I will root to get WiFi calling, but if it's possible to get it without rooting, I'm going to find a way!
Click to expand...
Click to collapse
Mixing and matching firmware can be hit and miss. I wouldn't swap Exynos bootloaders with SnapDragon or vice versa though. The CSC contains the bulk of the carrier related settings and apps. There are usually two CSC files. One will wipe, one won't. The CSC_HOME doesn't wipe but may cause some issues. The other will wipe, at least to some degree. You also might want to look at some of the Combination ROM's available to see if they have all of what you need.
In order to flash without tripping things. The modded or patched version of ODIN is needed.
foxmeister said:
I downloaded it from samfirmware.com - links to it aren't permitted here!
Regards,
Dave
Click to expand...
Click to collapse
Do you need to unlock bootloader and root to use new stock firmware? Is Three UK - H3G?
Ta
white43 said:
Do you need to unlock bootloader and root to use new stock firmware? Is Three UK - H3G?
Ta
Click to expand...
Click to collapse
To answer your questions in order, no, no, and yes.
Regards,
Dave
Sent from my Pixel 2 XL using Tapatalk
So if I wanted to flash the US T-Mobile stock firmware, how would I do it? Where would I even get the firmware? It's not on sammobile as far as I can see.
So I flashed the XEU most recent firmware - released a couple days ago. My device is SM-G965F BTU. Downloaded via SamFirm and flashed the four files with Odin.
Now have VoWifi and VoLTE.
---------- Post added at 09:04 AM ---------- Previous post was at 09:03 AM ----------
kydar said:
So if I wanted to flash the US T-Mobile stock firmware, how would I do it? Where would I even get the firmware? It's not on sammobile as far as I can see.
Click to expand...
Click to collapse
What model of Samsung phone do you have?
The latest May update gave me wifi calling on my unbranded xeu phone on Three.
foxmeister said:
In the UK, you will need to have a "branded" handset.
My S9+ was originally from Vodafone, but I'm using it on Three.
To get WiFI calling, I flashed the stock Three firmware.
You can probably get away with a BTU firmware, and flashing your carriers CSC, but I couldn't be bothered as there was very little bloatware on the Three firmware.
Regards,
Dave
Click to expand...
Click to collapse
Good News!! The brand new XEU stock firmware with may security patch for the S9+ works with WiFi calling and Volte so no need to use the three firmware anymore. I don't know about TMobile but the changelogs stated improvements to Volte and VoWiFI so my guess is that lots of carriers where added to get it work in the multi CSC. Btu for some reason uses a different non multi CSC so don't use BTU

Can I Flash AT&T Carrier Software onto an Unlocked S9+?

Hey all,
I've done some rooting in the past, so have knowledge but it's limited comparatively to the community. I bought an Unlocked Snapdragon S9+ from Best Buy and the AT&T FirstNet service for first responders only works for AT&T branded devices. I wanted to try and flash an AT&T image on the phone if possible. Is this possible? Can anyone offer some guidance on how to accomplish this?
jgruberman said:
Hey all,
I've done some rooting in the past, so have knowledge but it's limited comparatively to the community. I bought an Unlocked Snapdragon S9+ from Best Buy and the AT&T FirstNet service for first responders only works for AT&T branded devices. I wanted to try and flash an AT&T image on the phone if possible. Is this possible? Can anyone offer some guidance on how to accomplish this?
Click to expand...
Click to collapse
My S9 plus just did the carrier firmware when I put the Sim card into it. I didn't have to do anything else
Sent from my SM-G965U1 using Tapatalk
tengen31 said:
My S9 plus just did the carrier firmware when I put the Sim card into it. I didn't have to do anything else
Sent from my SM-G965U1 using Tapatalk
Click to expand...
Click to collapse
I don't know what you mean by "did the carrier firmware". I'm looking to wipe and re-flash AT&T firmware on my device - it currently has an AT&T SIM card in it.
jgruberman said:
I don't know what you mean by "did the carrier firmware". I'm looking to wipe and re-flash AT&T firmware on my device - it currently has an AT&T SIM card in it.
Click to expand...
Click to collapse
Oh well you didn't say re- flash. I thought you wanna to get the firmware on your on
Sent from my SM-G965U1 using Tapatalk
jgruberman said:
I don't know what you mean by "did the carrier firmware". I'm looking to wipe and re-flash AT&T firmware on my device - it currently has an AT&T SIM card in it.
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Yep, you can flash the AT&t firmware onto your unlocked device. You would have to download the firmware and then flash it with Odin, you can check the general section to learn more about this and we here can help you through it.
The other thing I was wondering is that I assume that FirstNet works on the AT&t firmware. Technically your phone will still not be an AT&t phone according to its IMEI number, but firmware-wise it will be just as an AT&t phone after you flash it.
YrrchSebor said:
Yep, you can flash the AT&t firmware onto your unlocked device. You would have to download the firmware and then flash it with Odin, you can check the general section to learn more about this and we here can help you through it.
The other thing I was wondering is that I assume that FirstNet works on the AT&t firmware. Technically your phone will still not be an AT&t phone according to its IMEI number, but firmware-wise it will be just as an AT&t phone after you flash it.
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I understand. So get ODIN and the AT&T firmware and just flash? I've done rooting before so familiar with ODIN for the most part, just wasn't sure if I needed a specific firmware version based on having an Unlocked device or not.
And to your wondering thought, FirstNet does work on the AT&T firmware and they WOULD still recognize my phone as an Unlocked device(by IMEI) as per the FirstNet tech support agent I just spoke with. However, I'm hoping that having the firmware would make the device more compatible with the FirstNet service
jgruberman said:
I understand. So get ODIN and the AT&T firmware and just flash? I've done rooting before so familiar with ODIN for the most part, just wasn't sure if I needed a specific firmware version based on having an Unlocked device or not.
And to your wondering thought, FirstNet does work on the AT&T firmware and they WOULD still recognize my phone as an Unlocked device(by IMEI) as per the FirstNet tech support agent I just spoke with. However, I'm hoping that having the firmware would make the device more compatible with the FirstNet service
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You just need the latest AT&T firmware that you can find(BRK2 I believe, unless the latest pie firmware has already been posted somewhere), and you will need the patched version of Odin that will allow you to flash a different firmware than your device came with. It seems like AT&t firmwares can be hard to find for some reason but there was this thread which has not been updated I don't think: https://forum.xda-developers.com/ga...ck-official-attoding965usqu3brj5-s9-t3866823. But it looks like that would at least get you over to AT&t firmware and then you could get OTA updates up to current hopefully. You might want to ask in that thread for further instructions on firmware and how to flash everything properly. You would want to use CSC instead of HOME-CSC, to wipe and fully set up the phone, and there is something which I don't know about called USERDATA, which I think might need to be found and flashed also.

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