First off I got my iPhone two days ago and have noticed a small piece of dust under the glass. I had read that people got their phone replaced because of this. I am going to Chicago next week and it will be within my 14 days and was wondering how easy is it for them to replace the phone, will they just give me a new one for this? I am guessing I need to bring reciept and box right? Also would they put on the powersupport screen protector for me while I was there?