What will Re-Locking the Boot Loader do?
By Re-Locking the Boot Loader you are restoring your warranty, it also removes CWM recovery and TWRP recovery
How to Re-Lock the Boot Loader
1. Download and install Flash Tool Download
2. Connect your XPERIA in flash mode
3. Click BLU
4. Click ReLock
You have now Re-Locked the bootloader
2. Connect your XPERIA in flash mode
3. Click BLU
4. Click ReLock
You have now Re-Locked the bootloader