HTC One M8 16GB (FACTORY UNLOCKED) international version (Red) [No warranty] New, factory unlocked, GSM international phone. Manufacture warranty! Please check if these bands are supported with your carrier prior to purchasing. 2G Network GSM 850 / 900 / 1800 / 1900 3G Network HSDPA 850 / 900 / 1900 / 2100 4G Network LTE 800 / 900 / 1800 / 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.