I have Gt-N7000 note mobile. I am running JB germany official rom. Suddenly my phone has restore it default imei "0049999010640000" so i can register on any network. Also, the power button problem appeared to me. When i press it for a long press the menu of restart does not pop up instead the phone just power off and if i pressed for a short one, the phone will just turn off the screen so if press it again or the home button, the phone would just open and bypass the lock screen.
Thanks for ur help guys