Share your experience!
@Myy
Is it similar to this?
/t5/Xperia-Z2/Z2-sound-problem-after-6-0-1-upgrade/m-p/1126406#U1126406
or this
/t5/Xperia-Z2/Bluetooth-audio-transmission/m-p/1119558/highlight/true#M37800
backup everything and repair the phone with XC and report back
Xperia Companion (XC)
Software Repair Guide
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
i done factory reset and check but issue is still same
wifi also somtime dropping