When Steve Jobs unveiled the iPhone at Macworld in 2007, Android was just a small phone software project Google had purchased, as far as the market was concerned. While many Android phones have been launched over the years, a few key models played an important role in helping the Android ecosystem grow to where it is today. The very first Android phone released to the public was the HTC Dream, though it included a slide-up keyboard and buttons to help control the device. It wasn't until the Motorola Droid was released in 2009 that Android really hit the mainstream. We looked through the archives to identify which Android phones really left a mark on the industry, and what role they each played.