Windows Phone 7 is a mobile operating system developed by Microsoft, and is the successor to their Windows Mobile platform. It launched in Europe and Asia on October 21, 2010, and is due to launch in the US on November 8, 2010. With WP7, Microsoft offers a new user interface, integrates the operating system with other services, and plans to strictly control the hardware it runs on. Microsoft unveiled Windows Phone 7 on February 15, 2010, at Mobile World Congress 2010 in Barcelona and revealed additional details at MIX 2010 on March 15. Windows Phone 7 was released to manufacturing on September 1, 2010, and the final SDK was made available on September 16, 2010.