On paper the HTC EVO 4G is beyond capable of utilizing Wireless N as its Wi-Fi chip supports the protocol, but for whatever reason HTC has the functionality disabled on the handset. Sounds like the perfect situation for the guys at XDA-Developers to step in and come up with a software exploit that gets Wireless N up and running. Sure enough, that is exactly what has happened.
Now this isn’t necessarily an undertaking for those not inclined to tinkering around with their phone’s software, but if you are the type who likes to mod and root your Android phone you won’t have much trouble getting Wireless N working. You can head over to XDA for the step by step and to gather the necessary files. Let us know how it goes if you try it, we have seen some reports that overall Wi-Fi performance improves after enabling Wireless N.