Download Final Windows Phone 7.5 Mango Build 7720
Apparently the flashing tools Microsoft has been using to update Windows Phone 7.5 beta to the RTM version has leaked onto the internet and there is a reasonably good chance that flashing the RTM, which is only slightly different from the 7712 build out already, will leave your device in a state not updatable by the official release, but when you made a NoDo back-up, it should be possible to get back to the straight and narrow. This is still considered a developer release, which simply means that it will work on any Windows Phone 7 device without modifications and Windows Phone Mango is the long wished-for major update for Windows Phone 7, aimed at building on the first-generation platform, which is expected to bring Microsoft’s smartphone division up to par with its main competitors, mainly Android and iOS……………..