We all know that Windows Phone Tango release has few new features for us. Jaxbot from Windows Phone Hacker got access to build 8731 using which he has made a video showing us the new features in Windows Phone Tango such as new location icon in the status bar, MMS changes, etc,. Also he has released a unlocked version of the build which you can download and flash to your phone. Check the source link below for more details.
Source: Windows Phone Hacker