Important: RG702 Do NOT compatible with AT&T, Verizon,Sprint,Boost,Virgin. RG702 is not a 4G phone, only Support 2G GSM Frequencies 850/900/1800/1900 MHz and 3G WCDMA Frequencies 900/1900/ 2100 MHz. So please make sure your SIM card support one of these Frequencies before you add it to cart. RG702 is compatible with most of the prepaid unlock GSM service provider, like T-Mobile, H20, ptel, Cingular and All 2G GSM Networks Worldwide. IP-68 waterproof Certification. Submersible up to 1.5 Metres for 1 hour, Water Shock Dust Proof, Military Grade Waterproof smartphone, dust proof and shock proof; Military Standard Compliant: Mil-Std 810G Compliant. Shock Test : 1.5 Metres Drop Test. CPU MT6582 (1.3GHZ Quad Core) Android v4.4. Dual SIM. 4.5" IPS HD Main Screen Capacitive Touch Panel,Resolution:854 x 480 Pixels. Supports Glove Operate on Capacitive TouchScreen. support USB OTG,can be connect to U disk, U driver to play movies.