I was given an ATT iphone 4 and want to unlock it (recommendations on getting unlocked for free or cheap) and use a prepaid, no contract carrier so my daughter can have a way to call us or text us in an emergency. Im in the US and looking for recommendations on 1) Prepaid carrier to use (Any will do as the coverage is pretty good for Verizon, ATT, Tmobile where she will use it most. 2) If the phone isnt unlocked, Ill attempt to try and have ATT unlock it (My family gave us the iphone 4) but if that isnt successful, who is the cheapest or free that can unlock the iphone 4? Thanks for the help everyone! I know many here can recommend/good advice!