Windows Phone 7 was announced in 2010 and released by Microsoft as the successor to Windows Mobile. It featured a new "Metro" interface and supported 25 languages at launch. Several updates were released between 2011-2013, including Windows Phone 7.8 and Windows Phone 8 which moved to the Windows NT kernel and supported new hardware. While the Windows Phone platform struggled with a lack of applications, Microsoft made efforts to attract developers through programs and marketing.

1. Rohan Bansal
Sunny Kumar Srivastava

2.  Microsoft’s new mobile OS
 Successor to Windows Mobile
 Based on Windows CE kernel
 Released on November 8, 2010
 Supports 25 Languages
 Offers a new user interface with
its “Metro” design.

3.  Windows Phone 7 was announced at Mobile World Congress
in Barcelona, Spain, on February 15, 2010, and released
publicly on November 8, 2010 in the United States.
 Microsoft released an updated version of Windows Phone 7
“Mango", in May 2011. The update included a mobile version
of Internet Explorer 9 , multi-tasking of third-party apps ,
Twitter integration and Windows Live SkyDrive access.
 A minor update released in 2012 known as "Tango", along
with bug fixes, lowered the hardware requirements to allow
for devices with 800 MHz CPUs and 256 MB of RAM to run
Windows Phone.
 In January 2013, Windows Phone 7.8 was released

4.  On October 29, 2012, Microsoft released Windows Phone 8
 Windows Phone 8 replaces its previously Windows CE-based
architecture with one based on the Windows NT kernel with
many components shared with Windows 8, allowing
applications to be easily ported between the two platforms.
 Windows Phone 8, while adding a number of software
improvements, also brought support for updated hardware.
This included support for multi-core processors and high
resolution screens. Windows Phone 7 and 7.5 were often
criticized for a lack of high end hardware support, but
Windows Phone 8's new hardware gave Windows Phone the
ability to better compete with Google and Apple smartphones

5.  User interface
 Text input
 Messaging
 Web browser
 Contacts
 Email

6.  Games
 Search
 Office suite
 Multitasking
 Sync
 Store

7.  Windows Phone SDK 7.1.1
 Visual Studio 2010 onwards
 .NET , C#, Visual Basic,
XAML, XNA, Silverlight.
 Support for Windows 8.

8.  http://create.msdn.com Also called as
“ AppHub ”
 Registration fee:
For Developers $99.
For Student FREE.
 Try before you buy feature in Windows Phone Market.

9.  The main problem of Windows Phone is the lack of
applications
 Microsoft's developer initiative programmes and
marketing have gained attention from application
developers.
 As of Q3 2013, an average of 21% of mobile
developers use the Windows Phone platform, with
another 35% states they are interested in adopting it.

10.  Windows Phone is a best user
interface mobile operating system.
 Don’t just flow with the
waves but get what you
want from a phone.
As Microsoft said: “Windows Phone – Put people first.”