Nokia Lumia 625 Windows Phone 8GB - Unlocked - Retail Packaging - (Yellow) Network 2G GSM 850 / 900 / 1800 / 1900. Network 3G HSDPA 850 / 900 / 2100. Network 4G LTE Network 700/850/1900/1700_2100 ready to be used with compatible carriers 4.7 inches screen, Corning Gorilla Glass 2 Internal Memory 8 GB, Micro SD expandable up to 64 GB, 512 MB RAM 5 MP Camera , 2592 x 1936 pixels, autofocus, LED flash Windows Phone 8, upgradeable to v8.1, Qualcomm MSM8930 Snapdragon, Dual-core 1.2 GHz Krait 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.