Sony pc com fix 80% of bugs
Install sony pc comp
get orginal usb cable connet the phone to laptop or computer click on update if ur on last firmware click on repair and let it install if not update to last firmware and after phone runs connect again then click repair after finish the phone runs with factory default..
Now Overheating problem
Install watchdog lite and see which app cause cpu and actually remove it if its sony app disable it..
Go to setting then more and disable NFC just turn it on when u use it
Now battery problem
Discharge ur battery to 0% now phone well turns off
Put it into charge ( don't turn phone on) wait untill it fully charged then turn on phone do this 2 time every month
I hope i helped and sry for my bad English iam trying to help 🙂
