The nation's largest prepaid mobile provider, TracFone Wireless, will pay $40 million to settle government claims that it misled millions of smartphone customers with promises of unlimited data service.
TracFone's prepaid wireless service is sold under various brands, including Straight Talk, Net10, Simple Mobile and Telcel America.
Throttling slows down the ability to open Web pages or stream video. According to the FTC, TracFone generally throttled the data flow when a customer used about 1 gigabyte to 3 gigabytes. Data service was sometimes suspended at 4 gigabytes to 5 gigabytes, the FTC said.
"The issue here is simple: Unlimited means unlimited," said Jessica Rich, director of the FTC's consumer protection bureau. "This case is about false advertising."
In a statement, TracFone said it worked with the FTC to "reach an amicable settlement, and we have no further comment at this time."
The prepaid monthly plans were sold at Wal-Mart, Best Buy, Target and other retailers across the country as well as online.
Consumers who had a Straight Talk, Net10, Simple Mobile or Telcel America unlimited plan before this month can file a claim for a refund.
The FTC charges that TracFone has been throttling consumers or cutting unlimited service since 2009. The commission's complaint says there was no technical reason for TracFone to limit the data plans, such as slowing speeds because of network congestion. Internal documents, the FTC says, suggest the throttling was done to "reduce the high costs associated" with providing unlimited data.
In September 2013, TracFone began making some disclosures about throttling unlimited plans, but they were usually not clear or the print was too small for a consumer to notice them, the FTC said.