Samsung B2100 Unlocked Quad-Band Phone, Extreme Anti-Shock, Waterproof, Built-in Flashlight, Bluetooth - International Version - Black Waterproof Anti-shock MP3/MP4 1.3MP camera Flashlight 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.