Within your return period you can only take the phone back to the place you bought it from (ie if you buy from verizon you cannot take to Apple store to return). This only applies to the return policy. Apple still honors warranties through their Apple Stores. They will also tell you that you will be given a refurb phone if you take it in for warranty covered issues even within your return period. Since you are buying a the phone on launch, you need not worry about receiving a refurb as all "refurbs" in that time frame will be guaranteed new.