windows phone logo redThere has been much speculation of a September release of the Windows Phone 7 Mango update, and today WPCentral received a note from a developer stating that they had been advised by Microsoft and a manufacturer to downgrade Mango devices to an earlier test version in readiness for a ‘smooth Mango deployment’.

Hello today we got an email notification from both MS and our Vendor for whom we test it’s unreleased (TBR) device (not Sammy or HTC) to DOWNGRADE our Mango units to previous TEST Windows Phone Version as to check MS Servers for smooth Mango deployment/update and if all the Servers are prepped…

Looks like the Mango build rollout to handsets could be happening any day now.