HOW TO RELOCK BOOTLOADER : NOTE: Flash back stock kernel using "Repair" option in SEUS or by using Flashtool (if using Flashtool either flash stock firmware or flash the appropiate .ftf file): If you relock your bootloader while using a custom kernel your phone will be bricked!! Considering that you have Flashtool installed with Gordan Gate's already lets begin how to Relock your Bootloader: 1.Turn off your phone. 2. Launch s1tool above 3. Click on Restore button and then connect your phone to the PC in flash mode (press and hold back button while connecting your phone to the PC). 4. Wait for the process to complete. Congratulations! You now have relocked your bootloader! 5. To check, open s1tool.exe, click IDENTIFY button, turn off your phone, connect it in flash mode to the PC (press and hold back button while connecting your phone to the PC. The LED on your phone should flash green). 9. Continue holding back button until there is some output. Example of output: 9/21/2011 7:29:46 PM Welcome to S1 tool. 9/21/2011 7:30:04 PM 9/21/2011 7:30:04 PM TO CONNECT NEXT PHONES 9/21/2011 7:30:04 PM X10 Xperia,E10 Xperia Mini,E15 Xperia X8,U20 Xperia Mini Pro 9/21/2011 7:30:04 PM LT15 Xperia ARC,MT15 Xperia NEO,R800 Xperia PLAY 9/21/2011 7:30:04 PM PRESS AND HOLD "BACK" BUTTON... 9/21/2011 7:30:04 PM 9/21/2011 7:30:04 PM PLEASE ATTACH TURNED OFF PHONE NOW 9/21/2011 7:30:04 PM 9/21/2011 7:30:30 PM 9/21/2011 7:30:30 PM RUNNING S1_EROM VER "R8A029" 9/21/2011 7:30:30 PM SOFTWARE AID: 0001 9/21/2011 7:30:30 PM LOADER AID: 0001 9/21/2011 7:30:32 PM FLASH ID: "0020/00BC" 9/21/2011 7:30:32 PM LOADER VERSION: "R4A045" 9/21/2011 7:30:32 PM 9/21/2011 7:30:32 PM MODEL (from GDFS): U20i 9/21/2011 7:30:32 PM SOFTWARE VERSION: 1235-3411_2.1.1.A.0.6 9/21/2011 7:30:32 PM CUSTOM VERSION: 1238-7170_R4B 9/21/2011 7:30:33 PM FILESYSTEM VERSION: WORLD-1-8_2.1.1.A.0.6 9/21/2011 7:30:33 PM SERIAL NO: CB511LPY6M 9/21/2011 7:30:33 PM 9/21/2011 7:30:33 PM SEMC SIMLOCK CERTIFICATE 9/21/2011 7:30:33 PM Elapsed:28 secs. ------------------------------------------------------------------------------------------------ If the line RUNNING S1_EROM FROM VER "#8A02$" has a lowercase "r" letter replacing the "#" (RUNNING S1_EROM FROM VER "r8A02$"), your bootloader was not successfully relocked .If it has an uppercase "R" replacing the "#" (RUNNING S1_EROM FROM VER "R8A02$"), your bootloader has been successfully relocked . Note: The value of the "$" is dependent on an unknown factor. The unknown factor doesn't matter to us.
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