What is Android?Android is the only mobile operating system created by Google. It virtually turns your mobile device into a pocket-sized personal computer. Android comes with a full web browser and Internet surfing capabilities, access to over 80,000 applications through the Android Market, including Gmail, Pandora and Facebook, plus the ability to play games, enjoy music and videos, send text messages, and make calls on your phone.
Android is open-source software, which means anyone can make the operating system better. That way, you benefit not only from the knowledge of Google developers but that of third-party developers too. You can also upgrade your existing Android phone to 2.2 and get the same benefits without spending an extra penny.
Instant Wi-Fi HotspotAndroid 2.2 lets you turn your device into a portable Wi-Fi hotspot and use it to provide Internet access to your laptops and gaming consoles, just like a wireless connection you might find in your home or at a cafe. Once connected, you’ll be able to access the Internet using the same network on which your device normally runs, anywhere you have wireless data coverage.
Source from: http://www.samsung.com/us/article/android-2-2-os-explained