Before i start let me just say im super OCD when it comes to my stuff..... Ok so I have noticed an annoying bit of dirt/dust underneath the glass panel on the back case near the iPhone logo. Im thinking of getting it replaced, i got it on friday so im well within the 30 day period to bring it back. My question is, when i get it replaced will it be replaced with a brand new unit or will it be a refurb? and also, will i have any problem getting it replaced? do Apple stores keep new stock in the back especially for replacements? im in the UK by the way. thanks!