It goes like this: I was having 7.10.8773.x, from zune I started updates and got me through these updates 7.10.8779.8 => 7.10.8783.12 => and finally 7.10.8858.136 (this is 7.8) reference - http://www.windowsphone.com/en-us/how-to/wp7/basics/update-h...