Sony Xperia Z is one of the new releases in the Xperia line of Smartphones. The owners of Xperia Z might want to root the phone and further install the custom ROMs and add some tweaks to this phone to increase the performance of the phone. But before doing all this, it is necessary to unlock the bootloader of the Sony Xperia Z. Without unlocking bootloader, it is not possible to root the phone. So the users who want to unlock the bootloader of the Sony Xperia Z can follow the instructions given below.