Samsung Galaxy Fame Unlocked Phone, Pearl White 3G HSDPA 900/2100 QuadBand GSM Bluetooth Wi-Fi Auto-focus, Geo-tagging, touch focus, face detection 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.