So here's the rundown: I have a week 25 32GB iPhone 4. Everything on the phone is just fine. I mean, like all phones I drop signal but I keep a dust-collecting bumper on it plus I'm in a great service area so I'm not too worried about that. No green blobs (that I know of) and no severe off-white balance issues (some yellowing with flash, that's about it.) None of this dust under the screen, or anything of that sort. Now I am having a severe proximity sensor issue which I've tried all the fixes on our side, but nothing works. Apple has already agreed to replace it with a new unit but I'm just kind of in a decision-making pickle. I do have a hairline scratch that looks to be under the glass (I've had it there since day 1) and that is driving me insane on top of the sensor issues. So my dilemma is do I try my luck at replacing the phone for a newer unit to fix my OCD-scratches and possibly the proximity sensor or do I accept the fact that the newer unit could have more problems then this one and it's not worth the risk? I'm really torn on this, or I would of made the decision myself already so anyone's experiences and/or input would greatly be of help.