NOKIA 6820 UNLOCKED TRIBAND FULL KEYBOARD GSM CELLPHONE [ WILL NOT WORK WITH ATT ] INTERNATIONAL VERSION- NO WARRANTY. GSM 900 / 1800 / 1900 WILL NOT WORK WITH ATT FM RADIO 5-way joystick FULL KEYBOARD. 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.