Sometimes when I remove the phone from my ear, it doesn't turn the screen back on. So I put it up to my face, then remove it, and it only turns on the backlight at a VERY low level. Almost as if it was the minimal backlight available to the screen (it could be, but I have auto backlight on, and it's ALWAYS brighter that that). The only way to get it to light up normally again is if I hit the End key and lock the phone and turn it back on. Anyone else having this problem? 2.1 OTA.