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, Etc. Will NOT work with CDMA Carriers Such as Verizon, Sprint, Boost. 3G HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100, 4G LTE band B1 (2100), B2 (1900), B3 (1800), B4 (AWS), B5 (850), B7 (2600), B8 (900), B17 (700), B20 (800), B28 (700), B66 (AWS-3) – Compatible with Most GSM SIM Card Carriers
