Samsung Galaxy S4 Active i537 AT&T GSM Unlocked Android Smartphone - Orange IP67 certified - dust and water resistant / Water resistant up to 1 meter and 30 minutes Oversized 5.0 Inch Touchscreen Display / Corning Gorilla Glass 2 1.9 Ghz QUADCORE Processor 3G 850 / 1900 / 2100; 4G LTE 700 / 850 / 1700 / 1900 / 2100 / 2600 13 MP Main camera and secondary front facing 2 MP camera w/ 1080p HD video recording capability 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.