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. Please check if your GSM cellular carrier supports the bands for this model before purchasing LTE may not be available in all areas: 3G HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 4G LTE band B1 (2 100) B2 (1 900) B3 (1 800) B4 (AWS) B5 (850) B7 (2 600) B8 (900) B12 (700) B13 (700) B17 (700) B20 (800) B28 (700) B66 (AWS-3) This device may not include a US warranty as some manufacturers do not honor warranties for international items.