Nokia Lumia 925 16GB Unlocked GSM 4G LTE Windows 8 Smartphone w/ 8MP Camera - Black - AT&T - No Warranty 3G: HSDPA 850 / 900 / 1700 / 1900 / 2100, 4G: LTE 700 / 850 / 1700 / 1900 / 2100 4.5" AMOLED Multi-Touchscreen with PureMotion HD+ ClearBlack display and Corning Gorilla Glass 2 8 Megapixel (3264 x 2448 pixels) with Carl Zeiss optics, OIS, Dual-LED Flash + 1.3 Megapixel Camera Microsoft Windows Phone 8 (upgradeable to WP8), Qualcomm MSM8960 Snapdragon, Dual-core 1.5 GHz Krait Processor 16 GB, 1 GB RAM, Non-removable Li-Ion 2000 mAh Battery 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.