Having the same problem here. Like OP, I switched apps, thinking it was the app's fault, but whether I use GOSMS, Handcent, or stock, the flaky behavior continues. My phone is unrooted.
Sent from my EVO using Android Central Forums
I don't think this is an EVO-specific issue, I was also getting this error on occasion when I was using the Galaxy S II. It's either a Sprint network problem or it's tied to a specific app I have yet to pinpoint.
Lol, the error came up as I was typing the above . Hmm, wonder if it's Google...
Anyone had an issue with the proximity sensor not working during calls? And by not working I mean the screen does turn off, but people on the other end of the convo could hear touch tone sounds when I hold the phone to my ear (I couldn't hear the sounds). Seems as if contact with my face would...