The past year in mobile has been even more eventful than most of us would have predicted. Our appetite for mobile data grew dramatically; Google’s Android continued its march to worldwide dominance; Amazon joined the tablet bandwagon; and AT&T tried and failed to acquire T-Mobile USA, among many other things. All of that activity lays the groundwork for a very promising — and very challenging — 2012. This research note serves both as a review of the major trends and events of 2011 as well as a forecast for the coming year. Companies mentioned in this report include Millennial Media, Quattro Wireless and Samsung. For a full list of companies, and to read the full research note, sign up for a free trial.