As an owner of an Xperia Z from Sony I know how it could be done so don't give me wrong facts. fastboot oem unlock 0xKEY would've been the perfect way. This would've given the geeks around here the possibility to do what they want. Now we can't do this. If you were unable to implement this in time, you should provide the bootloader image yourself. Also a way you've not taken. From an open company I expect this. I'm done. I'm writing developer care right now to pull my app from your store and sell my device. Good luck satisfying your MFE customers