i got a serious wired problem with my xperia z, it started yesterday, with the Sim card disconnect and connected a couple times, after that it just just down, when its off i try to turn it on again, and it come to the sony logo a couple sec later it shut down. now the the wierd thing comes. When my phone is off, and i cant do anything, i connect the charger, and the battery logo pops up so i press power button, and it boost up normaly. but this happen 4 times yesterday and 6 today. a month ago i installed stock 274 ftp.
.274 Stock firmware
hope somebody can help me!