Anyone else getting this problem? I have full reception when using the phone, but immediately as i turn off the screen and have it sleep, it almost completely drops the signal. And then after a few seconds of the phone being on, its fine again. This normally wouldn't be a problem, but I have had numerous times when I've completely missed a call with no ring because it dropped the signal as it was 'sleeping' even though I was in my apartment in an area that should be full bars. Only way I have been getting it to stop is with a battery pull, but that only works for a very temporary time of less than a day before its acting up again.