Xperia 10ii - How do I make calls without cutting people off?!

[Hemmingjak]

Whenever I make or receive calls, my screen doesn't lock and is forever flashing.  I also inadvertantly put callers on hold or mute without realising.  Is there a fault with my phone's sensor or is there a way to lock the screen during calls.  I read that the phone should automatically lock the screen when it senses it is close to the face.... thanks

[Jess.09]

Did you try to run the proximity sensor test to check if it is an issue with the sensor,  in Settings > Support > Xperia tests?

[Uliwooly]

@Hemmingjak 

Do test the proximity sensor as suggested by @Jess.09 , keep in mind that if the proximity sensor it's not in "contact/close proximity" with your face/ear, it won't lock the screen.