Windows Phone

2010-2010
On February 15, 2010 the successor to Windows Mobile, Windows Phone 7 Series was announced at Mobile World Conference 2010 by Microsoft.

2010-2011
Due to criticism about the length of its name, on the 2nd April 2010Microsoft shortned the name to Windows Phone 7. The circle was changed to green though other colors were still used on occasion.

2011-
In February 2011 an updated logo was introduced with the Windows Phone 7.5 'Mango' update at MWC 2011. The Windows logo was changed to a square to match the 'Metro' UI used in Windows Phone. The '7' was dropped from the logo.