Sony Xperia Sp C5303 Black (Factory Unlocked) 4.6" Hd,8 Mp, 1.7ghz Dual Core S4 Fast Shipping All the World By Fedex Sony XPERIA SP C5303 Black (Factory Unlocked) 4.6" HD,8 MP, 1.7GHZ Dual Core S4 Fast Shipping All the World By Fedex 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.