Clearwire Communications has turned on WiMAX service in Harrisburg, Reading, Lancaster and York, Pa.

Clearwire parent Sprint is reselling the service, as well. The four central Pennsylvania cities are also within the footprint of Comcast, a Clearwire investor and reseller.

Clear WiMAX covers 271 square miles and more than 739,000 people in the area. The four cities are all within about 30 miles from each other. Lancaster is the farthest east, about 30 miles from Philadelphia, where Clear service already covers about 1,000 square miles and is available to about 3.6 million people.

Clearwire named Curtis Heffelfinger as general manager for this area.

"We are excited about this day for two reasons: We believe that Clear is truly going to revolutionize the way folks in central Pennsylvania access the Internet, and it’s personally gratifying to me given that Harrisburg is my hometown,” said Heffelfinger. “Customers can eat lunch on City Island while conducting a WebEx meeting, and baseball fans can stream radio while tailgating in the parking lot before a Revolution game in York. We’re providing an Internet experience that is unmatched, and we can’t wait for people in central Pennsylvania to enjoy it.”

Clear is offering a $25 service credit promotion that covers the first two months of service. Sprint, meanwhile, said new customers can try the service for 30 days, and if not satisfied, will be able to cancel and get their money back.