Plenty of speculation on the release date of Mango has been cleared up today via Microsoft’s official Windows Phone Blog. Moving from the vague fall release date to “rolling out in the next week or two” is the current update. As with previous releases, Microsoft has set up a table for users on Where’s My Update to check timing on their carrier update. Please note this has yet to be updated for the Mango release.
For those of you considering Windows Phone Mango through unofficial means, Microsoft clearly advises against such means.
During the official Windows Phone 7.5 update process, every Windows Phone will also receive software from the handset manufacturer. This matched and paired firmware has been painstakingly tuned so your phone—and apps—work with all the new features of Windows Phone 7.5. Since your phone requires the proper firmware to function as designed, my advice is simple: steer clear of bootleg updates and homebrew tools.
Chances are that if you’ve considered moving to Mango through unofficial paths, you’ve already made the move. Those who have not, the wait is almost over.
Source: Windows Phone Blog