VoLTE on U Firmware not working ? - T-Mobile Samsung Galaxy S7 Edge Questions & Answer

Hi everyone,
I installed following U firmware on my G935P with T mobile CP from latest G935T firmware. Everything works great (including WiFi calling) but VoLTE is not working. There is option in settings > networks to enable HD voice calling but enabling it doesn't help. I dont have any option for VoLTE prefereed in Phone Menu. I even tried enabling with QuickShortcutMaker to enable VoLTE. but doesn't do anything, I cant see HD logo while making calls or VoLTE symbol.
Country / RegionUSA (T-Mobile)
PDA : G935UUEU4BQH3
Product Code : TMB
CSC : G935UOYM4BQH3
Phone : G935UUEU4BQH3
http://updato.com/firmware-archive-select-model?record=657F3693929911E7963AFA163EE8F90B
Can someone tell me what I am doing wrong ?

You have to flash the T-mobile csc to get volte working I believe.

Is that confirmed? I didn't realize we could mix and match CSCs.
Thanks

VoLTE does not work with the U firmware.
No you cannot use the Tmobile CsC, if you want your phone to boot. You can use the Tmobile radio aka the CP file

bsharp8 said:
You have to flash the T-mobile csc to get volte working I believe.
Click to expand...
Click to collapse
Sorry, But you can not flash another ROM CSC as it contains firmware details. Odin will flash without error, but your phone will not boot. and you will see the broken android error in recovery.
masterhuh said:
Is that confirmed? I didn't realize we could mix and match CSCs.
Thanks
Click to expand...
Click to collapse
As @justda mentioned, No you can not mix and match CSS with different ROM. Only CP files are interchangeable between Snapdragon Models. You should use CP file from your carrier latest firmware to get better signal and more band support.
justda said:
VoLTE does not work with the U firmware.
No you cannot use the Tmobile CsC, if you want your phone to boot. You can use the Tmobile radio aka the CP file
Click to expand...
Click to collapse
I read on some threads where OP mentioned working VoLTE and WiFi calling for At&t, so I thought it should be work for T mobile too. Let me know if anyone has a solution for this problem, I am also in the same boat.
https://forum.xda-developers.com/att-galaxy-s7/how-to/xda-community-love-g930u-t3415875
https://forum.xda-developers.com/att-galaxy-s7/how-to/how-to-flash-firmware-att-volte-video-t3447225

nicsptl said:
Sorry, But you can not flash another ROM CSC as it contains firmware details. Odin will flash without error, but your phone will not boot. and you will see the broken android error in recovery.
As @justda mentioned, No you can not mix and match CSS with different ROM. Only CP files are interchangeable between Snapdragon Models. You should use CP file from your carrier latest firmware to get better signal and more band support.
I read on some threads where OP mentioned working VoLTE and WiFi calling for At&t, so I thought it should be work for T mobile too. Let me know if anyone has a solution for this problem, I am also in the same boat.
https://forum.xda-developers.com/att-galaxy-s7/how-to/xda-community-love-g930u-t3415875
https://forum.xda-developers.com/att-galaxy-s7/how-to/how-to-flash-firmware-att-volte-video-t3447225
Click to expand...
Click to collapse
My apologies to everyone. Thanks for correcting me before someone screwed their phone up. :good:

Just out of curiosity. Did anyone use 935U firmware, but XAA instead of TMB? For me, with XAA, VoLTE and wifi calling worked out of the box as soon as I inserted my T-Mobile SIM.

walrusmonarch said:
Just out of curiosity. Did anyone use 935U firmware, but XAA instead of TMB? For me, with XAA, VoLTE and wifi calling worked out of the box as soon as I inserted my T-Mobile SIM.
Click to expand...
Click to collapse
Flashing latest U firmware with T mobile CP fixed issue for me. I can confirm VoLTE for t mobile works on U firmware out-of-box with or without T mobile CP(radio). @walrusmonarch thanks until now my phone was on U firmware with July security patch. Not sure why it was not working, it's a used phone and the previous owner also made some rom related changes .
Btw, As per my knowledge, both firmware contains the same MULTI-CSC
(i.e. "CSC_OYM_G935UOYM4BQH3_CL12006533_QB14665430_REV02_user_low_ship_MULTI_CERT"). As per sim card inserted during first boot the phone will reset CSC code to match carrier. In my case, it will automatically switch to TMB, even if I use U firm with XAA default code as it contains the same AP, CP, BL and multi-csc file. correct me if I am wrong.

Related

Is it possible to ROM 935F with t-mobile ROM?

I am looking to buy one of the international models with the Samsung CPU, but plan on using the phone on T-mobile's network and would really like to use wi-fi calling. Is it possible to use a rooted t-mobile ROM on this phone?
[email protected] said:
I am looking to buy one of the international models with the Samsung CPU, but plan on using the phone on T-mobile's network and would really like to use wi-fi calling. Is it possible to use a rooted t-mobile ROM on this phone?
Click to expand...
Click to collapse
The issue with that is, the international variant is Exynos (which is better, may I add ) and I think the T-Mobile (USA) variant is Snapdragon.
Because of the architecture you probably can't use just use a T-Mobile stock ROM but there might be some sort of tweaking you can do to get it working. I am from the UK and my carrier is EE which supports WiFi calling, so you might be able to start with something like that.
If you root the phone, you can flash the tmobile csc from the universal csc file (get the note 7 csc if you use a n7 port). With it, I have WiFi calling, volte including video call.
rp3 said:
If you root the phone, you can flash the tmobile csc from the universal csc file (get the note 7 csc if you use a n7 port). With it, I have WiFi calling, volte including video call.
Click to expand...
Click to collapse
CAN u provide link to the flashing of csc. Funny thing is that someone posted a sm935f on ebay and they mentioned that they messed up the csc flash. Is there a way to fix a messed up csc flash?
wphend00 said:
CAN u provide link to the flashing of csc. Funny thing is that someone posted a sm935f on ebay and they mentioned that they messed up the csc flash. Is there a way to fix a messed up csc flash?
Click to expand...
Click to collapse
CSC for S7 based Roms
http://forum.xda-developers.com/s7-edge/development/utility-flashable-csc-selection-30-t3392957
CSC for N7 Based rom (I personally use this rom: http://forum.xda-developers.com/s7-edge/development/rom-n7-rom-port-romcontrol-t3430358)
http://forum.xda-developers.com/note-7/development/utility-flashable-csc-selection-v1-0-t3450911 -- Choose the second download (ported snapdragon)
Fixing bad flash:
http://forum.xda-developers.com/s7-edge/how-to/guide-how-to-fix-check-drk-imei-issues-t3379516
No guarantees this will work.

Has anyone got WiFi Calling to work on a 935FD dual Sim

OK, I flashed my G935FD dual sim with G935FXXU1BPH6_G935FVFG1BPH1_VOD ( I did AP BL CP CSC), it rebooted did a couple of OTA updates, has wifi calling enable, but still wont wifi call, or go into wifi calling mode.
After the flash and OTA's I checked the versions and have :
AP G935FXXS1BPJ1
CP G935FXXU1BPHJ
CSC G935FVFG1BPH1
this is exactly the same as my UK Vod shop purchased G935 single sim, which obviously does go into wifi calling mode
One minor point, my G935FD dual sim phone receives messages dfrom VOD after a sim change stating auto configuration of APN is not possible, is VOD UK still detecting my dual sim device and disabling wifi calling
any ideas anyone pls, has anyone got WiFi Calling to work on 935FD for Vodafone?
cheers
(oh, also tried G935FXXS1BPJ1_G935FDBT1BPH2_DBT.zip and didnt even have the wifi calling check box )
I have mine working on the att version
VissGaming said:
I have mine working on the att version
Click to expand...
Click to collapse
cool, I have heard from other ATT or UK EE users who have made this work easily, just no vodafone users
update here from me :
Having tried many roms, with no success, I reverted back to a UK VOD ROM, as this was a multi CSC ROM, which defaulted to VOD2 CSC (Germany I think), I rooted the device and changed the CSC to VFG (VOD UK I believe)
Still no wifi calling, though it is enabled in the CSC and onmy account I dont have the check box under phone settings -and have no idea how to force it to appear.
Any ideas pls, has anyone successfully got WiFi Calling to work for Vodafone (UK ??) on a 935FD ?
surfnsnack said:
cool, I have heard from other ATT or UK EE users who have made this work easily, just no vodafone users
Click to expand...
Click to collapse
I am interested in getting a dual sim version of the s7 edge to use with EE in the UK. Could you please elaborate on compatibility with EE's wifi calling? Did you read about it in some forum? Do you know people who have tried it? Do you know exactly which versions are compatible (935FD, 930 , etc)? Thanks!
surfnsnack said:
OK, I flashed my G935FD dual sim with G935FXXU1BPH6_G935FVFG1BPH1_VOD
Click to expand...
Click to collapse
So you flashed a single-sim firmware (for G935F) onto a dual sim phone (G935FD) and it worked? Did you retain dual sim functionality?
cdl2 said:
So you flashed a single-sim firmware (for G935F) onto a dual sim phone (G935FD) and it worked? Did you retain dual sim functionality?
Click to expand...
Click to collapse
Yes flashing firmware for the G935F retains Dual SIM functionality, mine is flashed with the BTU firmware as UK s7 version
@copex , thanks! Are you on EE? Have you had a chance to verify if wifi calling works?
Also, is there any particular way to flash the firmware with Odin? Or shall I just follow one of the many guides on the web?
I don't need to be rooted, right? I don't want to root because otherwise I won't have access to my work email.
cdl2 said:
@copex , thanks! Are you on EE? Have you had a chance to verify if wifi calling works?
Also, is there any particular way to flash the firmware with Odin? Or shall I just follow one of the many guides on the web?
I don't need to be rooted, right? I don't want to root because otherwise I won't have access to my work email.
Click to expand...
Click to collapse
I am on EE but via Plusnet mobile and they do not support wifi calling, i used Odin to flash the device as i changed the CSC to BTU i done a full wipe so i could get OTA updates, i followed the info here.
https://forum.xda-developers.com/s7-edge/how-to/official-stock-firmware-update-odin-t3335065
i used SamFirm_v0.3.6 to download the uk firmware
copex said:
i used Odin to flash the device as i changed the CSC to BTU i done a full wipe so i could get OTA updates, i followed the info here.
https://forum.xda-developers.com/s7-edge/how-to/official-stock-firmware-update-odin-t3335065
Click to expand...
Click to collapse
What do you mean exactly when you say you changed the CSC? When you ran Odin, did you load all 4 files: BL, AP, CP, CSC ? Specifically, did you load the CSC file or the Home_CSC file in the CSC box?
Thanks a lot!
On a different note, where were you able to buy a dual sim s8?... all the ones on Amazon come with a clear "no Warranty" disclaimer.
I am not sure dual sim S8s are out yet - we were talking about the s7 edge. These dual sim phones can typically be bought in countries like the United Arab Emirates or Hong Kong, or on ebay, but if you buy from there and bring the phone to Europe or the US it basically means no warranty. There are also lots of small websites that sell them, but I wouldn't even consider them unless they support the paypal guarantee - who are you going to sue if they don't send you your phone?
cdl2 said:
What do you mean exactly when you say you changed the CSC? When you ran Odin, did you load all 4 files: BL, AP, CP, CSC ? Specifically, did you load the CSC file or the Home_CSC file in the CSC box?
Thanks a lot!
Click to expand...
Click to collapse
when you download the BTU firmware there are two CSC files one will allow the phone to update and keep the data and the other will wipe the phone and you will lose all of your data, when you change the CSC region you have to do a full wipe to get OTA updates, if you upgrade the OTA updates will stop if the CSC region is changed
you have to flash all 4 files.
the csc file i flashed was CSC_BTU_G935FBTU..................................... if i remember correctly the CSC_HOME............... is the one that updates the phone

SM-935V

I would like to know if it's possible to flash the firmware for
T-mobile I'm looking to leave verizon I know that the Verizon variant does not have 2 of the lte bands that T-mobile uses can I use Odin to Flash the 935t firmware to get the band's or am I asking something that is not possible. Thanks in advance
Rich7591110 said:
I would like to know if it's possible to flash the firmware for
T-mobile I'm looking to leave verizon I know that the Verizon variant does not have 2 of the lte bands that T-mobile uses can I use Odin to Flash the 935t firmware to get the band's or am I asking something that is not possible. Thanks in advance
Click to expand...
Click to collapse
The answer is NO you're asking firmware to replace/add hardware and that's not possible
I have a Verizon branded s7 edge and used Odin to load the 935U PI3 firmware. I am on T-Mo now and do have LTE band 12 working (validated with LTE Discovery). The research that I did found that the US variants have all the radios in them, but some carrier variants of firmware disable certain bands. By doing the 935U firmware, I also got rid of the notice on every reboot that I was using a non-Verizon SIM. So I now have all T-mo bands and no stupid SIM message.
Rich7591110 said:
I would like to know if it's possible to flash the firmware for
T-mobile I'm looking to leave verizon I know that the Verizon variant does not have 2 of the lte bands that T-mobile uses can I use Odin to Flash the 935t firmware to get the band's or am I asking something that is not possible. Thanks in advance
Click to expand...
Click to collapse
I can vouch for same experience as SF-IT guy. I bought a G935V and flashed with G935U firmware via odin. Works on T-mobile, even wifi calling works. Currently on the latest PI3 version of G935U firmware. I would that you search the forum to see if you can flash the G935T firmware directly. The only downside of using G935U firmware is that the FM radio chip is not enabled in the firmware. I read that the all the carrier versions (September security patch and newer) of the G935 firmware have the FM radio chip enabled. I prefer the 935U version because it there is not carrier bloatware. Samsung bloatware is still there.
davekung said:
I can vouch for same experience as SF-IT guy. I bought a G935V and flashed with G935U firmware via odin. Works on T-mobile, even wifi calling works. Currently on the latest PI3 version of G935U firmware. I would that you search the forum to see if you can flash the G935T firmware directly. The only downside of using G935U firmware is that the FM radio chip is not enabled in the firmware. I read that the all the carrier versions (September security patch and newer) of the G935 firmware have the FM radio chip enabled. I prefer the 935U version because it there is not carrier bloatware. Samsung bloatware is still there.
Click to expand...
Click to collapse
So what would the FM radio chip do? Just enable FM radios is all? Because if that's the downside then it's not a major setback as not too many people use the FM radio.
I don't think you can
cyoo97 said:
I don't think you can
Click to expand...
Click to collapse
You definitely can. All US versions of the S7 & S7 Edge are the same hardware and can be flashed to any other US firmware. (including the U firmware that automatically works on all 4 carriers)
andrewNY said:
You definitely can. All US versions of the S7 & S7 Edge are the same hardware and can be flashed to any other US firmware. (including the U firmware that automatically works on all 4 carriers)
Click to expand...
Click to collapse
So what you're saying is that flashing the U version firmware will unlock by default all 930"X" and 935"X" phones? As in it just unlocks the mofo and debloats some while you're at it?
What's the catch? It seems too easy
Tin_Man_0 said:
So what you're saying is that flashing the U version firmware will unlock by default all 930"X" and 935"X" phones? As in it just unlocks the mofo and debloats some while you're at it?
What's the catch?
Click to expand...
Click to collapse
Bloat is definitely gone on the U firmware, which is great. My phone runs faster and has more free space too.
I think some carrier features aren't supported on the U firmware. On T-mobile everything works (VoLTE and Wi-Fi Calling), but I think AT&T might have some issues with those.
If the phone is SIM locked to a particular carrier, I'm not sure that automatically gets turned off or not when you switch to the U firmware. You might need to contact your carrier first to get an unlock code?
andrewNY said:
Bloat is definitely gone on the U firmware, which is great. My phone runs faster and has more free space too.
I think some carrier features aren't supported on the U firmware. On T-mobile everything works (VoLTE and Wi-Fi Calling), but I think AT&T might have some issues with those.
If the phone is SIM locked to a particular carrier, I'm not sure that automatically gets turned off or not when you switch to the U firmware. You might need to contact your carrier first to get an unlock code?
Click to expand...
Click to collapse
What if I got a temporary unlock from t-mobile unlock app and then flashed this firmware? Would it make it permanent? Seems quite possible, but I don't know if the temporary unlock actually unlocks the phone or just inserts a bypass that would disappear if flashed.
andrewNY said:
Bloat is definitely gone on the U firmware, which is great. My phone runs faster and has more free space too.
I think some carrier features aren't supported on the U firmware. On T-mobile everything works (VoLTE and Wi-Fi Calling), but I think AT&T might have some issues with those.
If the phone is SIM locked to a particular carrier, I'm not sure that automatically gets turned off or not when you switch to the U firmware. You might need to contact your carrier first to get an unlock code?
Click to expand...
Click to collapse
I unlocked my US TMo phone when stock, rooted, and am running Echoe - which has a glitch where WiFi calling sort of works (can receive calls but not make them). In the TMo forum, there are threads on U - your comments here are more specific to what I am interested.
Which U firmware are you on and are you rooted (is is updated to latest v4 bootloader version), and did you have to ODIN and full wipe with CSC or did you get by with CSC Home to preserve data?
Also, are you on U CP or did you flash TMo CP to get all the bands?.
.
duplicate - XDA burped
Thanks everyone

How to get VoLTE on s7 edge G935U , for Indian Network Jio4G

I need to use VoLTE servie on my s7 edge G35U , but its not the option I am getting easily. I need to use the Jio4G service, but I dont have that option on my G935U (single sim) Global variant. I could have flashed the Indian INS firmware, but the issue is, indian version is Exyons veriant and the U one is running with the snapdragon, also the indian one is a G935FD (dusl sim). So, I cant flah the Indian firmware. So, what are all the avilable options for me to get the VoLTE working on my G935U ?
I have tried the T-Mobile (G935T), Version (G935V) frimware which support VoLTE for US carriers, but it wont work for Jio4G network.
So, the doubt is can I flash the U frimware with the Indian Firmwares CSC and check for the VoLTE support? will the exynos vartiants CSC (G935FD) works on snapdragon (G935U) ones?
Or is there any particular solution for getting VoLTE? Eagerly waiting for a resolution, please help me!.
kiranhdg said:
I need to use VoLTE servie on my s7 edge G35U , but its not the option I am getting easily. I need to use the Jio4G service, but I dont have that option on my G935U (single sim) Global variant. I could have flashed the Indian INS firmware, but the issue is, indian version is Exyons veriant and the U one is running with the snapdragon, also the indian one is a G935FD (dusl sim). So, I cant flah the Indian firmware. So, what are all the avilable options for me to get the VoLTE working on my G935U ?
I have tried the T-Mobile (G935T), Version (G935V) frimware which support VoLTE for US carriers, but it wont work for Jio4G network.
So, the doubt is can I flash the U frimware with the Indian Firmwares CSC and check for the VoLTE support? will the exynos vartiants CSC (G935FD) works on snapdragon (G935U) ones?
Or is there any particular solution for getting VoLTE? Eagerly waiting for a resolution, please help me!.
Click to expand...
Click to collapse
Hey, I am also struck with the same.. I am using Jio4G service. Why could not you use that? I can help. Coming to the CSC, someone has to modify the 935U firmware CSC with INS/INU, until then we can not use it. I have tried to flash 935FD CSC along with other AP,PD etc of 935U through ODIN but it failed. ( T-Mobile and verizon firmware does not work as they had their respective CSC codes and also 935U has all US CSC codes)
satish.yarramsetti said:
Hey, I am also struck with the same.. I am using Jio4G service. Why could not you use that? I can help. Coming to the CSC, someone has to modify the 935U firmware CSC with INS/INU, until then we can not use it. I have tried to flash 935FD CSC along with other AP,PD etc of 935U through ODIN but it failed. ( T-Mobile and verizon firmware does not work as they had their respective CSC codes and also 935U has all US CSC codes)
Click to expand...
Click to collapse
Yes, I am currently using the Jio4GVoice app, but still it's not stable to work flawlessly... also the device is supported but.. without proper software it's not working. So, I hope someone has a solution or any developer could help us with this. What to do?... How to modify the CSC to work with this U device.
kiranhdg said:
I need to use VoLTE servie on my s7 edge G35U , but its not the option I am getting easily. I need to use the Jio4G service, but I dont have that option on my G935U (single sim) Global variant. I could have flashed the Indian INS firmware, but the issue is, indian version is Exyons veriant and the U one is running with the snapdragon, also the indian one is a G935FD (dusl sim). So, I cant flah the Indian firmware. So, what are all the avilable options for me to get the VoLTE working on my G935U ?
I have tried the T-Mobile (G935T), Version (G935V) frimware which support VoLTE for US carriers, but it wont work for Jio4G network.
So, the doubt is can I flash the U frimware with the Indian Firmwares CSC and check for the VoLTE support? will the exynos vartiants CSC (G935FD) works on snapdragon (G935U) ones?
Or is there any particular solution for getting VoLTE? Eagerly waiting for a resolution, please help me!.
Click to expand...
Click to collapse
satish.yarramsetti said:
Hey, I am also struck with the same.. I am using Jio4G service. Why could not you use that? I can help. Coming to the CSC, someone has to modify the 935U firmware CSC with INS/INU, until then we can not use it. I have tried to flash 935FD CSC along with other AP,PD etc of 935U through ODIN but it failed. ( T-Mobile and verizon firmware does not work as they had their respective CSC codes and also 935U has all US CSC codes)
Click to expand...
Click to collapse
kiranhdg said:
Yes, I am currently using the Jio4GVoice app, but still it's not stable to work flawlessly... also the device is supported but.. without proper software it's not working. So, I hope someone has a solution or any developer could help us with this. What to do?... How to modify the CSC to work with this U device.
Click to expand...
Click to collapse
Any solution yet?
I have a similar problem with my TMobile s7 edge. Im able to use Jio Internet services, however calling doesn't work!!
S7 Edge said:
Any solution yet?
I have a similar problem with my TMobile s7 edge. Im able to use Jio Internet services, however calling doesn't work!!
Click to expand...
Click to collapse
No, Unfortunately not yet. None of the xda developers are helping on this.. at least if something is guided.. on what to be done for fixing this issue would help.. Can anyone help solve this??
kiranhdg said:
No, Unfortunately not yet. None of the xda developers are helping on this.. at least if something is guided.. on what to be done for fixing this issue would help.. Can anyone help solve this??
Click to expand...
Click to collapse
Okay. While we awaiting someone's attention - let me run this thought by you.
Firstly, Im new to the android world, firmware, rooting, etc... However with the limited googling done, I wanted to check if this will work.
What if we root our phone and disable/uninstall the RCS application (in my case it would be TMobile) and then that will allow Jio to act as RCS App??
S7 Edge said:
Okay. While we awaiting someone's attention - let me run this thought by you.
Firstly, Im new to the android world, firmware, rooting, etc... However with the limited googling done, I wanted to check if this will work.
What if we root our phone and disable/uninstall the RCS application (in my case it would be TMobile) and then that will allow Jio to act as RCS App??
Click to expand...
Click to collapse
If you are having issues in using the Jio4GVoice Applicatiom. Just install the G935U Firmware so that both data and calls work. Though VoLTE is not there, the Jio4GVoice Application will work and also all bands are unlocked in G935U , you can also select specific bands of Jio. Only thing is VoLTE is missing in G935U , maybe someone can get that feature... hoping for best
I'm pretty sure you need to change CSC to your region. Give that a shot and post back your results. I know the SM-G935U can't flash kernels because it is boot-loader locked, but I'm sure you can flash system and csc via flashfire and odin. So tinker with it see what you come up with.
travis82 said:
I'm pretty sure you need to change CSC to your region. Give that a shot and post back your results. I know the SM-G935U can't flash kernels because it is boot-loader locked, but I'm sure you can flash system and csc via flashfire and odin. So tinker with it see what you come up with.
Click to expand...
Click to collapse
Do i have to download sm 935u t mobile? Sorry to ask stupid questions, bt im new to all of this!! Im using tmobile unlocked
kiranhdg said:
If you are having issues in using the Jio4GVoice Applicatiom. Just install the G935U Firmware so that both data and calls work. Though VoLTE is not there, the Jio4GVoice Application will work and also all bands are unlocked in G935U , you can also select specific bands of Jio. Only thing is VoLTE is missing in G935U , maybe someone can get that feature... hoping for best
Click to expand...
Click to collapse
@kiranhdg - I flashed my phone with 935U and I am able to use the Jio App, cannot make calls or Text via the regular dialer. Now, If i wanna get back on the 935T which did have the VoLTE, do i just flash the it with that firmware, or I can never revert the phone?? Thanks for your help though!!
download the tmobile firmware and flash it back. No big deal.
S7 Edge said:
@kiranhdg - I flashed my phone with 935U and I am able to use the Jio App, cannot make calls or Text via the regular dialer. Now, If i wanna get back on the 935T which did have the VoLTE, do i just flash the it with that firmware, or I can never revert the phone?? Thanks for your help though!!
Click to expand...
Click to collapse
If you want 935T back again, flash the latest version of the 935T firmware. That's it, but even having the VoLTE on T doesn't help with Jio.
No solutions yet.. I am using jiovoice app for the time being..
You need hyour own carrier CSC file for VoLTE etc. But using your own CSC with the BTU nougat ROM breaks things, and cannot be used. You need to wait for your carrier to update.
azoksky said:
No solutions yet.. I am using jiovoice app for the time being..
Click to expand...
Click to collapse
Is there really going to b a solution to this
!!
S7 Edge said:
Is there really going to b a solution to this
!!
Click to expand...
Click to collapse
Any updates on this? I am in the same boat now. I have SM-G935U with me and it is not working with jio.
srekar said:
Any updates on this? I am in the same boat now. I have SM-G935U with me and it is not working with jio.
Click to expand...
Click to collapse
It's not possible bro. U can only do this if u have exynos version bought in any country. U,T,A,P,V models have Snapdragon version.
When it is come to Samsung, They maintain regional settings in CSC file which has all these regional settings like volte, APN etc . These CSC file made for exynos won't work on Snapdragon.
I have tried many combinations earlier, flashing snapdragon firmware and Exynos CSC but doesn't workout. I have 935U earlier and tried all these and sold my phone.
We also can't Unlock bootloader for Snapdragon Version and Can't even achieved proper root. SO Volte is not possible.
satish.yarramsetti said:
It's not possible bro. U can only do this if u have exynos version bought in any country. U,T,A,P,V models have Snapdragon version.
When it is come to Samsung, They maintain regional settings in CSC file which has all these regional settings like volte, APN etc . These CSC file made for exynos won't work on Snapdragon.
I have tried many combinations earlier, flashing snapdragon firmware and Exynos CSC but doesn't workout. I have 935U earlier and tried all these and sold my phone.
We also can't Unlock bootloader for Snapdragon Version and Can't even achieved proper root. SO Volte is not possible.
Click to expand...
Click to collapse
Thanks for confirming. I think I need to find a buyer for my 935U now
srekar said:
Thanks for confirming. I think I need to find a buyer for my 935U now
Click to expand...
Click to collapse
Yeah as soon as possible. Airtel will be launching VolTE very soon. People will for ask for that.
srekar said:
Thanks for confirming. I think I need to find a buyer for my 935U now
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Click to collapse
Do you still have device? Please let me know. I have one work around to get VOLTE on my device
We can try same on S7.

EVR to BTU

Hi,
I'm looking at changing the firmware on my S7 EDGE from EVR to BTU.
How do I ensure I keep the data on my phone? Will OTA work properly on it when I flash the firmware?
chrissyyyw said:
Hi,
I'm looking at changing the firmware on my S7 EDGE from EVR to BTU.
How do I ensure I keep the data on my phone? Will OTA work properly on it when I flash the firmware?
Click to expand...
Click to collapse
Here you go
https://forum.xda-developers.com/s7-edge/help/change-csc-install-version-via-odin-t3374582
So if I use home csc I can't use OTA?
How do I retain the EE WiFi calling option?
chrissyyyw said:
So if I use home csc I can't use OTA?
How do I retain the EE WiFi calling option?
Click to expand...
Click to collapse
You cannot update via OTA when changing to a different firmware unless it is EVR firmware. If you flash CSC then you can get OTA updates.
The only way to retain the EE Wifi calling is to remain on EVR firmware.
I thought the WiFi calling option worked on BTU but Volte did not?
chrissyyyw said:
So if I use home csc I can't use OTA?
How do I retain the EE WiFi calling option?
Click to expand...
Click to collapse
I'm from xsg CSC, I flashed mm via Odin with BTU firmware and home_csc also from BTU firmware. I registered to beta programme and got update, now I'm on stable nougat.
★hasibgns★
Was the update using OTA?
chrissyyyw said:
I thought the WiFi calling option worked on BTU but Volte did not?
Click to expand...
Click to collapse
I have BTU factory unlocked and unbranded device and I can confirm wifi calling works on EE. Just enable it in the settings.
I debranded mine from Virgin UK to BTU, I have no wifi calling options although it doesn't bother me as I don't use it anyway.
lyriquidperfection said:
I have BTU factory unlocked and unbranded device and I can confirm wifi calling works on EE. Just enable it in the settings.
Click to expand...
Click to collapse
Which firmware are you running G935FXXU1BPLB??
When flashing from EVR to BTU, what items should be selected?
BL, AP, CP, CSC (or CSC home)? I'm not fussed about VoLTE as EE keep having outages, however I do need WiFi calling. I tried flashing Nougat last night and selected BL, AP, CP and CSC but WiFi calling option was gone from settings
Thank you
red_snow said:
When flashing from EVR to BTU, what items should be selected?
BL, AP, CP, CSC (or CSC home)? I'm not fussed about VoLTE as EE keep having outages, however I do need WiFi calling. I tried flashing Nougat last night and selected BL, AP, CP and CSC but WiFi calling option was gone from settings
Thank you
Click to expand...
Click to collapse
I have recently flashed the BTU Nougat firmware and can confirm that I am able to use WiFi calling on EE
Flash AP, CP, BL & CSC (or CSC_HOME if you want to retain data but may cause some issues)
Wonderful, thanks for confirming. I've downloaded BTU 7.0 and EVR 6.0.1 from sammobile so I guess my steps are:
1. Full backup of my S7 Edge (EVR 6.0.1) with Smart Switch
2. Remove SD card
3. Flash BTU with BL, AP, CP and CSC
4. Full reset/erase
5. Test WiFi calling, presume it's in the dialler settings still
6. Restore data/apps with Smart Switch
7. Check for any OS/App updates
8. Have a cider
Sound good?
BTW, when I last had a go at flashing BTU 7, there was no WiFi calling in the dialler settings Hopefully it'll work this time and at some point, EE will allow VoLTE (if IMS doesn't keep falling over).
Cheers
I can't find any WiFi calling options in settings on BTU 7 which I flashed over my EVR.
Interesting, that is why I'm reluctant to do it again. I've heard it work for some and others say flash with BTU 6.0.1 and then OTA to 7.0
Not that WiFi calling matters again now as EE have yet another IMS issue, no WiFi calling or VoLTE ....... AGAIN!
red_snow said:
Interesting, that is why I'm reluctant to do it again. I've heard it work for some and others say flash with BTU 6.0.1 and then OTA to 7.0
Not that WiFi calling matters again now as EE have yet another IMS issue, no WiFi calling or VoLTE ....... AGAIN!
Click to expand...
Click to collapse
What is this IMS issue you're talking about?
Anyways, I've had VoLTE working since the Nougat ODIN files became available.
Flash official Nougat files + BETA 1 CSC (Nougat OXA) and Wi-Fi Calling and VoLTE works fine.
The IMS (IP Multimedia Subsystem) is the tech stack that allows for VoLTE and WiFi calling over 4G.
Regarding your method of retaining VoLTE/WiFi calling, I like it. Where can I download the beta firmware from in terms of a reputable site?
Incidentally, do you know which beta version stopped VoLTE on EE?
red_snow said:
Wonderful, thanks for confirming. I've downloaded BTU 7.0 and EVR 6.0.1 from sammobile so I guess my steps are:
1. Full backup of my S7 Edge (EVR 6.0.1) with Smart Switch
2. Remove SD card
3. Flash BTU with BL, AP, CP and CSC
4. Full reset/erase
5. Test WiFi calling, presume it's in the dialler settings still
6. Restore data/apps with Smart Switch
7. Check for any OS/App updates
8. Have a cider
Sound good?
BTW, when I last had a go at flashing BTU 7, there was no WiFi calling in the dialler settings Hopefully it'll work this time and at some point, EE will allow VoLTE (if IMS doesn't keep falling over).
Cheers
Click to expand...
Click to collapse
Sounds good, but I'd change step 8 to a lager!
red_snow said:
The IMS (IP Multimedia Subsystem) is the tech stack that allows for VoLTE and WiFi calling over 4G.
Regarding your method of retaining VoLTE/WiFi calling, I like it. Where can I download the beta firmware from in terms of a reputable site?
Incidentally, do you know which beta version stopped VoLTE on EE?
Click to expand...
Click to collapse
I flashed the latest official BTU firmware with Odin and have been using WiFi calling for 24 hours without a hitch.
The firmware can be downloaded HERE
CuBz90 said:
Sounds good, but I'd change step 8 to a lager!
I flashed the latest official BTU firmware with Odin and have been using WiFi calling for 24 hours without a hitch.
The firmware can be downloaded HERE
Click to expand...
Click to collapse
Where is the option for it in settings!?
Chris_c81 said:
Where is the option for it in settings!?
Click to expand...
Click to collapse
Open Phone app > Settings > Scroll right to bottom to find wifi calling

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