I recently sold my iPhone on Ebay. The buyer just contacted me and said he wants to return it because it does not work on their network (Alltel - CDMA) Here is the dilemma: Where the carriers are listed - Alltel is listed there (which does operate a GSM network). But where it says technology - it has GSM And in the description I said very clearly: "Works with any GSM/Sim card Network Just insert sim card and enjoy!" My question is - what is the right thing to do? My mistake or theirs? Do I have to refund the money?