Windows phone 7 code name Mango in said to be WP7 version 7.1. There’s about 500 new features but without saying more, here’s the list of most important new features: Internet Explorer 9 + Hardware Acceleration + Local Scout feature, to determined user's location Enhanced Bing experience Quick Cards Facebook Chat and Windows Live chat and integration in the social hub Hands Free messaging Better Live Tiles Multi-tasking We’re expected to see these in action in the fall.