Samsung Focus: In late 2010, Samsung was among the first companies to offer a smartphone powered by Microsoft's new Windows Phone 7 mobile operating system.
At the same time, one of the more exciting developments is Windows Phone 7 Series, which is said to be a successor to the Windows Mobile 6.5 platform.
It is possible that Windows Phone 7 Series and Windows Mobile 6.5 could co-exist, at least in the short term.
Steve Ballmer, CEO of Microsoft, announced the Windows Phone 7 Series at the Mobile World Congress in Barcelona.
Unlike Windows Mobile 6.5 programs, which are compatible with several generations of the platform, users cannot install their Windows Mobile programs on Windows Phone 7 Series.