Certified Used Phones carries a full line of quality AT&T used phones at great pricing! All of our AT&T used phones have been fully checked by our professionally trained technicians and are ready to be activated. All of our pre-owned AT&T compatible phones are backed by our 60 day (No Hassle) warranty & 100% satisfaction guarantee! If you are looking to buy quality AT&T used phones you have come to the right place. You don't have to sign a two-year contract to save money and we all know that financing a phone is only going to raise your bill through the roof! Buy smart, Buy Pre-Owned.