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[Q] Sony Xperia TL [LT30at] - Need to free it from AT&T

10th April 2014, 09:56 AM   |  #1  
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Hello Community!!

Noobiest noob here. Please forgive my ignorance.

Sony Xperia TL [LT30at] AT & T phone.
Android version: 4.1.2
Build: 9.1.F.1.120


Here is my issue:

I now need to use this phone in India with a different network provider, but i don't want to spend money on unlocking the phone for a new sim card. I read a bit about flashing a custom ROM and watched Jeremy Phan's video: "3 ways to root your (xperia) android: tool kits, kernel flashing, recovery"

I installed sony's pc companion and update service, i also installed the flash tool on my machine.

a) will flashing the phone do the trick?
b) if so i'm having a tough time finding the right firmware for this phone. Please link me to a robust and hazel free firmware for my phone.

thanks a ton
micky
10th April 2014, 12:53 PM   |  #2  
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Hi Micky,

You cant unlock your phone (remove SIM lock) from the operator by reflashing it. You will need an unlock code for that. A legal way is to obtain it from AT&T if your contract is ended, the other one is to buy it, e.g. on eBay. Once you'll get it, just enter a simple key combination to get into service menu, go to appropriate menu item and enter that code there, after that your phone is unlocked, no reflash needed.

Hope that helps.
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10th April 2014, 01:47 PM   |  #3  
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Hi summer,

Thanks a lot for your insight. I've been searching all the corners of the internet for a while now, with a vengance I think it should be time to drop those efforts.

Please bear with me, i'm trying to think out loud here - Is there no way i can tweak the phone to accept any sim card? Like by disabling a few settings or hard coding some part after gaining root access?

Buying an unlock code is not an option for me at this point, and i don't want to use the phone just to check email and take pictures

many thanks
10th April 2014, 03:31 PM   |  #4  
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SIM lock information is not stored somewhere in firmware, which you can access by gaining root permissions. I assume there may be some tricks similar to Turbo SIM in iPhone where you can emulate the correct SIM, but its definitely not worth it.
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