Samsung Galaxy S4 I337 16GB 4G LTE Unlocked GSM Smartphone - AT&T Version (Blue) 13 Megapixel HD Camera Oversized 5.0 Inch Touchscreen Display 1.9 Ghz QUADCORE Processor 4G LTE Capable LTE (700 MHz Class 17 / 1700 / 2100) NOT FOR CDMA LIKE VERIZON OR SPRINT Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.