Samsung Galaxy s7562i S Duos Trend Duos Dual Sim - Factory Unlocked- White Andriod Cellular Band 3G - 900 / 2100 Mhz 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.