Cant unlock or lock phone

[Dule93]

I have problem with power button ,i need to press it 20-30 times to unlock or lock phone.I thinked its software error so i reseted it  to factory settings,but that didnt helped.

Any solutions? Or i need to take it to retailer?

[Uliwooly]

Take it back to the store or contact Sony directly

http://www.sonymobile.com/global-en/support/contact-us/