It’s here – the brand new - Windows Phone SDK 7.1 Beta2.

This time it has ability for your to Flash your Developer Unlocked phone to Mango Beta!

How awesome is that? Mega-Ultra-Mango-Awesome!!

The Windows Phone SDK includes the following

• Windows Phone SDK 7.1 (Beta2)
• Windows Phone Emulator (Beta2)
• Windows Phone SDK 7.1 Assemblies (Beta2)
• Silverlight 4 SDK and DRT
• Windows Phone SDK 7.1 Extensions for XNA Game Studio 4.0
• Microsoft Expression Blend SDK Preview for Windows Phone 7.1
• WCF Data Services Client for Window Phone 7.1
• Microsoft Advertising SDK for Windows Phone 7

The direct download link is: http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=26648

Official Details and instructions: http://create.msdn.com/en-US/news/Mango_Beta

Official Blog Post: Windows Phone 7 Developer Blog - Developers Get Goody Basket Full of Mangos

"If you're registered for Windows Phone Marketplace, you'll receive an invitation from Microsoft Connect that will provide access to a firmware update for your retail Windows Phone device"

#ProTip’s:

-Uninstall any Mango 7.1 Windows Phone 7 Beta tools if you already had them installed.

-If you have Visual Studio 2010 RTM installed, you must install Service Pack 1 RTM before you install Windows Phone SDK 7.1 Beta 2. Please refer to the Service Pack 1 release notes for installation issues. Visual Studio 2010 SP1 RTM

-If you installed Visual Basic for Windows Phone Developer Tools 7.0, you must uninstall it before installing Windows Phone SDK 7.1 Beta 2. Uninstall the item Visual Basic for Windows Phone Developer Tools – RTW from the programs list on your computer. Visual Basic is now fully integrated into Windows Phone SDK 7.1 Beta 2; you do not need to install it separately.

Follow the instructions very-very closely. Updating your phone yourself is serious business and should not be done while not paying attention!