Hi, today i updated my galaxy nexus on 4.2.2 - MIUI 3.7.5, and when my phone ask me for PIN code, i entered correctly but it always show "Incorrect PIN Code". Even when i entered more than 3 times "Incorrect PIN Code", it didn't want the PUK code, and continue to displayed the same "Incorrect PIN code". Whatever i entered, it displayed that ... Even i delete, reset ALL my data and reinstall the phone, it had the same problem. I tried my SIM on another phone - work. I tried SIM with another mobile operator on my phone - work, but when i tried another SIM with the same mobile operator as mine - didn't work. Can U help me to resolve this strange problem ? If it matters, Im on VIVACOM Bulgaria(mobile operator).