A company named LightSquared has already received approval from the FCC to launch the 4G network, but a study by GPS stakeholders, including Garmin, could cause wiser heads to prevail in the long run. Each of the 40,000 transmitters has the capability to totally disable a Garmin 430 receiver at a range of as much as five miles. The study conducted by the stakeholders called the multibillion-dollar LightSquared network, "… a disastrous interference problem for GPS receiver operation to the point where GPS receivers will cease to operate when in the vicinity of these transmitters." Given the breadth of the coverage so many transmitters will generate, the plan could, "… deny GPS service over vast areas of the United States," according to the stakeholders' report. LightSquared claims that "properly filtered" GPS devices won't be affected, and the company is working with the GPS industry (under an FCC mandate) to identify devices that could be compromised.