The testimonials come from Wilson's own customers. The St. George, Utah, company hired Action First, a firm in Washington, D.C., that conducts lobbying based on public input, to create the site. Among other things, customers used loaned video cameras to record their own experiences, said Wilson spokesman Jonathan Bacon. In addition to the few dozen people who provided testimonials for the website's map, about 1,000 other advocates of signal boosters provided testimonials, videos or comments, some of whom represent larger organizations, said Matt Waldrip, a partner at Action First.

, an operations manager at Yellowstone Park Service Stations in Gardiner, Montana.

"I would like to take this moment to express my concern over the potential restriction or elimination of after-market signal cell phone boosters," Guengerich wrote. "This would be an extreme detriment to public and employee safety if this happens. Yellowstone National Park receives approximately 3.5 million visitors per year and this technology saves lives and provides an invaluable communication tool in remote areas."

Wilson works closely with carriers in Canada, but U.S. operators so far haven't been willing to endorse or sell signal boosters, according to Banos. He believes they are only hurting themselves, because boosters improve the subscriber experience.