Samsung Galaxy Appeal I827 Unlocked GSM Android Cell Phone - Black/Silver 2G: GSM 850 / 900 / 1800 / 1900, HSDPA 850 / 1900 / 2100 3.2" Capacitive touchscreen Android v2.3 (Gingerbread), Qualcomm MSM7225A Snapdragon 3.15 Megapixel Camera (2048 x 1536 pixels + Font-Facing 1.3 MP 8GB, 512MB RAM + microSD Slot Expandable up to 32GB 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.