Currently Being ModeratedJul 10, 2012 1:18 PM (in response to Kiylz)
Did you try removing your screen protector? Improperly made screen protectors will block the proximity sensor.
Currently Being ModeratedJul 10, 2012 1:28 PM (in response to randers4)
Yes. I've had the phone 14-15 months and it's only over the last month it started to happen. I've tried everything! Looking at forums on here it's seems to be an issue lots of people are having
Currently Being ModeratedJul 10, 2012 2:36 PM (in response to Kiylz)
It's possible that your proximity sensor has failed. If it were me, I would make an appointment with the genius bar at a nearby Apple store and have them take a look at it. If you do have a hardware issue and the phone hasn't been damage or jailbroken they would sell you an out of warrantly replacement for $149 (US). If you jailbreak your phone you won't have this option, and you will have voided your warranty, couldn't get support in these forums, may not be able to update your phone in the future or may brick it if you try, etc. etc. (http://support.apple.com/kb/HT3743).
Currently Being ModeratedJul 10, 2012 11:10 PM (in response to randers4)
Hi. No I have had the sensor replaced for a new one and it still doesn't work ( as in my initial post) I do not want to jailbreak at all, but from googling this issue downloading calllock appears to be what everyone is doing but you can only get this from cydia??