The listing, Kyocera Echo Dual Screen Android Smartphone for Sprint has ended.
this listing is for a fully functional Kyocera Echo for the Sprint carrier. it doesn't use a sim so I'm not sure if it can be unlocked for another carrier, although it might be able to be put on some sort of prepaid plan. i know this phone is old, but it has a very neat and still unique form factor. under the main screen is a second screen, lift the hinge and pull apart and then snapping the screens together makes for a unique user experience. open an app and then tapping both screens allows you to multitask by using two apps (one on each screen) simultaneously.