With hardware built by Sharp, the Kin will come in two models: the Microsoft Kin One, and a wider, more powerful model called Microsoft Kin Two. The devices will be sold exclusively in the US by Verizon from next month and will hit Europe in October via Vodafone.
Speaking at a San Francisco launch event on Monday, Microsoft's Robbie Bach billed the devices as smartphones designed for social-networking and video-obsessed users. "We knew we had created something very special for people when we saw the reactions to people from our prototype," said Bach, president of the Entertainment and Devices Division.
Both versions of the phone come with a slide-out keyboard, but the Kin Two has a wider keyboard, more memory and a better camera that can shoot high-resolution video. The Kin One comes with a 5-megapixel camera and the Kin 2 with an 8-megapixel camera.
Looking to leverage its software expertise, Microsoft is adding a number of features designed to help the phones integrate with social media Web sites such as Facebook, Twitter and MySpace. The Kin's homepage can weave together different social media feeds and using a feature called Kin Spot, users can zoom in on specific people in their networks.
Another feature, called Kin Studio, will give users a simple way to organize their photos, text messages and data, in what Microsoft calls a "personalized digital journal," and then store all of this information online.
Kin will also be integrated with Microsoft's Zune digital media marketplace.
Microsoft and Verizon are not saying what the first Kin devices will cost when they are released next month.
Vodafone will initially sell the devices in the UK, Germany, Italy and Spain.
See also: Microsoft Kin One review
See also: Microsoft Kin Two review