Just Root the HTC EVO so you get SuperUser Permission and after that Download Wireless Tether Apps which is free!!

How to Root HTC EVO  www.thedroiddemos.com/2010/09/20/how-to-root-the-htc-evo-4g-with-unrevoked-3-21-video-walkthrough/

this is the easiest way to Root it, (oh don't update after you Root it using regular Spritn Update way)

Hope this helps!!

Else Just GOOGLE, tons of info at Android Forum!!

1. Type config: in the address bar and then press enter
2. Set Use bitmap fonts for complex scripts to Yes and thenSave

(This is as Simple as I can get, let me know if you still can't get it !!will put up picture if needed)