Originally Posted by teddy74eva View Post
Phone is vibrating when you push and hold the off button under the back of the phone, it may be broken and its hardware issue, you must take it to sony centre

Sent from my C5303 using XDA Premium 4 mobile app
Thanks for the quick reply. I have noticed that the button looks a bit damaged but i had no idea this could be the problem. I will see if i can get it repaired.