A running list of cities that have Sprint's 4G WiMax service (which the Evo 4G can use in addition to 3G EV-DO).
Current cities
Abilene, Texas
Amarillo, Texas
Atlanta, Georgia
Austin, Texas
Baltimore, Maryland
Bellingham, Washington
Boise, Idaho
Charlotte, North Carolina
Chicago, Illinois
Corpus Christi, Texas
Dallas/Fort Worth, Texas
Greensboro, North Carolina
Harrisburg, Pennsylvania
Honolulu, Hawaii
Houston, Texas
Killeen/Temple, Texas
Kitsap, Washington
Lancaster, Pennsylvania
Las Vegas, Nevada
Lubbock, Texas
Maui, Hawaii
Midland/Odessa, Texas
Milledgeville, Georgia
Philadelphia, Pennsylvania
Portland, Oregon
Raleigh, North Carolina
Reading, Pennsylvania
Salem, Oregon
San Antonio, Texas
Seattle, Washington
Snohomish, Washington
Tacoma, Washington
Waco, Texas
Wichita Falls, Texas
York, Pennsylvania
Scheduled to get WiMax
Boston, Massachusetts
Cincinnati, Ohio
Cleveland, Ohio
Daytona, Florida
Denver, Colorado
Eugene, Oregon
Grand Rapids, Michigan
Jacksonville, Florida
Kansas City, Kansas
Kansas City, Missouri
Los Angeles, California
Miami, Florida
Merced, California
Minneapolis, Minnesota
Modesto, California
Nashville, Tennessee
New York, New York
Orlando, Florida
Pittsburgh, Pennsylvania
St. Louis, Missouri
Salt Lake City, Utah
San Francisco, California
Stockton, California
Tampa, Florida
Visalia, California
Washington, D.C.
Wilmington, Delaware
Yakima/Tri-Cities, Washington