Hey guys. As I mentioned in my other post that I was having "USB not recognized" error. So I gave it to Sony centre, they changed the mother board and reinstalled the software. Now after that, my phone is not vibrating. No vibration when I hold screen for few seconds, when I shut down my phone, when I receive a call or msg nothing. I checked my settings, they are fine. Also my speaker's volume is very very low on everything, from alarm to music to ringtone. ANy solution??
