DBnull

Windows phone was launched in November 2010 brought metro UI ( inspired by Zune HD ) to smartphones. the home screen consists of the "live tiles" which update himself and display information. WP OS was launched with version 7 which was in continuance with the old windows mobile OS. which was updated with v7.5 (also known as mango) in may 2011. In the year 2012 another update (tango) was released to lower hardware requirements of the OS so that the OS can run on phones with less powerful hardware. later on October 2012, Microsoft released WP8 it replaced the previous windows CE-based architecture with one based on windows NT . the WP8 added many software improvements and support for better hardware like multi core processors & high resolution screens. with the launch of WP8,Microsoft announced that the WP7 phones would not get updated to WP8 which was very disappointing for WP7 users. later Microsoft released a small update for WP7 phones which were updated to v7....