[Q] Unlocked AT&T G3 using on Tmobile - which rom version to use? - G3 Q&A, Help & Troubleshooting

I just started using an AT&T branded G3 unlocked on Tmobile. I have no idea if I can flash Tmobile ROMs or if I need to stick with roms only built for AT&T? Someone please clear this up for me once and for all. Thanks!

I wouldn't flash anything thats not specifically made to work with your device. Tmobile g3 has an unblocked bootloader all other g3's are locked currently. Flash something thats not made for your specific device and you may have a paperweight.

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Att rom on t-mobile

So task just released a new 4.3 rom for att but unfortunately not for t-mobile, so my question is how would I go about using it on my t-mobile phone, since the devices are almost identical I figured it wouldn't be hard, the only thing I'm worried about is the bootloader, would I just have to flash the rom and put a t-mobile bootloader and kernel on it? Or is there more than that?
Try here
http://forum.xda-developers.com/showthread.php?t=2295557

**Quick Question!! Please help!!

I have a Verizon G3 that is unlocked with my AT&T sim card. When downloading device specific files do I want to use all Verizon files since it's a VS985 (Verizon Model #) or do I have to download stuff for AT&T model version. I assume I would use Verizon but I just want some assurance. If anyone could answer this for me I would appreciate it.
TyJones916 said:
I have a Verizon G3 that is unlocked with my AT&T sim card. When downloading device specific files do I want to use all Verizon files since it's a VS985 (Verizon Model #) or do I have to download stuff for AT&T model version. I assume I would use Verizon but I just want some assurance. If anyone could answer this for me I would appreciate it.
Click to expand...
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If you're still running the stock ROM that came loaded with Verizon software, you would have to download Verizon files. If you're running a different ROM then it's really at your discretion. You can try the AT&T files, but changing the SIM won't make a difference with the software of the phone
hoponpop said:
If you're still running the stock ROM that came loaded with Verizon software, you would have to download Verizon files. If you're running a different ROM then it's really at your discretion. You can try the AT&T files, but changing the SIM won't make a difference with the software of the phone
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So basically once I have it rooted with recovery installed I can flash AT&T (D850) G3 custom ROM's? Thanks for the quick response.
No.
You cannot currently load a custom recovery except on the T-Mobile version of the G3. Even if you could, you couldn't install a GSM phone's firmware onto it and expect it to boot.
Sent from my VS985 4G using Tapatalk

[Q] VZW G3 on Tmo, which ROM?

As the title states, I am using my Verizon LG G3 on T-Mobile. I have everything working fine on the stock Verizon firmware. I want to load a custom ROM, but unclear on if I should load a VZW or Tmo version. I assume I can make a VZW version work, but I would prefer to run a Tmo version. Is it possible to load a Tmo ROM on here or should I stick with the VZW tailored stuff? Thanks.
The bootloader is locked on the Verizon version of this phone. You will not be able to install any rom at this time
You should've bought a Tmo G3 from the start, its bootloader is unlocked and you can load anything you want on it.

[Q] Unlocked LG G3 Question

I have never unlocked a phone so I apologize if this is a dumb question, but if have a T-Mobile G3 but am on ATT will installing a Rom for ATT model brick my phone or do I use D851 Roms and change APN settings to make it work?
dmd3746 said:
I have never unlocked a phone so I apologize if this is a dumb question, but if have a T-Mobile G3 but am on ATT will installing a Tom for ATT model will it brick my phone or do I use D851 Roms and change APN settings to make it work?
Click to expand...
Click to collapse
Flashing a rom for a diferent model will brick your device. Flashing a rom (in generally - e.g. CyanogenMod) will not affect the carrier (sim/net) lock. If your phone is sim/net locked you need a valid unlock code to use it with another carrier's sim.
Thank you and sorry for the question here I realized they asked to have questions placed in Q&A section I won't do it again.
dmd3746 said:
I have never unlocked a phone so I apologize if this is a dumb question, but if have a T-Mobile G3 but am on ATT will installing a Rom for ATT model brick my phone or do I use D851 Roms and change APN settings to make it work?
Click to expand...
Click to collapse
do you understand your own question? Are you talking about sim unlocked phone? You are sim unlocked at this moment because you are on ATT. Are you asking about rooting your phone then? The bootloader is not locked on TMO G3. But like the answer given, you can not install a rom on an TMO phone that is not specifically developed that TMO phone. I have TMO G3 and swapped over to ATT several months ago. I was running a custom rom well before I switched to ATT but its a rom developed for TMO G3.
I suggest a lot of education before going down the rooting path and custom roms.
I have flashed a AT&T Rom on my T-Mobile phone. I had to flash the T-Mobile kernel after flashing the Rom, but it did work. I also had to go and configure the apn
I've done this on other phones,but have been scared to try it on my G3. No offense, but I need someone with more then 4 posts to verify this
Sent from my LG-D851 using Tapatalk

[Q] at&t flashed to tmobile

Can I flash a tmo ROM on my unlocked d850 without bricking my phone I'm currently using it on tmo network but I rather have it all T-Mobile
No. Only flash ROMs for D850.

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