Samsung Galaxy S3 Mini G730a 8GB Unlocked GSM 4G LTE Android 4.1 Smartphone - Blue 2G: GSM 850 / 900 / 1800 / 1900, 3G: HSDPA 900 / 1900 / 2100, 4G: LTE 700 / 850 / 1700 / 1900 / 2100 4" Super AMOLED Capacitive Multi-Touchscreen Android v4.1.2 (Jelly Bean), Dual-Core 1.2 GHz Processor 5 Megapixel Camera (2592 X 1944 pixels) w/ Autofocus, LED Flash + Front-Facing VGA Camera + Video Internal Memory: 8GB, 1GB RAM + microSD Slot Expandable up to 64GB 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.