Sony Xperia Z3 D6653 GSM Cellphone Unlocked, International Version No Warranty, Black 2G Network GSM 850 / 900 / 1800 / 1900 3G Network HSDPA 850 / 900 / 1700 / 1900 / 2100 4G Network LTE 700 / 850 / 900 / 1800 / 2100 / 2600 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.