AT&T Wifi Calling on ROOTED T-Mobile S5 - Galaxy S 5 Q&A, Help & Troubleshooting

Hi,
I recently bought a T-Mobile S5 (SM-G900T). It's unlocked and I rooted and de-bloated the stock marshmallow ROM. The phone works wonderfully and it was nice getting a brand new phone that meets all my criteria (runs Google Maps fine, removable battery, SD Card, rootable) for under $150.
I use AT&T for my service. I'm wondering if anyone can tell me how to get AT&T Wifi calling working on this phone. The phone is rooted so I'm sure it's definitely possible with enough work but I'd like to know if anyone has already done this.
Thank you.
PS: please don't ask why I didn't get an SM-G900A. I didn't and what's done is done. Return/exchange period is over

If your on ATT prepaid as I am, same phone, they do not support it, only post paid can use that service. Was just at ATT store changing a battery and asked while there.

shellcode said:
Hi, I recently bought a T-Mobile S5 (SM-G900T). It's unlocked and I rooted and de-bloated the stock marshmallow ROM...
Click to expand...
Click to collapse
I don't have this variant myself but, you have a few options.
You can try looking at the following threads/link that's specific to your device for some of those options...
https://forum.xda-developers.com/showthread.php?t=2800402
https://forum.xda-developers.com/showthread.php?t=3736650
https://forum.xda-developers.com/showthread.php?t=2723817
https://forum.xda-developers.com/showthread.php?t=2770849
https://forums.androidcentral.com/t-mobile/421217-wifi-calling.html
... or you could use some type of VoIP (Voice over IP) or SIP (Session Initiation Protocol) app.
Here's a few links to help you with this option.
https://www.androidauthority.com/be...p-calls-wi-fi-calling-internet-calling-87396/
http://www.toptenreviews.com/services/articles/best-voip-app-apple-android/
I don't use any of the above myself but, those would be a good start for you...
Good Luck!
~~~~~~~~~~~~~~~
I DO NOT provide support via PM unless asked/requested by myself. PLEASE keep it in the threads where everyone can share.

ahvamaria said:
If your on ATT prepaid as I am, same phone, they do not support it, only post paid can use that service. Was just at ATT store changing a battery and asked while there.
Click to expand...
Click to collapse
I am on a post-paid family plan. Wifi calling is definitely supported. I've used it on other AT&T devices.

Ibuprophen said:
I don't have this variant myself but, you have a few options.
You can try looking at the following threads/link that's specific to your device for some of those options...
https://forum.xda-developers.com/showthread.php?t=2800402
https://forum.xda-developers.com/showthread.php?t=3736650
https://forum.xda-developers.com/showthread.php?t=2723817
https://forum.xda-developers.com/showthread.php?t=2770849
https://forums.androidcentral.com/t-mobile/421217-wifi-calling.html
... or you could use some type of VoIP (Voice over IP) or SIP (Session Initiation Protocol) app.
Here's a few links to help you with this option.
https://www.androidauthority.com/be...p-calls-wi-fi-calling-internet-calling-87396/
http://www.toptenreviews.com/services/articles/best-voip-app-apple-android/
I don't use any of the above myself but, those would be a good start for you...
Good Luck!
~~~~~~~~~~~~~~~
I DO NOT provide support via PM unless asked/requested by myself. PLEASE keep it in the threads where everyone can share.
Click to expand...
Click to collapse
Thanks but I don't see any mention of AT&T Wifi calling on any of those T-Mobile ROMs. Maybe I missed something? In either case, I'd prefer not to switch ROMs but I could use it to see what was done to make AT&T Wifi calling work.
I'm not actually interested in phone calls with wifi calling. I want to receive text messages at work where I have no signal.

shellcode said:
Thanks but I don't see any mention of AT&T Wifi calling on any of those T-Mobile ROMs. Maybe I missed something? In either case, I'd prefer not to switch ROMs but I could use it to see what was done to make AT&T Wifi calling work.
I'm not actually interested in phone calls with wifi calling. I want to receive text messages at work where I have no signal.
Click to expand...
Click to collapse
When you say you'd prefer not to switch ROMs, is it because you prefer running the stock / official ROM? Or is it because you don't want to go through the process?
The US Snapdragon variants of the S5 have the same hardware, they're just tuned differently via the EFS/modem settings and run different firmware images based on carrier. You can run a different carrier firmware on your device just fine. I recently completed a switch over on a SM-G900P (Sprint variant) to the SM-G900T (T-Mobile) software. All T-Mobile specific features, including Wi-Fi Calling, are functional as if it was a T-Mobile variant.
What I'm proposing is, if you like the stock software, you can have it, with AT&T features instead of T-Mobile. It'll function exactly as if it were an AT&T variant, purchased as such, rather than as a T-Mobile variant.
The process I used should be applicable to any Snapdragon variant, however. As I had to figure out much of this process for myself, there's no guides or information out there presently. But if you'd like, I could help you through the process.

Moved to Q&A

Arbiter said:
When you say you'd prefer not to switch ROMs, is it because you prefer running the stock / official ROM? Or is it because you don't want to go through the process?
The US Snapdragon variants of the S5 have the same hardware, they're just tuned differently via the EFS/modem settings and run different firmware images based on carrier. You can run a different carrier firmware on your device just fine. I recently completed a switch over on a SM-G900P (Sprint variant) to the SM-G900T (T-Mobile) software. All T-Mobile specific features, including Wi-Fi Calling, are functional as if it was a T-Mobile variant.
What I'm proposing is, if you like the stock software, you can have it, with AT&T features instead of T-Mobile. It'll function exactly as if it were an AT&T variant, purchased as such, rather than as a T-Mobile variant.
The process I used should be applicable to any Snapdragon variant, however. As I had to figure out much of this process for myself, there's no guides or information out there presently. But if you'd like, I could help you through the process.
Click to expand...
Click to collapse
Now, there's an interesting suggestion! Are you saying I can get the SM-G900A firmware from sammobile (or some other source) and just ODIN flash that to my SM-G900T? If so, that would give me AT&T wifi-calling. I was under the impression that there were hardware differences and that you couldn't flash firmware from one variant to another or you'd end up with a brick. I guess that's not true?
I don't particularly *like* the stock firmware but I just want something that will work well with the least amount of tweaking. I'll de-bloat myself it but top speed is not as much of a priority as battery life and all phone functions (camera, bluetooth) working as it did from the factory. So, (debloated) stock is good enough for me.
Thanks!

shellcode said:
Now, there's an interesting suggestion! Are you saying I can get the SM-G900A firmware from sammobile (or some other source) and just ODIN flash that to my SM-G900T? If so, that would give me AT&T wifi-calling. I was under the impression that there were hardware differences and that you couldn't flash firmware from one variant to another or you'd end up with a brick. I guess that's not true?
I don't particularly *like* the stock firmware but I just want something that will work well with the least amount of tweaking. I'll de-bloat myself it but top speed is not as much of a priority as battery life and all phone functions (camera, bluetooth) working as it did from the factory. So, (debloated) stock is good enough for me.
Thanks!
Click to expand...
Click to collapse
Well, any stock firmware is as close to factory functionality as possible. When switching carrier firmware, you gain the features of the target firmware, without any bugs or other problems.
You do have to take care in doing it correctly. It's not meant to be done on an S5, and there's no documented method out there, such as Prince Comsy's Odin for the S7, for example. Also in regards to that, the flash is not done via Odin. There's some parts which require it, however, there's no way to flash a full other carrier firmware via Odin on an S5, as far as I know. The device bootloader rejects the firmware due to a software check failure.
That aside, if done correctly, it functions identically to the desired firmware variant in my testing.
There are only two things you need to concern yourself with. The first is whether your device presently has the proper frequencies activated in its EFS configuration. If not, you won't receive coverage where the bands used aren't active on your phone. If this is a problem, it is possible to manually activate additional frequencies via QPST and QXDM. You may also desire to do this anyways, for increased roaming compatibility and coverage. This is another thing you have to be careful while doing, however.
The second thing to consider, is whether you care about OTA updates. Or more precisely, that you won't be able to use them. This is arguably of little consequence, as its unlikely anymore updates will be released for the S5. But if there is an update, you'll have to apply it manually by the same process used to convert your firmware variant. If you were to accept an OTA, it could brick your phone. This is due to the fact that we don't flash the boodloader from other variants, for safety reasons. An OTA update would likely apply (or attempt to apply) the bootloader from the converted firmware. The outcome of this is unknown. It's possible that it works without issue, but if it doesn't, it has the potential to hard brick the device. For this reason, I haven't tested it, as other firmwares can be loaded by a mismatched bootloader without issue. Due to that, I recommend disabling all OTA checks / settings for additional safety. As a note, updates via Kies, Smart Switch, Odin, or any other utility are also a no-go. Updates must be applied manually if you want them.
If neither of those two things is a problem for you, then you might be happy with converting your firmware to another variant. It does work quite well when done correctly.
If you're interested in doing this, I could guide you through the process. It would be more convenient via instant messaging, so we could directly communicate in real time for the parts that will be specific to your device.
If you would like to, send me a PM to coordinate IM details. I use Telegram and Wire, and if neither is suitable for you, and you're okay exchanging phone numbers, I also use Signal if you'd prefer. I also use some other services as well, though I less prefer them. If none if the above are suitable, perhaps we can find one we have in common.

shellcode said:
Now, there's an interesting suggestion! Are you saying I can get the SM-G900A firmware from sammobile (or some other source) and just ODIN flash that to my SM-G900T?...
Click to expand...
Click to collapse
I could be wrong here but, based upon what I had read (my take on it), I don't believe that @Arbiter was recommending that you install the stock firmware rather an option that Arbiter had suggested to see if the WiFi Calling option is made available (based upon that members experience).
Am I correct @Arbiter?
~~~~~~~~~~~~~~~
I DO NOT provide support via PM unless asked/requested by myself. PLEASE keep it in the threads where everyone can share.

Ibuprophen said:
I could be wrong here but, based upon what I had read (my take on it), I don't believe that @Arbiter was recommending that you install the stock firmware rather an option that Arbiter had suggested to see if the WiFi Calling option is made available (based upon that members experience).
Am I correct @Arbiter?
~~~~~~~~~~~~~~~
I DO NOT provide support via PM unless asked/requested by myself. PLEASE keep it in the threads where everyone can share.
Click to expand...
Click to collapse
To clarify, I'm suggesting that if you want all carrier specific features (including Wi-Fi Calling), it can be done by cross-flashing the target carrier's firmware.
If the target firmware is correctly installed, and the corresponding CSC is properly installed in both the support files and configured in EFS (a simple three letter change to a file on the EFS partition), then all features for that carrier will be available.
This is the only way I know to achieve full functionality with another carrier's features. There doesn't appear to be any available research or success in simply transplanting the necessary programs and libraries to handle carrier features on a non-carrier ROM for the S5.

Arbiter said:
To clarify, I'm suggesting that if you want all carrier specific features (including Wi-Fi Calling), it can be done by cross-flashing the target carrier's firmware...
Click to expand...
Click to collapse
I apologize for my misunderstanding but, I will have to "Respectfully Disagree" with you.
Though Custom Firmwares may be lacking some/many of the carrier specific apps and those features these apps utilize but, there's ways to obtain them either directly or indirectly via installing, flashing and/or porting them to a device.
Just to clarify... I'm not stating that this applies to all carrier specific apps and/or features but, I've seen this done for many of them on a Verizon S5 device with a custom firmware installed.
Maybe we just have to end this respectfully with "Agreeing to Disagree"... :thumbup:
~~~~~~~~~~~~~~~
I DO NOT provide support via PM unless asked/requested by myself. PLEASE keep it in the threads where everyone can share.

Ibuprophen said:
I apologize for my misunderstanding but, I will have to "Respectfully Disagree" with you.
Though Custom Firmwares may be lacking some/many of the carrier specific apps and those features these apps utilize but, there's ways to obtain them either directly or indirectly via installing, flashing and/or porting them to a device.
Just to clarify... I'm not stating that this applies to all carrier specific apps and/or features but, I've seen this done for many of them on a Verizon S5 device with a custom firmware installed.
Maybe we just have to end this respectfully with "Agreeing to Disagree"... :thumbup:
~~~~~~~~~~~~~~~
Click to expand...
Click to collapse
Since you've seen this done, would you point us towards the correct direction in order to get at&t wifi calling on a G900T-based stock (or non-stock) OS? I have been trying different techniques and have only succeeded in causing bootloops :\
I don't want to use a bootloader locked G900A OS.

Related

[Q] Which Galaxy S 4 should I get?

I'm unfamiliar with Samsung phones (never had one), and I'm looking at getting a used/mint Galaxy S 4 for my wife. Here are the requirements:
1. SIM unlocked. I need to be able to use it on AT&T and T-Mobile networks in the US, and also other international carriers as need be when traveling, without a problem.
2. I need to have root access. Some apps that need to be installed on this phone requires root. It's not necessary to have the capability to flash custom ROM, etc. so stock ROM (or any ROM, for that matter, as long as it's stable) is fine. I just need root.
3. It has to have at least 4.3, or if possible 4.4.2. OTA capability for further update (if there will be any) is a good bonus but not required.
I likely won't be modifying this phone (flashing ROM/mods/etc.) after I set it up the first time. I'll set it up, give it to her, and forget about it.
So, which version of GS4 should I look for in ebay/swappa (and if there are any firmware requirements for easy rooting)? I'm going to be using it almost solely on a GSM-based network (currently a T-Mobile MVNO, but may switch to an AT&T MVNO soon) so AT&T version seems like an obvious choice, but I've heard that this model is a pain to SIM unlock (is it true?), while Verizon version is factory unlocked completely out of the box, and will work without a problem on AT&T or T-Mobile (and obviously overseas as well).
Can anyone give me any suggestion?
Newcron said:
I'm unfamiliar with Samsung phones (never had one), and I'm looking at getting a used/mint Galaxy S 4 for my wife. Here are the requirements:
1. SIM unlocked. I need to be able to use it on AT&T and T-Mobile networks in the US, and also other international carriers as need be when traveling, without a problem.
2. I need to have root access. Some apps that need to be installed on this phone requires root. It's not necessary to have the capability to flash custom ROM, etc. so stock ROM (or any ROM, for that matter, as long as it's stable) is fine. I just need root.
3. It has to have at least 4.3, or if possible 4.4.2. OTA capability for further update (if there will be any) is a good bonus but not required.
I likely won't be modifying this phone (flashing ROM/mods/etc.) after I set it up the first time. I'll set it up, give it to her, and forget about it.
So, which version of GS4 should I look for in ebay/swappa (and if there are any firmware requirements for easy rooting)? I'm going to be using it almost solely on a GSM-based network (currently a T-Mobile MVNO, but may switch to an AT&T MVNO soon) so AT&T version seems like an obvious choice, but I've heard that this model is a pain to SIM unlock (is it true?), while Verizon version is factory unlocked completely out of the box, and will work without a problem on AT&T or T-Mobile (and obviously overseas as well).
Can anyone give me any suggestion?
Click to expand...
Click to collapse
Check About Phone
Androiders96 said:
Check About Phone
Click to expand...
Click to collapse
This is basically the point of this thread. I need suggestions on what to check for
Newcron said:
This is basically the point of this thread. I need suggestions on what to check for
Click to expand...
Click to collapse
I9505
Androiders96 said:
I9505
Click to expand...
Click to collapse
:laugh:
Yeah I deserve that. I basically set myself up to get this answer. This is what I get for not being clear enough from the get go. Doh.
Obviously the international unlocked version is the most ideal, because there's no potential for headaches as I explained above. I of course knew this.
And yes, there are several of them available at Swappa, but they are all (understandably) much more expensive (some more than 150%) compared to the local version.
So, I guess my real question is whether I should get AT&T, T-Mobile, or Verizon version for my purposes above.
I also just examined the title of this subforum and realized that I may not be asking this on the right place. So, sorry about that. I'll switch over to the correct forum and ask this again. Thanks for answering!

Please Help: Trying to add Sprint CDMA/LTE Bands to my VZW G900V

I have a G900V bootloader unlocked currently running CM 13 and I would like to add Sprint CDMA & LTE bands so I can use a The Peoples Operator SIM card in an area that has better Sprint coverage than VZW. I read over this Guide on adding GSM & LTE Bands to the G900V and calculated the binaries to add the bands:
CDMA 0,1,10
LTE 2,4,13,25,26,41
CDMA Binary 10000000010
LTE Binary 100000000000000110000000000010000000010100
All set to go but I can't seem to get figure out how to get into USB Settings to change from AP to CP and MTP + ADB to RNDIS + DM + Modem, the dialer codes just don't seem to work even after changing efs/carrier/hiddenmenu from OFF to ON. I took a look at EFS Pro but it doesn't seem to have an option to Change from AP to CP. Any help would be greatly appreciated.
If your trying to get into diag mode this will do it running cm13.
http://forum.xda-developers.com/showthread.php?t=1626638
jbgtenn said:
If your trying to get into diag mode this will do it running cm13.
http://forum.xda-developers.com/showthread.php?t=1626638
Click to expand...
Click to collapse
Thank yo for the link. Sadly I couldn't get the scripts to work on my G900V S5 CM13. But that link ended up leading me to this one CM13 QPST Editing files is a little above my paygrade so to speak, I've been following directions for years but still a total newb at most of this stuff but I am hoping I'm on the right track.
twolostminds said:
Thank yo for the link. Sadly I couldn't get the scripts to work on my G900V S5 CM13. But that link ended up leading me to this one CM13 QPST Editing files is a little above my paygrade so to speak, I've been following directions for years but still a total newb at most of this stuff but I am hoping I'm on the right track.
Click to expand...
Click to collapse
It should work. Are you running the diag.sh script? I have same phone and cm13 and it works for me.
jbgtenn said:
It should work. Are you running the diag.sh script? I have same phone and cm13 and it works for me.
Click to expand...
Click to collapse
I run DIAG.SH and it just hangs there. I think I am going to do a fresh install of CM13 later this week and give it another shot.
this is what i'm trying to figure out, because i can get a good local S5 VZW but SPR use different LTE bands.
i know typically the saying is never flash anything for a different carrier of your model, but some people seem to do it with a ymmv statement, wondering if this may be the easier route to get it to just work like a native phone.
i've read several threads from people talking about carrier rom swap, some casually saying sure it can work, but no updates from OPs or others that said they would try, definitively saying that it worked or failed.
so... has anyone literally gotten something like the Odin flashable firmware at sammobile or someplace for the Verizon VZW sm-g900v and flashed it with the Sprint SPR sm-g900p stock firmware, completely changing its baseband, modem, everything so it now identifies and works the same as a Sprint phone?
or should i just keep waiting for another similarly cheap S5 bundle in a Sprint flavor?
Did you try *#0808#
Sent from my SM-G955U using Tapatalk
twolostminds said:
I have a G900V bootloader unlocked currently running.......
Click to expand...
Click to collapse
I've never added any bands to my G900V myself but, I do know that it's plausible to do this.
From what I can tell, the only bands that are needed that the SM-G900P has vs the SM-G900V are specific to the 4G LTE.
Though I did confirm this using a few different locations, I believe that the following link is the best choice in viewing the comparisons between the two devices.
https://www.phonemore.com/compare/p...m-g900v-vs-samsung-galaxy-s5-sm-g900p/4561723
With that guidance...
The following link is one of the Guides available on the forum for adding Bands to a GS5. It was closed but, not because it wasn't working. It was closed because of the negative interactions from various members in there but, the guide and downloads are still good.
https://forum.xda-developers.com/showthread.php?t=2886059
Please Note the success stories on the second post...
The following is another guide as well. Though, it's located within the Galaxy Note 4 area, you could say that the Galaxy Note 4 is the "Note" counterpart to the Galaxy S5.
https://forum.xda-developers.com/showthread.php?t=3160864
Please Note that the OP does reflect some S5 information as well...
Those are just 2 thread examples to help accomplish what you're looking to do.
I do wish you the best of luck and hopefully the next post here will reflect your success!
~~~~~~~~~~~~~~~
I DO NOT provide support via PM unless asked/requested by myself. PLEASE keep it in the threads where everyone can share.
thanks for the double check.
it looks like those are some of the threads and sites i've looked through already as i wanted to be sure i had the proper lte bands that the Sprint model came with, and it seemed possible.
however, with the increasing coverage of cybersecurity, i am increasingly hesitant the more closed source and leaked tools are involved (especially when i see some thread guides that have a mod edit for malicious download link removal).
i suppose i should just pass on the Verizon listing, and wait to spot a similarly good deal from a local person selling their personally cared for Sprint S5 plus spare battery charger case and 2nd battery all under $100 (i'm sure you can understand why i wanted to "make it work", hehe).

Stock firmware

Hi everyone. I am attempting to download the stock firmware for my Edge but can't find it. My phone has SM-G935A printed on the back. It is AT&T. The search feature on SAMMOBILE does not have that model. Is it ok to use a different firmware? It won't be AT&T anymore if I do, right?
The back of my phone gets really hot at times, especially right while booting. I wanted to try to root and put one of the custom ROMS on there but I am not doing anything till I find the correct Stock Firmware.
scm37390 said:
Hi everyone. I am attempting to download the stock firmware for my Edge but can't find it. My phone has SM-G935A printed on the back. It is AT&T. The search feature on SAMMOBILE does not have that model. Is it ok to use a different firmware? It won't be AT&T anymore if I do, right?
The back of my phone gets really hot at times, especially right while booting. I wanted to try to root and put one of the custom ROMS on there but I am not doing anything till I find the correct Stock Firmware.
Click to expand...
Click to collapse
Check out this forum, https://forum.xda-developers.com/att-s7-edge/how-to/updated-935u-935a-live-links-pi3-t3501686. I'm running my AT&T S7 Edge on this firmware, WWWWAAAAAAYYYYYY better than stock AT&T. It has NO AT&T bloatware and it has the Mobile Data On/Off toggle listed in the quick toggles bar. Before you flash this on your phone check what build you're on in the "about phone" in settings. Here is the link with the latest stock AT&T Firmware, https://forum.xda-developers.com/att-s7-edge/how-to/firmware-pi2-s7-edge-sm-g935a-10-03-16-t3477246. Download to your pc in case you want to flash back to stock. Don't root, not really stable if you do and you can't install any other firmware / ROM unless you flash 935U Firmware. You can brick your phone or even trip Knox counter and that will void your warranty if you needed to return to AT&T or Samsung.
ytaida said:
Check out this forum, https://forum.xda-developers.com/att-s7-edge/how-to/updated-935u-935a-live-links-pi3-t3501686. I'm running my AT&T S7 Edge on this firmware, WWWWAAAAAAYYYYYY better than stock AT&T. It has NO AT&T bloatware and it has the Mobile Data On/Off toggle listed in the quick toggles bar. Before you flash this on your phone check what build you're on in the "about phone" in settings. Here is the link with the latest stock AT&T Firmware, https://forum.xda-developers.com/att-s7-edge/how-to/firmware-pi2-s7-edge-sm-g935a-10-03-16-t3477246. Download to your pc in case you want to flash back to stock. Don't root, not really stable if you do and you can't install any other firmware / ROM unless you flash 935U Firmware. You can brick your phone or even trip Knox counter and that will void your warranty if you needed to return to AT&T or Samsung.
Click to expand...
Click to collapse
Hi and thanks. I don't care about warranty. I am thankful you explained that "ROOT" makes it unstable. How is it possible to flash custom ROMS without ROOT? Why is it so hard to find the dang firmware? I went back on that dang Sammobil to look for the stock firmware for a friends Verizon S7 Edge and I can't find THAT but NOW THE AT&T is there!!!!
It sounds to me like you are coming from an older phone that had an unlocked bootloader? Back in the day when flashing a new rom like paranoid or slimrom was the fun and cool way to differentiate your device from your friends. That was also a time when android was about as locked down as ios is now, and ios was still locking users into their own keyboard, and Samsung was scrapping with apple at every turn for the top seat in the mobile phone market. My how things have changed.
Android is much more open in some ways, there are far fewer things that most people need that require root access, and the device manufacturers have also begun locking down the devices much more. At least in the Samsung line, I don't know when the last US variant flagship bootloader was freely unlocked? The s3? I know I had a Verizon s6 that I could not even achieve root on following a certain point in the release cycle. Now we have all of these fun new terms like systemless root, magisk and engineering bootloader. It really comes down with what is your desired outcome from rooting. You can actually get a long way towards what you could do back then with a Samsung theme and the right apps.
I believe what ytaida is referring to is the ability to flash other s7 roms onto your phone. So while we may not be able to flash custom roms, anything with the correct bootloader can still be flashed. Typically with a phone that is only going to be in the same model, but Samsung kind of threw a curveball and created an incestual path for the s7. With their U firmware, (the 930U and 935U firmware shipped on the devices sold directly from Samsung as was mentioned above) you could flash an official version of that onto the tmobile, Verizon, att and a few other carriers hardware, and essentially change the model of the phone. From there changing it back was equally as easy, except changing it back could be changing a Verizon model into an att model. The radios were all the same. In this process a root exploit was achieved and some very smart (I am humbled by their knowledge and determination on these sites every day) folks started hacking together roms. So you will see some neat stuff done where you are never truly running as root, but there were modifications done as root somewhere along the line. Long story only mildly shorter. Be careful how far down the rabbithole you take this.
The next thing you know it could be 6am and you realize you've been downloading and archiving your own copies of stock Samsung firmware for the last 20 hours, for devices you don't even have lol..
Sure there are still custom roms out there, but as a US customer, if that is what you're looking for you are best off with a nexus device or One Plus.
scm37390 said:
Hi and thanks. I don't care about warranty. I am thankful you explained that "ROOT" makes it unstable. How is it possible to flash custom ROMS without ROOT? Why is it so hard to find the dang firmware? I went back on that dang Sammobil to look for the stock firmware for a friends Verizon S7 Edge and I can't find THAT but NOW THE AT&T is there!!!!
Click to expand...
Click to collapse
Is not hard, just need to look in correct forum. BTW what firmware you want. You can find any firmware you want for both models. Just look harder.
On Edge of Galaxy
A few things:
1) There doesn't appear to be any physical difference between the 935A, 935T, and 935U. You can, as long as you mind the bootloader version, freely switch between the three versions. I'm not sure about the Verizon and Spring versions.
2) The 935A FW link is around here. I've used it, and it worked fine, but you will be on tap for a few OTA updates.
3) The 935T FW link is actually available in several places, but there is a direct link over in the T-Mobile S7E forum. I'm not really sure what it gets you that the 935U doesn't, though. It has less bloat than AT&T, about the same amount of branding, and AT&T still refuses to let you have access to the more advanced call features. It does appear to be a lot less laggy than the 935A, though - AT&T really screwed up the Nougat upgrade compared to everyone else. It will likely get updates faster as well, and T-mobile doesn't have provisioning checks for tethering.
4) The 935U FW link is also "stock" for this phone, and works much better in many respects (it's certainly faster and less laggy) The difference between the 935A/935T and 935U firmware is that the former two have all the software needed for AT&T/T-mobile specific features, like WiFi calling, VoLTE, Visual Voicemail, etc. The latter has none of those things, but it does give you back BT tethering, disables the checks for WiFi and USB tethering, along with a few other features that were disabled.
Thus, you need to decide what is more important. Carrier specific calling features or more tethering options and overall better performance and battery life.
Please check the ORIGINAL post date!!!
I got the help I needed MONTHS ago. For those of you actually attempting to help,
"THANKS".
NORBARB, as a "SENIOR MEMBER" I would have expected much more than that and again, please look at the date I posted that question. Of course the firmware has shown up now. I don't even own that phone anymore.
How do you determine bootloader version?
jshamlet said:
A few things:
1) There doesn't appear to be any physical difference between the 935A, 935T, and 935U. You can, as long as you mind the bootloader version, freely switch between the three versions. I'm not sure about the Verizon and Spring versions.
2) The 935A FW link is around here. I've used it, and it worked fine, but you will be on tap for a few OTA updates.
3) The 935T FW link is actually available in several places, but there is a direct link over in the T-Mobile S7E forum. I'm not really sure what it gets you that the 935U doesn't, though. It has less bloat than AT&T, about the same amount of branding, and AT&T still refuses to let you have access to the more advanced call features. It does appear to be a lot less laggy than the 935A, though - AT&T really screwed up the Nougat upgrade compared to everyone else. It will likely get updates faster as well, and T-mobile doesn't have provisioning checks for tethering.
4) The 935U FW link is also "stock" for this phone, and works much better in many respects (it's certainly faster and less laggy) The difference between the 935A/935T and 935U firmware is that the former two have all the software needed for AT&T/T-mobile specific features, like WiFi calling, VoLTE, Visual Voicemail, etc. The latter has none of those things, but it does give you back BT tethering, disables the checks for WiFi and USB tethering, along with a few other features that were disabled.
Thus, you need to decide what is more important. Carrier specific calling features or more tethering options and overall better performance and battery life.
Click to expand...
Click to collapse
I'm interested in switching my unlocked Tmobile G935T to ATT G935A to take advantage of Wi-fi Calling. I'm not sure how to make sure I select the AT&T firmware that has the same bootloader as mentioned above.

Verizon in UK

Hey guys,
So a family member (FM) of mine received a Verizon GS5 and I was just wondering if it would be possible to change to UK, as far as I am concerned when I owned a GS2 I would have to change the modem for it to work in a completely different country (e.g. owning a UK GS2 and taking it to somewhere in Asia or South America). However, would prefer to have a complete clean install (and possibly a debloated ROM) with a UK firmware? If this is possible what are the steps to folow, do I have to be careful with tripping KNOX and/or flash counter? FM doesn't mind losing data.
"This Sim Card is from an Unknown Source". Just from reading this thread I can see that I either have to root the phone and disable/uninstall the app or install a different ROM, would prefer to have it as official as possible. Tried changing the APN settings and inserting the information manually, unsuccessful. Haven't tried searching for a carrier and letting it set up itself. I don't mean to be difficult, sorry!
Checked here for frequency compatibility, does this mean that 4G wouldn't work?
Thank you!
suenoromis said:
Hey guys, So a family member (FM) of mine received a Verizon GS5 and I was just wondering if it would be possible to change to UK, as far as I am concerned when I owned a GS2 I would have to change the modem for it to work in a completely different country (e.g. owning a UK GS2 and taking it to somewhere in Asia or South America). However, would prefer to have a complete clean install (and possibly a debloated ROM) with a UK firmware? If this is possible what are the steps to folow, do I have to be careful with tripping KNOX and/or flash counter?...
Click to expand...
Click to collapse
I have never done this myself but, the following threads reflect the change from a G900V to a G900F. Don't be afraid to ask for some member guidance within one of them too.
https://forum.xda-developers.com/showthread.php?t=3550445
https://forum.xda-developers.com/showthread.php?t=2839557
If all else fails, and you don't receive any responses from the above threads, then your next best bet is to post this question within the following Q&A thread that's specific to your device and variants.
https://forum.xda-developers.com/showthread.php?t=2700073
Good Luck!
~~~~~~~~~~~~~~~
I DO NOT provide support via PM unless asked/requested by myself. PLEASE keep it in the threads where everyone can share.
suenoromis said:
Checked here for frequency compatibility, does this mean that 4G wouldn't work?
Click to expand...
Click to collapse
You need CSC=BTU and a clean stock-like ROM, right?
Have a look: https://forum.xda-developers.com/galaxy-s5/development/rom-ane4-kitkat-4-4-2-multi-csc-t2813628
Installation on G900V is tricky because of locked bootloader but it works fine.
4g may work on B3 (it's supported by device, just not listed in specs) but the chances are not very high.

Flashing unlocked Samsung S10+ to T-Mobile Firmware

Hey guys, first time on this forum and I am trying to figure things out. I never flashed a firmware so im a noob to this, but I can definitely follow along. Here is my main concern:
Seems like you need a T-Mobile device to get access to features like advanced messaging, visual voicemail, wifi calling, etc. Things I use all the time, but I never knew it would be taken away if I purchased an unlocked S10 plus.
My main goal is to get these features back, which from what I understand requires flashing the firmware? If there is any other way I am more than open to listen to it!
I have Odin and downloaded the "userdata" linked into this post: https://forum.xda-developers.com/galaxy-s10/how-to/g975u-g975u1-firmware-links-t3905897 specifically USERDATA_TMB_G975USQU1ASAT_CL15296297_QB21819666_REV00_user_low_ship_MULTI_CERT.zip
I figure I unzip to get the tar file, select Odin use data and only flash this file? Kinda clueless about all this.
In addition, if I were to flash I hope that Samsung Pay, Knox, finance apps will still work; also the warranty is still good. I know that rooting the device will/may make these unusable, but I just want to confirm.
Any guidance is greatly appreciated, thanks!
mdiddyshow said:
Hey guys, first time on this forum and I am trying to figure things out. I never flashed a firmware so im a noob to this, but I can definitely follow along. Here is my main concern:
Seems like you need a T-Mobile device to get access to features like advanced messaging, visual voicemail, wifi calling, etc. Things I use all the time, but I never knew it would be taken away if I purchased an unlocked S10 plus.
My main goal is to get these features back, which from what I understand requires flashing the firmware? If there is any other way I am more than open to listen to it!
I have Odin and downloaded the "userdata" linked into this post: https://forum.xda-developers.com/galaxy-s10/how-to/g975u-g975u1-firmware-links-t3905897 specifically USERDATA_TMB_G975USQU1ASAT_CL15296297_QB21819666_REV00_user_low_ship_MULTI_CERT.zip
I figure I unzip to get the tar file, select Odin use data and only flash this file? Kinda clueless about all this.
In addition, if I were to flash I hope that Samsung Pay, Knox, finance apps will still work; also the warranty is still good. I know that rooting the device will/may make these unusable, but I just want to confirm.
Any guidance is greatly appreciated, thanks!
Click to expand...
Click to collapse
WiFi Calling, VoLTE are working just fine, but I get what you mean... I mostly flashed 4 firmware files: BL, AP, CL and CSC and couple of times did flash USERDATA too. As userdata file was not required to be flashed unless you want all bloatware from the carrier. Don't know if S10 needs this "userdata" file. You would want to flash I mentioned and specifically flash CSC file and not the HOME CSC(as it usually retains user data on your phone) and in your case you want odin to wipe the device. I want to flash too, but waiting for firmware to become available on sammobile website
Charkatak said:
WiFi Calling, VoLTE are working just fine, but I get what you mean... I mostly flashed 4 firmware files: BL, AP, CL and CSC and couple of times did flash USERDATA too. As userdata file was not required to be flashed unless you want all bloatware from the carrier. Don't know if S10 needs this "userdata" file. You would want to flash I mentioned and specifically flash CSC file and not the HOME CSC(as it usually retains user data on your phone) and in your case you want odin to wipe the device. I want to flash too, but waiting for firmware to become available on sammobile website
Click to expand...
Click to collapse
Basically I should wait for Sammobile to upload those 4 firmware files (BL,AP,CL,CSC) and then use Odin to flash the firmware. Seems the instructions for that are really easy.
As far as the Samsung pay / finance apps, would it mess those up like rooting the device?
mdiddyshow said:
Basically I should wait for Sammobile to upload those 4 firmware files (BL,AP,CL,CSC) and then use Odin to flash the firmware. Seems the instructions for that are really easy.
As far as the Samsung pay / finance apps, would it mess those up like rooting the device?
Click to expand...
Click to collapse
There should be no issue with Samsung Pay and other apps, as you would be flashing official Samsung firmware. Wait for firmware files to be available and then you would be able to see which files will be included and go from there. On my unlocked S8, I didn't flash userdata file and still had all T-Mobile features you were mentioning. If with S10 we will have the same, then skipping userdata is better as the device is pretty much clean without unneeded apps
I installed T-Mobile's Visual Voicemail app from Play Store, and it works just fine. (Unlocked S10)
I did the same. Figured if I was paying outright might as well get an unlocked device. But the Samsung's from tmobile have the multi line function and I'm trying to get rid of my iPhone. But I use that number alot as well. So that multi line function built in for DIGITS worked for me. If you flash it let me know if it has it built in
Sent from my SM-G973U1 using Tapatalk
bradbutter said:
I did the same. Figured if I was paying outright might as well get an unlocked device. But the Samsung's from tmobile have the multi line function and I'm trying to get rid of my iPhone. But I use that number alot as well. So that multi line function built in for DIGITS worked for me. If you flash it let me know if it has it built in
Sent from my SM-G973U1 using Tapatalk
Click to expand...
Click to collapse
Wait. How did you get the multi line functioning on the s10? I have been scouring the internet for a solution
Curious, are there any features/capabilities that the unlocked version has, but the TMobile version does not? I ordered an unlocked S10+ (haven't received it yet) and TMobile is my carrier.
From what I've read so far, built-in caller ID, and the ability to turn mobile data off, are not on the TMobile variant, but I can't confirm that.
mosi76 said:
Wait. How did you get the multi line functioning on the s10? I have been scouring the internet for a solution
Click to expand...
Click to collapse
I don't. I have the unlocked version. But I have tmobile. Didn't think about it until I received my device. So If flashing the tmobile software will give it to me i will flash it.
Sent from my SM-G973U1 using Tapatalk
Thanks for the info too! I am also quite curious about this as I have an unlocked S10+ still pre-ordered. Unfortunately, it's too late for me to cancel it and re-ordering it on T-Mobile before April comes around as I would like to use the phone on my travels by then (still hanging on to my S5 at the moment... lol).
From what I've read, the two major features lost on unlocked phones are EVS and RCS messaging. While RCS messaging is something I can live without, I would really like to keep the EVS (Enhanced Voice Service) feature usable on the phone when it arrives.
One other question, are you able to get the updates via T-Mobile on the flashed firmware or does it have to be flashed again for future updates?
KunoMochi said:
Thanks for the info too! I am also quite curious about this as I have an unlocked S10+ still pre-ordered. Unfortunately, it's too late for me to cancel it and re-ordering it on T-Mobile before April comes around as I would like to use the phone on my travels by then (still hanging on to my S5 at the moment... lol).
From what I've read, the two major features lost on unlocked phones are EVS and RCS messaging. While RCS messaging is something I can live without, I would really like to keep the EVS (Enhanced Voice Service) feature usable on the phone when it arrives.
One other question, are you able to get the updates via T-Mobile on the flashed firmware or does it have to be flashed again for future updates?
Click to expand...
Click to collapse
What is EVS? Is that just another term for VoLTE?
Sent from my ZTE A2017U using Tapatalk
Kjn246 said:
What is EVS? Is that just another term for VoLTE?
Sent from my ZTE A2017U using Tapatalk
Click to expand...
Click to collapse
VoLTE and EVS are different. EVS is an evolution of the AMR-WB speech codec (aka HD Voice) whereas VoLTE uses said speech codecs to work. VoLTE is currently recommended to use at least AMR-WB for good voice quality. As EVS is the newer speech codec that uses similar concepts to that of AMR-WB, it is backwards compatible with technologies already using AMR-WB, which includes VoLTE.
That is what I can gather, feel free to correct me if I am wrong in any of the details.
Thanks to all for their insight. Just an update:
I flashed the T-Mo firmware on my unlocked S10+. It worked - RCS and video calling are back! However I noticed 3 things: 1st I used the CSC, but it did not delete all my apps. 2nd when the device rebooted after flashing it went into recovery mode (is this normal?), but i re-rebooted it and it went right into my phone.
3rd while RCS is working on the phone and between my Android 8.0 Note8 Tmo phone, the Note8 cannot send pictures/files to my S10+. The S10+ can send anything to me, but not the other way around. Read, Delivered, typing indicators work. I am not too concerned about this as I am getting an S10+ myself next week so this will not be an issue.
Any thoughts about that?
Other than the RCS thing, the S10+ device is working completely normally. I heard you have to change the CSC on the device but I did not do that (echo, adb, and all that jazz) - is that necessary as well?
Lots of random thoughts over here!
mdiddyshow said:
Thanks to all for their insight. Just an update:
I flashed the T-Mo firmware on my unlocked S10+. It worked - RCS and video calling are back! However I noticed 3 things: 1st I used the CSC, but it did not delete all my apps. 2nd when the device rebooted after flashing it went into recovery mode (is this normal?), but i re-rebooted it and it went right into my phone.
3rd while RCS is working on the phone and between my Android 8.0 Note8 Tmo phone, the Note8 cannot send pictures/files to my S10+. The S10+ can send anything to me, but not the other way around. Read, Delivered, typing indicators work. I am not too concerned about this as I am getting an S10+ myself next week so this will not be an issue.
Any thoughts about that?
Other than the RCS thing, the S10+ device is working completely normally. I heard you have to change the CSC on the device but I did not do that (echo, adb, and all that jazz) - is that necessary as well?
Lots of random thoughts over here!
Click to expand...
Click to collapse
Would you be able to help walk me through the process to do this. I used to root and flash custom roms to phones but the carrier specific and Samsung stuff is new to me. I'm interested in getting on the TMO firmware possibly for RCS but I don't know if it's worth the hassle for it yet
mdiddyshow said:
Thanks to all for their insight. Just an update:
I flashed the T-Mo firmware on my unlocked S10+. It worked - RCS and video calling are back! However I noticed 3 things: 1st I used the CSC, but it did not delete all my apps. 2nd when the device rebooted after flashing it went into recovery mode (is this normal?), but i re-rebooted it and it went right into my phone.
3rd while RCS is working on the phone and between my Android 8.0 Note8 Tmo phone, the Note8 cannot send pictures/files to my S10+. The S10+ can send anything to me, but not the other way around. Read, Delivered, typing indicators work. I am not too concerned about this as I am getting an S10+ myself next week so this will not be an issue.
Any thoughts about that?
Other than the RCS thing, the S10+ device is working completely normally. I heard you have to change the CSC on the device but I did not do that (echo, adb, and all that jazz) - is that necessary as well?
Lots of random thoughts over here!
Click to expand...
Click to collapse
Thanks for that update.
By any chance, could you let us know if the built in VVM is working? (accessed from the dialer by tapping the 3-dot menu button ((from within Dialer)). You should see Visual Voicemail as an option, not just Voicemail.
I flashed the TMo firmware as well, but used Home_CSC. That didn't seem to matter, since Userdata wipes the phone anyways, but I'm curious as to whether that is why I am not seeing Visual Voicemail.
As for the booting into recovery, did you have the reboot option checked in Odin when you started the flash? Mine has booted to recovery before, but it has always been because I forgot to check that box.
jordanyork said:
Thanks for that update.
By any chance, could you let us know if the built in VVM is working? (accessed from the dialer by tapping the 3-dot menu button ((from within Dialer)). You should see Visual Voicemail as an option, not just Voicemail.
I flashed the TMo firmware as well, but used Home_CSC. That didn't seem to matter, since Userdata wipes the phone anyways, but I'm curious as to whether that is why I am not seeing Visual Voicemail.
As for the booting into recovery, did you have the reboot option checked in Odin when you started the flash? Mine has booted to recovery before, but it has always been because I forgot to check that box.
Click to expand...
Click to collapse
So I have another update about this. When I included the userdata in Odin it reset my device. The visual voicemail is not working still, and i can't confirm (or i dont know how to confirm) if wifi calling or VoLTE is working as there isn't any real indication on the device. But all my RCS problems have been fixed!
...Except that all my MMS contains the "Subject: No Subject" header on every single MMS. Every. Single. One. I had to change my default messages app because this was just too damn annoying.
and yeah, i did check the box.
mdiddyshow said:
So I have another update about this. When I included the userdata in Odin it reset my device. The visual voicemail is not working still, and i can't confirm (or i dont know how to confirm) if wifi calling or VoLTE is working as there isn't any real indication on the device. But all my RCS problems have been fixed!
...Except that all my MMS contains the "Subject: No Subject" header on every single MMS. Every. Single. One. I had to change my default messages app because this was just too damn annoying.
and yeah, i did check the box.
Click to expand...
Click to collapse
Is there a voicemail icon in the dialer after flashing? Or it's still not there?
---------- Post added at 03:48 PM ---------- Previous post was at 03:47 PM ----------
WiFi calling option is within the phone app settings itself, and it would word even without flashing tmo
Anyone know if flashing tmobiles firmware onto the unlocked s10 will void warranty? if so id rather just get the locked tmobile version.
Low_Key_Slaps said:
Anyone know if flashing tmobiles firmware onto the unlocked s10 will void warranty? if so id rather just get the locked tmobile version.
Click to expand...
Click to collapse
No. This does not trip knox, nor will it void your warranty. Tampering such as flashing unofficial software will incr the Knox counter. This matters because technicians inspect the software state (among other things during checkups).
Assuming they actually verify it, the device will fail this step (not the case when using signed packages from Samsung for conversion!). .
Ace42 said:
No. This does not trip knox, nor will it void your warranty. Tampering such as flashing unofficial software will incr the Knox counter. This matters because technicians inspect the software state (among other things during checkups).
Assuming they actually verify it, the device will fail this step (not the case when using signed packages from Samsung for conversion!). .
Click to expand...
Click to collapse
I spoke with a Samsung care rep on their website, who told me it will void the warranty. But then again, most customer care reps dont actually know what their talking about beyond the basic questions...

Categories

Resources