mango

If you're having trouble downloading apps from the Windows Phone Marketplace, you just might be a pre-Mango Windows Phone 7 user. Microsoft is now enforcing a rule that only users of Windows Phone 7.5, codenamed Mango, can use the Marketplace in any meaningful way. Without the Mango update you can still browse the Marketplace, but you will start getting error messages if you attempt to download, buy, update, or review an app.