Develop Bugs

Unlocked T999 Rom/Carrier Question

I have an unlocked T-Mobile S3 and I am ready activate it on Straight Talk which I believe uses ATTs network. My question is concerning custom roms; can anyone confirm that using roms specifically for the T-Mobile version will or will not cause issues if i use a different carrier?
Thanks

Infamous_Cheez said:
I have an unlocked T-Mobile S3 and I am ready activate it on Straight Talk which I believe uses ATTs network. My question is concerning custom roms; can anyone confirm that using roms specifically for the T-Mobile version will or will not cause issues if i use a different carrier?
Thanks
Click to expand...
Click to collapse
No it will not.

Don_Perrignon said:
No it will not.
Click to expand...
Click to collapse
I was a bit confused because there are several threads/devs trying to make sure users know to flash the right rom for their phone version. I also know that the ATT & T-Mobile versions are identical, besides the ATT version supporting ATT's LTE frequency and TM's supporting their HSPA+ frequency, and since I bought this phone off contract w/o warranty I want to make sure don't end up with a $600 paperweight.
Thanks for your confirmation!

Wait... Just some that we're on the same page, I read that as if you took a T-Mo phone, with a custom ROM, unlocked it, and used the phone on another GSM carrier, would there be problems - the answer is no.
If you take a T-Mo phone and use another carrier's ROM that's not compatible with T-Mo's phone - yes you will have problems.

[Q] I have a T-Mobile S4 that refuses to select LTE for other carriers

Hey Y'all,
I've seen the other threads and I know that LTE works for AT&T but for the life of me, I cannot get it to select LTE
at all. I've tried the connections-->network mode menu and whenever I select LTE+WCDMA+GSM it always reverts
back to WCDMA+GSM the moment i back out of the menu. Also when using the *#2263# and I try and select it
via that way, I get bars but no data. Can anyone help me shed some light on this?
Is there another way to prioritize LTE? Do i need to flash a new kernel or modem?
Thanks guys!

Is lt available in your area?

mgbotoe said:
Is lt available in your area?
Click to expand...
Click to collapse
Yea that's whats bugging me. I put the AT&T sim back into my GN II and it gets LTE easy. I'm still within the return period
I just dont know if I'm missing a step or if the phone is defective. But it gets T-Mobile LTE ( in what few places get it
where I'm at ). So I don't know

Did you flash the att radio?
Sent from my SGH-M919 using Tapatalk 2

elesbb said:
Did you flash the att radio?
Sent from my SGH-M919 using Tapatalk 2
Click to expand...
Click to collapse
No I did not. I just did the unlock method that was posted here. So forgive the noob question, but I would have to flash
the AT&T radio to get LTE? Or is this just a troubleshooting method you want me to try? I just thought I wouldn't have
to flash the AT&T radio since it supported the bands Out-the-box.

Infornography said:
No I did not. I just did the unlock method that was posted here. So forgive the noob question, but I would have to flash
the AT&T radio to get LTE? Or is this just a troubleshooting method you want me to try? I just thought I wouldn't have
to flash the AT&T radio since it supported the bands Out-the-box.
Click to expand...
Click to collapse
Technically, you shouldn't have to. It supports 700 MHz LTE out of the box. The T-Mobile S4 is the "best" version because it supports both AT&T and T-Mobile bands out of the box. The AT&T S4 supports AT&T and T-Mobile LTE out of the box, but not T-Mobile HSPA+ (AWS) without a mod.

Product F(RED) said:
Technically, you shouldn't have to. It supports 700 MHz LTE out of the box. The T-Mobile S4 is the "best" version because it supports both AT&T and T-Mobile bands out of the box. The AT&T S4 supports AT&T and T-Mobile LTE out of the box, but not T-Mobile HSPA+ (AWS) without a mod.
Click to expand...
Click to collapse
Yes but without the proper radio. How's it supposed to know what to connect to
Sent from my SGH-M919 using Tapatalk 2

Product F(RED) said:
Technically, you shouldn't have to. It supports 700 MHz LTE out of the box. The T-Mobile S4 is the "best" version because it supports both AT&T and T-Mobile bands out of the box. The AT&T S4 supports AT&T and T-Mobile LTE out of the box, but not T-Mobile HSPA+ (AWS) without a mod.
Click to expand...
Click to collapse
****. That's what I thought. Oh well. I'll do an exchange then at T-mobile. Hopefully it's just this phone. Thanks guys.

Infornography said:
No I did not. I just did the unlock method that was posted here. So forgive the noob question, but I would have to flash
the AT&T radio to get LTE? Or is this just a troubleshooting method you want me to try? I just thought I wouldn't have
to flash the AT&T radio since it supported the bands Out-the-box.
Click to expand...
Click to collapse
It's more along the lines of a troubleshooting method. I believe I read another thread exactly like yours and the solution was to flash att radio. Think of it like a regular am/fm radio. All the hardware is there, but without something to control what stations it can play, how's it gonna know what to play?
Sent from my SGH-M919 using Tapatalk 2

elesbb said:
Yes but without the proper radio. How's it supposed to know what to connect to
Sent from my SGH-M919 using Tapatalk 2
Click to expand...
Click to collapse
The network is decided by the SIM card (the entire purpose of GSM). With an AT&T SIM, he should still be able to pick up T-Mobile LTE (AWS LTE is what T-Mobile uses and it's supported in all AT&T devices). My AT&T Note 2 gets T-Mobile LTE, just like my T-Mobile Note 2 does.
Also you can't cross-flash modems because the partition sizes are different; ROMs may be compatible (that's the case with the Note 2) but not the modem. If you flash another device's modem, you'll lose your IMEI (until you flash back the correct one) and your device will bootloop with no signal. From experience.
IGNORE THE GUY TELLING YOU TO FLASH THE AT&T RADIO. YOU'LL BRICK YOUR PHONE.
----------------------------
I just remembered the reason. AT&T won't activate LTE on a non-AT&T phone (on their end on the computer) unless you lie to them and give them the IMEI of an AT&T device. 10000% sure. Fixed this for another guy with a T-Mobile Note 2 trying to use it on AT&T. I have one for you. You go on chat online and tell them you're not getting LTE. They ask you for an IMEI number of an AT&T LTE device (it doesn't have to be your S4's) and then they can activate LTE on their end. I happen to have an IMEI of an in-store HTC One on hand. I'll PM you.
Here's the thread where I helped the guy (last page): http://forum.xda-developers.com/showthread.php?t=1953015

Product F(RED) said:
The network is decided by the SIM card (the entire purpose of GSM). With an AT&T SIM, he should still be able to pick up T-Mobile LTE (AWS LTE is what T-Mobile uses and it's supported in all AT&T devices). My AT&T Note 2 gets T-Mobile LTE, just like my T-Mobile Note 2 does.
Also you can't cross-flash modems because the partition sizes are different; ROMs may be compatible (that's the case with the Note 2) but not the modem. If you flash another device's modem, you'll lose your IMEI (until you flash back the correct one) and your device will bootloop with no signal. From experience.
IGNORE THE GUY TELLING YOU TO FLASH THE AT&T RADIO. YOU'LL BRICK YOUR PHONE.
----------------------------
I just remembered the reason. AT&T won't activate LTE on a non-AT&T phone (on their end on the computer) unless you lie to them and give them the IMEI of an AT&T device. 10000% sure. Fixed this for another guy with a T-Mobile Note 2 trying to use it on AT&T. I have one for you. You go on chat online and tell them you're not getting LTE. They ask you for an IMEI number of an AT&T LTE device (it doesn't have to be your S4's) and then they can activate LTE on their end. I happen to have an IMEI of an in-store HTC One on hand. I'll PM you.
Here's the thread where I helped the guy (last page): http://forum.xda-developers.com/showthread.php?t=1953015
Click to expand...
Click to collapse
Thanks for all the help guys. I already have the GN-II's imei listed on my account however and with the LTE feature code on my account thanks to my buddy who is a rep at the att store. I'm gonna meet him in a few minutes to get another sim card just to give this another shot before i do an exchange at t-mobile seeing as t-mobile is more anal about doing exchanges unless they can physically verify in store what you're *****ing about.

Product F(RED) said:
The network is decided by the SIM card (the entire purpose of GSM). With an AT&T SIM, he should still be able to pick up T-Mobile LTE (AWS LTE is what T-Mobile uses and it's supported in all AT&T devices). My AT&T Note 2 gets T-Mobile LTE, just like my T-Mobile Note 2 does.
Also you can't cross-flash modems because the partition sizes are different; ROMs may be compatible (that's the case with the Note 2) but not the modem. If you flash another device's modem, you'll lose your IMEI (until you flash back the correct one) and your device will bootloop with no signal. From experience.
IGNORE THE GUY TELLING YOU TO FLASH THE AT&T RADIO. YOU'LL BRICK YOUR PHONE.
----------------------------
I just remembered the reason. AT&T won't activate LTE on a non-AT&T phone (on their end on the computer) unless you lie to them and give them the IMEI of an AT&T device. 10000% sure. Fixed this for another guy with a T-Mobile Note 2 trying to use it on AT&T. I have one for you. You go on chat online and tell them you're not getting LTE. They ask you for an IMEI number of an AT&T LTE device (it doesn't have to be your S4's) and then they can activate LTE on their end. I happen to have an IMEI of an in-store HTC One on hand. I'll PM you.
Here's the thread where I helped the guy (last page): http://forum.xda-developers.com/showthread.php?t=1953015
Click to expand...
Click to collapse
You dont need to be so rude first of all. Secondly I never told him to do anything, i simply asked if he flashed the radio and told him it was a troubleshooting method. Meaning, research it before you do it. Just like anything else.
Secondly, others have gotten LTE on their T-Mobile devices without talking to ATT. I already stated i was using the top of my head for diagnosing and never did i tell him to do anything. And since i was going off the top of my head, i remember being able to flash ATT radios to the S3 and S2 of T-Mobile. Also, he has a T-MOBILE DEVICE wanting ATT LTE on it, not the other way around as you are thinking.. Any how, we are two very smart people, we need not argue with one another and telling the op to ignore someone. Thats just flat out rude. Especially since i never said "go flash the ATT radio" i simply asked a question.
To the OP,
Have you set up your APN configurations for ATT?

elesbb said:
You dont need to be so rude first of all. Secondly I never told him to do anything, i simply asked if he flashed the radio and told him it was a troubleshooting method. Meaning, research it before you do it. Just like anything else.
Secondly, others have gotten LTE on their T-Mobile devices without talking to ATT. I already stated i was using the top of my head for diagnosing and never did i tell him to do anything. And since i was going off the top of my head, i remember being able to flash ATT radios to the S3 and S2 of T-Mobile. Also, he has a T-MOBILE DEVICE wanting ATT LTE on it, not the other way around as you are thinking.. Any how, we are two very smart people, we need not argue with one another and telling the op to ignore someone. Thats just flat out rude. Especially since i never said "go flash the ATT radio" i simply asked a question.
To the OP,
Have you set up your APN configurations for ATT?
Click to expand...
Click to collapse
I'm sorry if I came off as rude to you; I was merely trying to tell him to not cross-flash S4 modems as it can brick the device; you have to be careful what you tell people to do if they're coming to you for help. It's not like with the S2. I correctly said he has a T-Mobile device and wants AT&T LTE on it, and as I said before, I've fixed the issue with someone who was in the same situation with a T-Mobile Galaxy Note 2. Like I stated, the phone itself is capable of 700 MHz LTE, which is what AT&T uses. You don't have to flash any modems. It should just work. The fix is above in the last paragraph.
Supported frequencies: http://www.samsung.com/us/mobile/cell-phones/SGH-M919ZWATMB-specs

Sorry guys but I just switched sims and confirmed I have an lte imei and feature on my acct but no dice.

Infornography said:
Sorry guys but I just switched sims and confirmed I have an lte imei and feature on my acct but no dice.
Click to expand...
Click to collapse
Did you try changing APN configurations?

Update: I switched the phone, did the unlock process again and....it still refuses to select LTE. I dunno. At this point I'm at a loss and thinking that it might have something to do with the unlock process itself. I might just do one more exchange and pay for the unlock. Can someone who has AT&T LTE on their S 4 do me a favor and post their APN settings so I can compare just to be absolutely sure it's correct?

I have a T-Mobile s4 that I put my AT&T SIM card in out of my AT&T galaxy note 2 and lte works fine. My issue is, I have random losses of network signal then it just comes back moments later while using the T-Mobile s4 with my AT&T SIM card. I used the unlock method posted in the T-Mobile s4 thread, rooted and flashed the Jedi Rom from the T-Mobile s4 thread. Can anyone shed some light on this issue?
Sent From An Incognegro Galaxy Note 2

[Q] Verizon HTC One AT&T Sim

Hi,
I purchased Verizon HTC One from craigslist it was mentioned that it is pre-unlocked phone. I have used T-Mobile sim and it is working however when I tried AT&T sim in it that didn't work. It shows at top that network is AT&T but I am unable to make or receive calls. I was able to use data on AT&T's edge network ( though my sim is LTE). I know that both T-Mobile and AT&T are GSM networks and this phone is CDMA/GSM. Does anybody else using AT&T sim on Verizon HTC One? Do I have to change some kind of settings??
Regards,

HTC ONE Verison Unlocked
asim99 said:
Hi,
I purchased Verizon HTC One from craigslist it was mentioned that it is pre-unlocked phone. I have used T-Mobile sim and it is working however when I tried AT&T sim in it that didn't work. It shows at top that network is AT&T but I am unable to make or receive calls. I was able to use data on AT&T's edge network ( though my sim is LTE). I know that both T-Mobile and AT&T are GSM networks and this phone is CDMA/GSM. Does anybody else using AT&T sim on Verizon HTC One? Do I have to change some kind of settings??
Regards,
Click to expand...
Click to collapse
Hello,
I have the same Verizon phone and I'm using T-mobile network, but I can't get data started. What APN settings did you use? If
you could please help I would greatly appreciate it.
Thanx,
SiouxV

You will only get edge because Verizon blocked some of the bands that you would need for hspa speeds.
Sent from my HTC6435LVW using Tapatalk

asim99 said:
Hi,
I purchased Verizon HTC One from craigslist it was mentioned that it is pre-unlocked phone. I have used T-Mobile sim and it is working however when I tried AT&T sim in it that didn't work. It shows at top that network is AT&T but I am unable to make or receive calls. I was able to use data on AT&T's edge network ( though my sim is LTE). I know that both T-Mobile and AT&T are GSM networks and this phone is CDMA/GSM. Does anybody else using AT&T sim on Verizon HTC One? Do I have to change some kind of settings??
Regards,
Click to expand...
Click to collapse
You will have to change settings to gsm/umts as att uses. Settings>mobile data> preferred network. Also Google att 3g apn settings and edit son. You won't get lte but I don't see why you shouldn't get 3g.

spokanite said:
You will have to change settings to gsm/umts as att uses. Settings>mobile data> preferred network. Also Google att 3g apn settings and edit son. You won't get lte but I don't see why you shouldn't get 3g.
Click to expand...
Click to collapse
Weird because I have a straight talk att and tmobile SIM card with correct apn's set and I only get edge. I know tmobile reformed my area to the 1900 band too. If I pop those SIM cards in my droid DNA I can pick up HSPA speeds with the same apn settings.
Sent from my HTC6435LVW using Tapatalk

selayan said:
Weird because I have a straight talk att and tmobile SIM card with correct apn's set and I only get edge. I know tmobile reformed my area to the 1900 band too. If I pop those SIM cards in my droid DNA I can pick up HSPA speeds with the same apn settings.
Sent from my HTC6435LVW using Tapatalk
Click to expand...
Click to collapse
That is weird. I would assume if gsm/umts is an option that HTC would have also included the correct bands but nothing surprises me these days.

spokanite said:
That is weird. I would assume if gsm/umts is an option that HTC would have also included the correct bands but nothing surprises me these days.
Click to expand...
Click to collapse
I think it has only the 1900 and 800 band. Not the 850, which you also need for 3g. Or Verizon blocked those bands despite the phone being factory unlocked.
Sent from my HTC6435LVW using Tapatalk

There's an app called "LTE On/Off", not sure if can download from play store, but included with certain Roms. It allows you to pick different bands. You can select HSPCA/GSM etc. Maybe this will help with other networks??

I'm not sure. On android central I have a thread there about the Verizon one. A person there says he tried it on straight talk with an att SIM and got hspa speeds. I tried both an att and tmobile SIM card in my Verizon one and only got edge with both apn settings. And tmobile rolled out the new bands where I live too. At the time my one was not rooted so I didn't have that app.
Sent from my HTC6500LVW using Tapatalk

could you flash a new radio? Seems like that might help.. and if the hardware is the same and you get the bootloader unlocked, root the device, and achieve s-off could you re-flash firmware, radios, hboot and rom could it potentially operate as a modified at&t (or other gsm) htc one? sorry if this is completely wrong I'm not a firmware guy.. I know basics of rom's and installations that's about it just throwing an idea out there...

Not sure, but you could unlock your cid setting it to all 1's and flash a gsm edition Rom or ruu, flash radios too. Not sure weather it would work or not depending on the Verizon model hardware but all that stuff you can do.
Turns out the guy on android central was wrong, he was also getting edge data but didn't know it.
Sent from my HTC6500LVW using Tapatalk 2

Are any of you who are trying to use the phone on AT&T running a custom rom, e.g. Cyanogenmod or Santod's Global Edition?

My one max works on at&t fine once you add the apn settings for at&t.

The Verizon one does not have the same frequiences unlocked that require you to have 3g. The DNA has pretty much similar radio frequiences and gets hspa but the HTC one has those bands locked so you only get edge, even with apn settings.
Sent from my HTC6500LVW using Tapatalk

selayan said:
The Verizon one does not have the same frequiences unlocked that require you to have 3g. The DNA has pretty much similar radio frequiences and gets hspa but the HTC one has those bands locked so you only get edge, even with apn settings.
Sent from my HTC6500LVW using Tapatalk
Click to expand...
Click to collapse
DAMN I hate Verizon!!! Except for their unlimited plan that I used about 60gb's on so far this month... ha ha ha ha

shojus said:
DAMN I hate Verizon!!! Except for their unlimited plan that I used about 60gb's on so far this month... ha ha ha ha
Click to expand...
Click to collapse
Great. It's usage like this that was a big contributor toward the unlimited data plans going away. Thanks. This is why we can't have nice things.
Back on topic, I'm curious as well if flashing new radios would do the trick.

They would have to be fully compatible and I'm not sure they would be. Maybe possible but I have not tried. Mainly one reason why they stopped selling the DNA.
Sent from my HTC6500LVW using Tapatalk

So the consensus here is that you cant do any better than Edge service when using AT&T SIM in a VZW HTC One?
See, I just swapped my Note 3 AT&T for this phone, and Id like to be able to use data. I use AT&T prepaid but my Note was always able to pickup HSPA and LTE

Have any of you ever tried doing a factory reset from hboot? That will clear out all of the network settings from verizon, and force the phone to be reprogramed from the sim.

dhaliwal925 said:
Are any of you who are trying to use the phone on AT&T running a custom rom, e.g. Cyanogenmod or Santod's Global Edition?
Click to expand...
Click to collapse
I have, with TikTak Google Plus Edition 2.0, I'm still only getting EDGE data (same as with stock) I have tried using a gsm rom, radio, and RUU. The phone wouldn't start with the different radio flash, the RUU would just boot cycle, and the rom would always fail (status 7, 6, 4).
I have spend about 20 hours on this flashing separate roms, radios and pretty much anything i can find

WiFi calling on non-branded M8

I'm considering switching from ATT, but my understanding is that wifi calling is only available with TMO branded phones. Mine is the factory unlocked model (BS_US001/0P6B12000). I'm SuperCID, so was wondering if I could emulate a TMO phone by flashing their RUU. Would I have to change my MID (if that is even possible)?

bruce7373 said:
I'm considering switching from ATT, but my understanding is that wifi calling is only available with TMO branded phones. Mine is the factory unlocked model (BS_US001/0P6B12000). I'm SuperCID, so was wondering if I could emulate a TMO phone by flashing their RUU. Would I have to change my MID (if that is even possible)?
Click to expand...
Click to collapse
yes change the mid then u can flash there ruu

[email protected] said:
yes change the mid then u can flash there ruu
Click to expand...
Click to collapse
Did u try this yet ?
I have a vas m8 running on tmo and in the viperone threads in the general HTC one m8 section, j to the an, said if I tried something like that it would go for a hard brick easy. But my be cuz my phone is a cdma variant? Who knows. I just ask.
Sent from my HTC One_M8 using XDA Free mobile app

There are a few custom ROMs that allow TMO WiFi calling. I know, and have tested, both Viper and Sky Dragon. While they are obviously not stock, they both work on my BS_US002.

Just flash T-MO RUU after SuperCid'ing. I have the same terminal and got around that issue following those steps!. Remember to do your backups.

rpimentel1 said:
Just flash T-MO RUU after SuperCid'ing. I have the same terminal and got around that issue following those steps!. Remember to do your backups.
Click to expand...
Click to collapse
I was assuming you has a gsm varient when I said change the mid then flash their ruu. At&t and t-mobile are gsm, Verizon and Sprint varients are cdma . Never mix gsm and cdma anything,if your varient is cdma don't bother looking at gsm formums at all

[email protected] said:
I was assuming you has a gsm varient when I said change the mid then flash their ruu. At&t and t-mobile are gsm, Verizon and Sprint varients are cdma . Never mix gsm and cdma anything,if your varient is cdma don't bother looking at gsm formums at all
Click to expand...
Click to collapse
op is AT&T (GSM) wants to emulate TMO (GSM) as well. what are you talking about?

rpimentel1 said:
op is AT&T (GSM) wants to emulate TMO (GSM) as well. what are you talking about?
Click to expand...
Click to collapse
Taking about me. Cuz I'm vzw and AT&T is gsm. I forgot bout that, duh... But I am able to run gsm type Rom with little to no problem....I'm just looking to see how I can enable all gsm lte bands for use. I try to drive and between towers I lose signal and can't reconnect, so I either have to toggle airplane to get it back, or just use hspa. It runs ok... But I'd like to get full potential.
Sent from my HTC One_M8 using XDA Free mobile app

rpalmerin said:
Taking about me. Cuz I'm vzw and AT&T is gsm. I forgot bout that, duh... But I am able to run gsm type Rom with little to no problem....I'm just looking to see how I can enable all gsm lte bands for use. I try to drive and between towers I lose signal and can't reconnect, so I either have to toggle airplane to get it back, or just use hspa. It runs ok... But I'd like to get full potential.
Sent from my HTC One_M8 using XDA Free mobile app
Click to expand...
Click to collapse
Sounds like some sort of Kernel incompatibility, have you tried reinstalling everything from scratch?

rpalmerin said:
Taking about me. Cuz I'm vzw and AT&T is gsm. I forgot bout that, duh... But I am able to run gsm type Rom with little to no problem....I'm just looking to see how I can enable all gsm lte bands for use. I try to drive and between towers I lose signal and can't reconnect, so I either have to toggle airplane to get it back, or just use hspa. It runs ok... But I'd like to get full potential.
Sent from my HTC One_M8 using XDA Free mobile app
Click to expand...
Click to collapse
A Cdma varient never can be full potential of the gsm varient. i use to have the sprint varient and i unlocked it to tmobile, yes it worked, but it wouldnt stay connected to tmobile, i would constantly have to manually search for tmobile network, so if i never looked at my phone it would just disconnect by itself, i received calls fine but text messages would come once i connected to tmobile again.
plus the hardware is just not capable of all the gsm bands, so to get full potential, sell it and get a gsm one

In need of a lil guidance?

Ok so I need some advice. I was finally able to root my Galaxy S6 recently with Odin/CF-AutoRoot. Now i've got a few questions before I go any farther. The main reason I wanted to root my phone was in hopes to edit my APN's and get my data working. This galaxy is on Marshmallow, the Sprint/Boost Mobile model. I bought it off ebay, when i first got it I took it to AT&T to get service on it. They got my talk/text working but not data because there was no APN options under Settings/mobile networks/etc. That option was not there. I'm hoping if I flash a rom that will restore my missing APN options.
-I need someone to recommend me a rom. I'm looking for a stable rom, preferable debloated too. I just want the phone to function as it normally should and have the apn options back.
-Also, do I need to install a custom kernal too?

This is the forum for Sprint Galaxy S6. Did you buy the Sprint model or the AT&T model.
From what I understand, they are different.
Sprint is on CDMA network and AT&T is GSM, and the two are not compatible.
Sent from my SM-G920P using XDA-Developers mobile app

DarkHorse420 said:
Ok so I need some advice. I was finally able to root my Galaxy S6 recently with Odin/CF-AutoRoot. Now i've got a few questions before I go any farther. The main reason I wanted to root my phone was in hopes to edit my APN's and get my data working. This galaxy is on Marshmallow, the Sprint/Boost Mobile model. I bought it off ebay, when i first got it I took it to AT&T to get service on it. They got my talk/text working but not data because there was no APN options under Settings/mobile networks/etc. That option was not there. I'm hoping if I flash a rom that will restore my missing APN options.
-I need someone to recommend me a rom. I'm looking for a stable rom, preferable debloated too. I just want the phone to function as it normally should and have the apn options back.
-Also, do I need to install a custom kernal too?
Click to expand...
Click to collapse
It sounds to me like you want to use the Sprint S6 on AT&Ts network. Should be possible. However, I believe it needs to be unlocked first in order to use the GSM bands. This may be one of the issues.
Secondly, I recommend doing everything yourself as there aren't many ROMs available for the Sprint S6, so tweaking everything is something you personally will have to do to make it work on AT&T.
Thirdly, why did you get a Sprint model if you wanted to use it on AT&T? I recommend talking to sprint to help you. Custom kernel has nothing to do with carriers, so using the one you have now will be fine.
IMHO: You should have done your research first. Honestly if you wanted to use it strictly for AT&T then you should have bought an AT&T variant, all your headaches and issues wouldn't exist lol. That being said, what you want is 100% feasible, but not by the average Joe. It requires some tinkering and know how and knowing how to navigate around the device.
hotwired34 said:
This is the forum for Sprint Galaxy S6. Did you buy the Sprint model or the AT&T model.
From what I understand, they are different.
Sprint is on CDMA network and AT&T is GSM, and the two are not compatible.
Sent from my SM-G920P using XDA-Developers mobile app
Click to expand...
Click to collapse
Just an FYI: You are right, but you're not fully right. lol
Sprint and Verizon CDMA phones normally have GSM capabilities for overseas business travel. In order to unlock the GSM bands, you must get the device unlocked, or tell and pay sprint that you are using it overseas. International Unlocking allows for overseas use, Domestic unlocking allows for USA GSM Carrier use. My phone is International and Domestically unlocked thanks to a very kind and generous xda member.
However, a GSM phone will not work on CDMA networks, just cause they lack the hardware. There really isn't a niche for it so they don't make them.