Welcome to SlashGear 101, a place where you're going to be able to learn everything you wanted to know about every little subject that matters most in the tech world. Today's subject is the brand-spanking-new Windows Phone version 7.1 Mango, a system that will be available for free to all eligible Windows Phone customers by the fall of 2011. This newest system improves the Windows Phone experience by Extending the App Experience, making "A Smarter Smartphone" with predictive features and multitasking, and adding Internet features that include Music Search, Visual Search (with photo recognizing abilities,) and Local Scout which shows you businesses and etc around the area you're physically located. Sounds great! Let's have a look!