Samsung Galaxy S3 Mini GT-i8200 8 GB - Unlocked (Titan Gray) GSM 850/900/1800/1900; HSDPA 900/1900/2100 5 MP camera with led flash Geo-tagging, touch focus, face and smile detection, panorama Card slot micro SD, up to 32 GB Super AMOLED capacitive touchscreen, 16M colors 480 x 800 pixels, 4.0 inches (~233 ppi pixel density) Android 4.2.21.2 GHz dual-core Cortex-A9 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.