My wife's iPhone started acting weird. The proximity sensor quit working, so the phone didn't know when she had it up to her ear on a call. The screen wouldn't deactivate, so when her face would touch the screen, it would either hit mute, hang up, or start another call. We went to the Apple Store in Cherry Creek mall today, and we're told that we'd have to wait at least an hour, and then it would cost $129 to fix. We then saw a store down the hall called "Cellairis". The nice lady there said she could repair it on the spot for $35, and was done in about 10 minutes. Perfect job.