The ZunePhone is Microsoft's flagship phone, based on the Zune HD 2.0 operating system, released in December 2008. It licenses out its operating system to vendors to create handsets for the phone. It includes an 854x480 pixel screen, 16GB/32GB memory, an a multi-touch screen. As of December 2010, there are 15,000 apps available for the phone/ZuneXD devices.