If you’re carrying an EVO 4G and live in St. Louis, MO; Richmond, VA; or Salt Lake City, UT, it’s time to smile: that mandatory monthly $10 fee you pay for the 4G network just got a whole lot more worthwhile.

That adds 3 more cities to the slowly growing list of WiMax-enabled cities — a list which, by the way, we’ve got right behind the jump.

All of the cities with Sprint 4G, as of June 28th, 2010:

Georgia – Atlanta, Milledgeville
Hawaii – Honolulu, Maui
Idaho – Boise
Illinois – Chicago
Maryland – Baltimore
Missouri – Kansas City, St. Louis
Nevada – Las Vegas
North Carolina – Charlotte, Greensboro (along with High Point and Winston-Salem), Raleigh (along with Cary, Chapel Hill and Durham);
Oregon – Portland, Salem
Pennsylvania – Harrisburg, Lancaster, Philadelphia, Reading, York
Texas – Abilene, Amarillo, Austin, Corpus Christi, Dallas/Fort Worth, Houston, Killeen/Temple, Lubbock, Midland/Odessa, San Antonio, Waco, Wichita Falls
Utah – Salt Lake City
Virginia – Richmond
Washington – Bellingham, Seattle