Unlocked Military Tough Rugged Waterproof Shockproof Quad Band Worldwide GSM 900/1800/850/1900 Dual Cards Bluetooth Cell Mobile Phones Black AT&T T-Mobile This phone is shockproof and has passed 6 feet drop test. You can shake to switch song / wallpaper and enjoy this refreshing function Bluetooth is built in to take convenience in phone calls answering even when you are on move. There are still FM radio with schedual FM record, MP3 / MP4, E-book reader and so on. It supports GSM 850 / 900 / 1800 / 1900MHZ and is unlocked for worldwide use.