HTC Evo

As previously announced, the highly anticipated 4G smartphone, HTC EVO 4G, is now available in the U.S. Customers can purchase the device at Sprint retail stores, RadioShack, Best Buy and Walmart, as well as through Sprint.com.

The device costs $199.99 with a two-year service agreement and after a $100 mail-in rebate (taxes excluded).

You can read our hands-on review of the HTC EVO 4G here; in short, it’s a very advanced smartphone with top-of-the-line hardware and capable of 4G data transfer speeds, which is about 10 times faster than current 3G speeds.

To highlight the HTC EVO 4G launch, Sprint today started a major social media campaign, called Sprint Firsts, which encourages users to perform various activities at 4G speeds and let their friends know about it. Participants are being awarded 4G badges, and users who manage to be the “first” will get featured on the EVO homepage.