Originally Posted by r3vange
Hello, you must have seen thousands of those threads but I really hope someone can help me. I have a T-Mobile USA One S which has been sim unlocked. Several months ago I decided to root it. I got the One S pack with the TWRP. However not long after I realized that all of those custom ROMs and operations weren't really my cup of tea mainly because I couldn't install the Jellybean system update. When I down it, my phone automatically goes into TWRP and when I try to flash it, nothing really happens. So here's me seeking your help. How can I revert my phone to stock with the stock bootloader. Please if you can try to explain it as if you are explaining it to a 3 year old. Best regards.
Pretty easy, just have to relock the bootloader and run a RUU.exe. This should return you to stock and put the stock recovery back.
When you run the RUU.exe on your pc it will give you instructions on what to do.
If it fails you might need to also put back the stock recovery on before running the RUU.exe.
RUU_Ville_U_JB_45_S_TMOUS_3.14.531.11_Radio_1.13.5 0.05.31_10.30.50.08L_release_309489_signed_ICS_2.e xe
To lock the bootloader.
Go to bootloader-- with phone off, press and hold volume down and press power.
with phone plugged into computer, phone should say Fastboot USB. (if it says HBoot use volume keys to highlight hboot and press power to switch to fastboot)
Console command on PC
from fastboot folder, press shift and right mouse click and select open command window here.
fastboot oem lock
this assumes you have fastboot, adb files on pc
in this guide it has fastboot files
Stock Recovery (bootloader needs to be unlocked)
the SECOND download is the stock recovery
flashing a recovery,
put the recovery.img in the fastboot folder
fastboot flash recovery recovery.img
you will need to rename it to recovery.img or type out exactly the name of the file you put in the fastboot folder.
You can also run the RUU.exe when your phone is in bootloader. Fastboot USB mode