Agreed, that is y I said it is buyers equal responsibility. But the truth is that this phone is very notorious on root and Ota. So all the ones that I have sold I have disabled the app from app info and informed about the ota thing. May b it's a learning for us all who are importing and selling phones. BTW, the gsm unlock can also be done on kitkat firmware.
Yes unlocking can be done within minutes on both 4.2..2 and 4.4.2 using IOROOT.