The next version of Microsoft's mobile operating system Windows Phone 7, codenamed 'Mango', has been handed over to mobile makers.
Microsoftie Terry Myerson dropped the news on the Windows Phone Blog saying that the OS had reached 'an important milestone' as the team officially signed of on a release to manufacturing (RTM) build of the software.
"This marks the point in the development process where we hand code to our handset and mobile operator partners to optimize Mango for their specific phone and network configurations," writes Myerson. "Here on the Windows Phone team, we now turn to preparing for the update process. The Mango update for current Windows Phone handsets will be ready this fall, and of course will come pre-installed on new Windows Phones."
Mango, which was originally announced back in May, reportedly includes 'hundreds of new features' including a new conversations view in email, threads which bring text messages, instant messages and Facebook chats together and app multitasking.
The new build also includes the mobile version of Internet Explorer 9.
Despite seeding the code to OEMs, Microsoft is no closer to announcing a public release for the updated OS and is coming under fire for its heel-dragging attitude.