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.
Please check if your GSM cellular carrier supports the bands for this model before purchasing, LTE may not be available in the US as this is the international model: GSM850, GSM900, GSM1800, GSM1900, UMTS850 (B5), UMTS900 (B8), UMTS1900 (B2), UMTS2100 (B1), LTE2100 (B1), LTE1800 (B3), LTE2600 (B7), LTE900 (B8), LTE800 (B20).