Sony Xperia Z1 C6903 16GB Unlocked GSM 4G LTE 20MP Camera Water-Proof Cell Phone with Shatter-Proof Glass - Purple New, Unlocked, International GSM model. Will work with AT&T and T-mobile. Will not work with Verizon or sprint. Please check if your carrier support these GSM networks before purchasing: 2G bands GSM 850 / 900 / 1800 / 1900 3G bands HSDPA 850 / 900 / 1700 / 1900 / 2100 4G bands LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800) 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.