Sprint, the country’s third largest wireless provider, announced the HTC Evo today, showcasing the world’s first 4G phone at the communication industry’s annual CTIA event in Las Vegas. This new phone is by all accounts a beautiful beast, decked out with a 4.3 inch screen, two cameras, and Android 2.1; but more importantly, it is the first phone to run on a 4G network.

However, this souped-up phone raises one extremely important question: what exactly does 4G mean?