4.5'' IPS IP68 Waterproof Dual SIM Rugged Phone Android 4.4 8MP 3G GPS MTK6582 (2G :GSM 850/900/1800/1900 MHZ ( Quad band) 3G: WCDMA850/1700/2100;TD: A/F ) GSM 850/900/1800/1900MHz; 3G: WCDMA850/1700/2100;TD: A/F Battery capacity: 3600mAh(Large capacity Long Standby ),Charging time: 2 hrs, Standby Time About 2~3 days Sim Card:Dual SIM Card Dual Standby, OS Android 4.4.2 Camera Dual Cameras, 5.0MP front camera, 8.0MP back camera with flashlight,USB3.0 high speed 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.