Smartphone Proximity Sensor

[Gilez]

My Sony Xperia SP's home screen button,back screen button (bottom screen buttons are not working). I tried to Calibrate it but it keeps saying 'device does not support function' please help

[MarlonUk1]

what do you mean "calibrate": are you using a custom rom?

try to restart your device by long pressing the power button.

try to repair your device using PCC

[Gilez]

I have restarted my phone many times already. The probelm is my home home screen button is unsensitive same with the buttons next it. Is there any ways of fixing that?