Research In Motion joined the battle of the touch-screen titans, and the first smartphone based on the open-source Google Android operating system saw its debut with the HTC-built T-Mobile G1.

The Evo 4G is physically very similar to the HTC HD2, a Windows Mobile 6.5 phone that also packs a 4.3-inch capacitive touch screen and a 1 GHz Qualcomm Snapdragon processor inside. The HTC Evo 4G ...