Samsung Galaxy S7562i S Duos Trend Duos Dual Sim - Factory Unlocked- Black Andriod HSPA 900/2100 Quad Band 850/900/1800/1900 No Front Camera 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.