LANDVO L900 Smartphone 5.0 Inch QHD Screen MTK6582 Quad Core 1.3GHz Andriod 4.2 3G GPS OTG Unlocked Quadband 3G Dual Sim Cell Phone (black) LANDVO L900 Smartphone 5.0 Inch QHD Screen MTK6582 Quad Core 1.3GHz Andriod 4.2 3G GPS OTG Unlocked Quadband 3G Dual Sim Cell Phone (black) 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.