Windows Phone 7.8 is the version for Windows Phone 7 that was released on March 13, 2013. From Microsoft, Windows Phone 7.8 was leaked update on March 15, 2013. In the stages, Microsoft launched three device support for Windows Phone 7 is Samsung, Dell, and HTC, reach supported was ended on September 9, 2014. Features since August 29, 2014. But it's 256MB of RAM in devices, have a choice in Microsoft, support mainstream has ended on September 8, 2013.