One of the guides I have read claims that by using flash tool Sony will be unaware that the BL has been unlocked. Correct me if I'm wrong but I don't believe the unlock code can be generated without requesting it from Sony.
Flashtool simply automates things you normally do by typing adb commands. I unlocked 3 BL in Z2's and it was perfectly safe for me. Just be sure not to disconnect phone from computer during this and everything should be ok
Not too long ago, Google added the ability torun select Android applications on … more
19 Sep 2014
By Tomek Kondrat
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?