Need help with custom ROM on Galaxy S9+ Dual sim - Samsung Galaxy S9+ Questions & Answers

Hello all,
Just bought a Samsung Galaxy S9+ dual sim (SM-G965F/DS) (G965FXXS7GSJ3) international model. Since I inserted my T-Mobile sim card I can only get the 4G signal and no LTE (also tried Verizon sim card and the same result). Speed test on 4G with a few different location (Northwest) and the result from 1.00mbps - 22 mbps max. I online chat with Samsung support and found out that USA don't support dual-sim and that's the reason I don't get the LTE service.
Is there a custom ROM or a way to flash my phone so that I can use the LTE service on my phone?
Thanks

supasieu said:
Hello all,
Just bought a Samsung Galaxy S9+ dual sim (SM-G965F/DS) (G965FXXS7GSJ3) international model. Since I inserted my T-Mobile sim card I can only get the 4G signal and no LTE (also tried Verizon sim card and the same result). Speed test on 4G with a few different location (Northwest) and the result from 1.00mbps - 22 mbps max. I online chat with Samsung support and found out that USA don't support dual-sim and that's the reason I don't get the LTE service.
Is there a custom ROM or a way to flash my phone so that I can use the LTE service on my phone?
Thanks
Click to expand...
Click to collapse
Sorry but whoever told you they don't support DS sounds like BS to me, the carrier only see the phone signal, they don't know if it's coming from a single sim, dual sim or multi sim gateway device.
If you go into.....
settings --> connections --> mobile networks
and make sure both sims are set for LTE

1- 4G/LTE are the same. LTE/4G icon changes depending on ROM and carrier.
2- Samsung agent has no idea. It's a person on a generic building in India contracted by Samsung most probably.
If you own a dual sim s9+ you can get both modems/sims to work on 4G/LTE even at the same time.
If you see 4G you are working on LTE. Then what speed you get it depends on several factors, not just the phone or signal
Sent from S.G. S9 Plus Duos using Tapatalk

Related

[Q] SIII SHV-E210 (korean) on AT&T 4G/LTE

While I was working in Korea, I bought a Galaxy s3 SHV-E210 (Korean Model) cell phone. When I bought, I was told that I would be able to use it over here in the States. AT&T was able to put a sim card and activate it on their network, however I only get 3G. The Sales rep told me that the bands for 4G/LTE are different in Korea than stateside carriers, so I may, or may not pick up 4G/LTE. I've done some research and found that the band in the phone can be changed using certain codes. When I enter *#9090# it brings up a menu, I've tried changing some of the 4G/LTE, 3G options in that menu but I never get 4G. I know how to root and put custom firmware on devices, so if that is something I need to do then I am comfortable with that. Can this phone be changed to get a 4G/LTE signal? are there any more "codes" that I can enter in to get any other options that will help me? has anyone here ever change the band on their phone to work on 4g? Thank you for any and all help.
AT&T uses LTE band 1 for service.
since E210S only supports band 3 and 5, and 3 and 8 for E210K, there's no way to access AT&T LTE network with your device.
It is reported to support band 1 for newer devices like S5 and G3 and AT&T LTE devices might work in Korea since May 2014,
LTE won't be available with Korean S3 in US.
adamijin said:
While I was working in Korea, I bought a Galaxy s3 SHV-E210 (Korean Model) cell phone. When I bought, I was told that I would be able to use it over here in the States. AT&T was able to put a sim card and activate it on their network, however I only get 3G. The Sales rep told me that the bands for 4G/LTE are different in Korea than stateside carriers, so I may, or may not pick up 4G/LTE. I've done some research and found that the band in the phone can be changed using certain codes. When I enter *#9090# it brings up a menu, I've tried changing some of the 4G/LTE, 3G options in that menu but I never get 4G. I know how to root and put custom firmware on devices, so if that is something I need to do then I am comfortable with that. Can this phone be changed to get a 4G/LTE signal? are there any more "codes" that I can enter in to get any other options that will help me? has anyone here ever change the band on their phone to work on 4g? Thank you for any and all help.
Click to expand...
Click to collapse
its working for me after covert the the os to international version

From CDMA to GSM

Hi it s possible to make a Samsung Galaxy Tab 3 7.0 CDMA bought in the USA to work in Italy GSM networks?
It have a Sprint SIM in it that obviously not work in Italy....
Thanks
theblueray said:
Hi it s possible to make a Samsung Galaxy Tab 3 7.0 CDMA bought in the USA to work in Italy GSM networks?
It have a Sprint SIM in it that obviously not work in Italy....
Thanks
Click to expand...
Click to collapse
From what I can tell, there is no hardware for GSM support in that model, so this is not an option. Just because it has a SIM slot, does not mean it has the necessary antennas and such for other network support. Your best bet would be to use your phone as a hotspot or get a mobile hotspot if you are trying to use it without traditional wifi.

Issue with Verizon S4 Prepaid build OH7 : i545ppvruaoh7 Please help

Hi there, i was able to get one of these from a local walmart for about $150 bucks, its a Verizon Prepaid samsung Galaxy S4 i545PP i545ppvruaoh7 is the build, and it comes with lolipop.
the reason why i bought is is because according to http://willmyphonework.net/
this phone was supposed to support 4G LTE Band4-AWS , but it does not!
it sure comes unlocked, i can put any sim card and i get signal, i get 2g, 3g, H, H+
I tried different sim cards and the best it can do is H+ on all of them.
I tried changing it to global, and also changing it to LTE GSM etc on the android menu but i have no luck.
Is there any way to enable the 4G on this phone? I live in a contry where all carriers use the same 3G and 4G that At&T uses. So here all At&T phones got 2g, 3g,and 4g out of the box. And i thought this verizon phone supported 4G Band4.
ZeldaWW said:
Hi there, i was able to get one of these from a local walmart for about $150 bucks, its a Verizon Prepaid samsung Galaxy S4 i545PP i545ppvruaoh7 is the build, and it comes with lolipop.
the reason why i bought is is because according to http://willmyphonework.net/
this phone was supposed to support 4G LTE Band4-AWS , but it does not!
it sure comes unlocked, i can put any sim card and i get signal, i get 2g, 3g, H, H+
I tried different sim cards and the best it can do is H+ on all of them.
I tried changing it to global, and also changing it to LTE GSM etc on the android menu but i have no luck.
Is there any way to enable the 4G on this phone? I live in a contry where all carriers use the same 3G and 4G that At&T uses. So here all At&T phones got 2g, 3g,and 4g out of the box. And i thought this verizon phone supported 4G Band4.
Click to expand...
Click to collapse
Are you sure ATT uses band 4 (AWS - 1700/2100) in your area? ATT uses a number of different LTE bands in different areas, and the Verizon S4 (prepaid or not) only supports band 4.
im sure my carrier uses same band as At&T, 100% positive that my carrier uses Band 4.
reason is because i also bought two other phones, a moto E At&T gophone and i unlocked it and i got 4G icon at first boot with the carrier here.
but verizon galaxy S4 prepaid is different, i canĀ“t get more than H+, i have never seen the 4G icon
and i dont think there is a hack for it to enable all bands

Need dual sim 4g 3g phone that will work with AT&T in USA

Hello, im looking for a dual phone that can do 4g on sim1 and 3g on sim2 in the USA with AT&T service. Sim 2 will be mainly for phone calls since att is discontinue 2g. Please include model of phone. Thanks in advance. Looking for new or used phone around 150 to 250 price range.

S9+ Duos and Exynos - Dual Sim Dual VoLTE?

Is Galaxy S9+ Duos with Exynos SoC Dual Sim Dual VoLTE or 2nd Sim Card is 2G/3G only?
So, you will want to use two different SIMs and speak use VoLTE for both?
I think it's possible. I have never thought of it this way, but it should work (although I do not have any evidence to back it up)
Looks like SIM2 won't do LTE at all according to phonemore http://www.phonemore.com/samsung-galaxy-s9-plus-sm-g965fds/specs/3886
2G network SIM2: GSM 850/900/1800/1900
3G network SIM2: Not supported
4G network SIM2: Not supported
Data network SIM2: GPRS, EDGE
Click to expand...
Click to collapse
Sorry, but Phonemore specs are completely unbelievable. It's simply bullsh...
Galaxy S7 Edge, Galaxy S8+ Duos and Note 8 Duos (all with Exynos) have 2nd SIM 2G/3G capable. Why could S9+ have only 2G network on 2nd SIM, if older models have 2G/3G?
Galaxy S9+ Duos with Snapdragon SoC supports 4G and VoLTE on both simcards simultaneously. Is it the same with Exynos version?
jano7878 said:
Sorry, but Phonemore specs are completely unbelievable. It's simply bullsh...
Galaxy S7 Edge, Galaxy S8+ Duos and Note 8 Duos (all with Exynos) have 2nd SIM 2G/3G capable. Why could S9+ have only 2G network on 2nd SIM, if older models have 2G/3G?
Galaxy S9+ Duos with Snapdragon SoC supports 4G and VoLTE on both simcards simultaneously. Is it the same with Exynos version?
Click to expand...
Click to collapse
Unfortunately non of this devices you mention supports 3G. You have to switch in settings in order to have suport 3G,4G for sim 2 and vice versa.
S8 Exynos (G950FD) supported VOLTE on both SIM but not simultaneously; the other SIM would no longer remain in VOLTE network mode if you selected that mode for one SIM.
It's a shame that below $100 xiaomi phones now support VOLTE simultaneously on both SIM but Samsung doesn't. I hope S9 series does.
madnav said:
S8 Exynos (G950FD) supported VOLTE on both SIM but not simultaneously; the other SIM would no longer remain in VOLTE network mode if you selected that mode for one SIM.
It's a shame that below $100 xiaomi phones now support VOLTE simultaneously on both SIM but Samsung doesn't. I hope S9 series does.
Click to expand...
Click to collapse
If you find out that it does will you let me know please. Currently sitting on the Mate 10 Pro which does Dual VOLTE and Dual SIM 4G, if the S9 can do this too then I'll definitely upgrade!
Crombi said:
If you find out that it does will you let me know please. Currently sitting on the Mate 10 Pro which does Dual VOLTE and Dual SIM 4G, if the S9 can do this too then I'll definitely upgrade!
Click to expand...
Click to collapse
Well, my pre-order is expected to be delivered by 17th March; I can test and let you know by then.
Will voLTE be enabled by default on unlocked phones? Or will I have to buy an operator modified ROM to have the option to use the VoLTE or Wifi calling services?
Thanks
Its Hybrid Dual-Standby config so unfortunately only 1 sim can be primary at 4G/VoLTE and other can be only 3G/2G at that time.
Yea, I've just got my S9+ Exynos and I can confirm: when 1st SIM card is connected to LTE/VoLTE service, the second SIM card is connected to 3G network
No Dual Sim Dual VoLTE.
Shame on you, Samsung. Half year old Huawei Mate 10 Pro is better choice.
jano7878 said:
Yea, I've just got my S9+ Exynos and I can confirm: when 1st SIM card is connected to LTE/VoLTE service, the second SIM card is connected to 3G network
No Dual Sim Dual VoLTE.
Shame on you, Samsung. Half year old Huawei Mate 10 Pro is better choice.
Click to expand...
Click to collapse
:good: Confirmed in Exynos : Only 1 SIM at a time for VOLTE while the other on 2G/3G . You can use either one of the Slots for VoLTE
jano7878 said:
Yea, I've just got my S9+ Exynos and I can confirm: when 1st SIM card is connected to LTE/VoLTE service, the second SIM card is connected to 3G network
No Dual Sim Dual VoLTE.
Shame on you, Samsung. Half year old Huawei Mate 10 Pro is better choice.
Click to expand...
Click to collapse
Now we need to wait and see if the Snapdragon version can do it.
Another question, if you disable LTE on SIM 1, can SIM 2 then connect to LTE. Or do you have to swap the SIM cards over?
Crombi said:
Now we need to wait and see if the Snapdragon version can do it.
Another question, if you disable LTE on SIM 1, can SIM 2 then connect to LTE. Or do you have to swap the SIM cards over?
Click to expand...
Click to collapse
US Snapdragon variant is a single SIM model
madnav said:
US Snapdragon variant is a single SIM model
Click to expand...
Click to collapse
I thought there was going to be a Dual SIM Snapdragon too?
Just easy though - *#*#4636#*#* For switching your SIM on data to preferred band @esvlc @madnav @overgonas @jano7878 @Fenny @RossTeagan
v-b-n said:
1 sim can be primary at 4G/VoLTE and other can be only 3G/2G at that time.
Click to expand...
Click to collapse
I second that.
I just received my S9+ (via renewal of my mobile contract) and received a dual sim one (check by inserting two sim cards, it does ask for both pins and let's me choose the sim card to use for calling), although it was never advertised as such.
However, it only shows LTE for the first one.
Considering that the dual-sim version is marketed as specific "Duos" devices, those might differ - but I wouldn't bet on it.
FrozenLord said:
I second that.
I just received my S9+ (via renewal of my mobile contract) and received a dual sim one (check by inserting two sim cards, it does ask for both pins and let's me choose the sim card to use for calling), although it was never advertised as such.
However, it only shows LTE for the first one.
Considering that the dual-sim version is marketed as specific "Duos" devices, those might differ - but I wouldn't bet on it.
Click to expand...
Click to collapse
Can you chose which SIM accesses the LTE or is it only the Sim in slot 1 that can?
Crombi said:
Another question, if you disable LTE on SIM 1, can SIM 2 then connect to LTE. Or do you have to swap the SIM cards over?
Click to expand...
Click to collapse
S8 already can do this. Don't think it's exception on s9
---------- Post added at 03:38 AM ---------- Previous post was at 03:36 AM ----------
Crombi said:
I thought there was going to be a Dual SIM Snapdragon too?
Click to expand...
Click to collapse
China and Hong Kong S9 will be dual SIM SD variant.
kartrikpal said:
Just easy though - *#*#4636#*#* For switching your SIM on data to preferred band @esvlc @madnav @overgonas @jano7878 @Fenny @RossTeagan
Click to expand...
Click to collapse
You can do that within settings itself.
Problem is not with switching Band of Data SIM; but having both SIM work at LTE simultaneously.

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