How to Unroot the Thunderbolt

Need to exchange or sell your phone? Want it back to completely stock? Follow thesesyinstructionsand you are there!By EditAndroidI. Flash the Stock Rom1. Download the following file and save it somewhere on your computer.MR1 RUU – Stock Firmware(do not extract the file, lve it as a .zip file)2. Plug the phone in via USB cable and mount thesdcardso we can transfer files to it.3. Copy the file you just downloaded and place it on the root of your SD card (not in anyfolders, just on the sd card itself)4. Unplug the phone from the computer.5. Power off the phone.6. Once completely powered down, hold the volume down button and power button and keep holding them until the phone boots intobootloadermode).7. Once in bootloader, press the power button to enter fastboot. The phone should automatically find the file and ask you if you would like to install it. Press volume up to install.8. When fully updated, select reboot and wait for the phone to reboot.II. Flash the Stock HBoot1. Download the following file and save it somewhere onyourcomputer(it has the same name as the first file you flashed so you might be asked if you want to overwrite the original file, say yes).Stock HBoot(do not extract the file, lve it as a .zipfile)2. Plug the phone in via USB cable and mount the sd card so we cantransferfilesto it.3. Copy the file you just downloaded and place it on the root of your SD card (not in any folders, just on the sd card itself) (you will be asked if you want to replace the original PG05IMG file, say yes to replace the original with the new one)4. Unplug the phone from the computer.5. Power off the phone.6. Once completely powered down, hold the volume down button andpowerbuttonand keep holding them until the phone boots into bootloader mode).7. Once in bootloader, press the power button to enter fastboot. The phone should automatically find the file and ask you if you would like to install it. Press volume up to install.8. Once it’s done, hit Reboot.9.To verify everything worked correctly, turn off the phone.Once completely powered down, hold the volume down button and power button and keep holding them until the phone boots into bootloader mode). At the top of the screen, you should see”Mecha XD Ship S-ON”.10. So long as that is there, you are now running a completely stock phone!