Kin One and Kin Two are a duo of multimedia phones with a strong focus on social networking. Both phones use a customized Windows Phone 7 interface where online social interaction is central.
The new Kin phones are set to provide a "deeply social" experience on the same platform that will bring us the first Windows Phone 7 phones. In contrast to Windows Phone 7 phones, the whole user experience will be entirely personal revolving around social networking on the go. The homescreen of the KIN phones (called the Loop) is a never-ending story of the lives of your friends. Or as the UI design team puts it "the metaphor for KIN phones is a magazine".
Kin One, codenamed Turtle, is an ultra compact, almost pebble-like slider with a hardware QWERTY keyboard that's small enough for one-handed typing. It's got a 5 megapixel camera, 4GB of internal storage, a GPS receiver and a Zune media player. It has also got multi-touch (pinch) zooming.
Kin Two, codenamed Pure, is a side-slider with a full-size QWERTY keyboard. It tops the Kin One goodies with an 8 megapixel camera with HD video recording and a photo flash. There are 8 gigabytes of storage memory on board the Kin Two.
Both the Kin One and Kin Two lack memory card slots. Instead both phones make use of Kin Studio - an online sync service that backups (and even shares) your phone's photos and videos, messages, call history, etc.
Resource: Kin website