FWIW I haven't had a single problem like this since I got a hard case for my phone (HTC Desire HD) with raised edges. Of course this changes the aesthetic quite

FWIW I haven't had a single problem like this since I got a hard case for my phone (HTC Desire HD) with raised edges. Of course this changes the aesthetic quite a bit - a trade I'll make for the protection of the case - and doesn't help if your phone has no proximity sensor, but it is at least a partial solution.