Sony Xperia E C1504 Unlocked Android Phone--U.S. Warranty (Black) 3.5 inch display with 320 X 480 pixels, 262,000 color TFT Standby Time : Up to 530 hours: Talk Time: Up to 6 hours 3.2 MP camera with 4X digital zoom and geotagging CPU/ Processor : 1 GHz Qualcomm Snapdragon processor Google Android 4.0 Operating System 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.