Share your experience!
Proximity sensor is not working in my Xperia ZL (called Xperia ZQ in Brazil). Please, I need a solution.
Have you tested the phone using Xperia diagnostics?
https://play.google.com/store/apps/details?id=com.sonymobile.androidapp.functiontester
Check that you haven't any cover or screen protector that covers the proximity sensor on the top of the phone.
