Samsung Galaxy Note 4 SM-N910F Factory Unlocked Cellphone, International Version, Black GSM (2G) GSM 850 MHz, GSM 900 MHz, DCS 1.800 MHz, PCS 1.900 MHz UMTS (3G) B1 (2100), B2 (1900), B5 (850), B8 (900) 4G FDD LTE B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B17(700), B20(800) Unlocked cell phones are compatible with GSM carriers such as AT&T and T-Mobile, but are not compatible with CDMA carriers such as Verizon and Sprint. This cell phone may not include a US warranty as some manufacturers do not honor warranties for international version phones. Please contact the seller for specific warranty information.