You’re a busy developer and you have read article after article of “What’s new in WP7 Mango” but you are only interested in knowing “What does this mean for me as a developer ?”. This is where I step in and give you the “need to know” with a quick blog post. What is it? The Beta to Windows Phone 7.1 Developer Tools named ("Mango") was released on May 24th, 2011. This means you can download the bits right now, but as far as having Mango on your phone you are going to have to wait. Let’s hit the bullet points first: Mango Beta Dev Tools requires VS2010 SP1 already installed. Applications created using it will not run on a NoDo Device. It can run side-by-side of the final WP7 release earlier this year. (So you won’t screw up your dev machine) It is a beta and you can’t submit an app using it. Visual Basic is now fully integrated into the release, but you need to uninstall VB for WP Dev Tools 7.0 First.