Unlocked cell phones are compatible with GSM carrier such as AT&T and T-Mobile, but are not compatible with CDMA carriers such as Verizon and Sprint. This device does not include a US warranty as this is International model.
3G UMTS/HSPA+ (B1, 2, 4, 5, 8) - 4G LTE B1(2100), B2(1900), B3(1800), B4(1700), B5(850), B7(2600), B28(700) - Dual SIM (Nano-SIM, dual stand-by)