Hi guys, Im trying to figure something out for my younger college sister. She has a Sprint plan and is interested in getting an unlocked iPhone and hooking it up to her network. I told her to ask at her local Sprint retailer, they told her its impossible, but I just want to make sure, as a lot of them think it runs only on ATT. I read that Sprint uses CDMA technology which does not have SIM cards for their phones. I don't know what this means, but its not compatible? Thanks in advance!