Will NOT work with CDMA Carriers Such as Verizon, Sprint, Boost Dual SIM International model phone, Does NOT have US warranty. Will work with Most GSM SIM cards in U.S. and world Including AT&T, T-Mobile, MetroPCS. LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800) HSDPA 850 / 900 / 1900 / 2100 GSM 850 / 900 / 1800 / 1900 Octa Core 1.8GHZ Adreno 506 / 32GB (24GB User) 3GB RAM Dual Rear Camera Rear Camera: 13 MP + 2 MP (f/1.8) AI + Front 16MP Camera Android 8.1 (Oreo); EMUI 8.2