Doogee TITANS2 DG700 Waterproof Quad Core Android 4.4.2 MTK6582 Unlocked 3G Smartphone Water -dust proof IP67. The rigidity of metal, the softness of skin 4.5" QHD capacitive Screen, 540*960 IPS OGS MT6582(Quad-core 1.3Ghz Processor),1G RAM+8GB ROM, Android 4.4.2 OS Network; Band (WCDMA) 850/1900/2100& (GSM)850/900/1800/1900 Support TF cardupto?64GB?extended (Not Included) Support Dual SIMs dual standby, Ordinary SIM, Micro SIM 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.