As of December 2015, some companies that offer unlimited mobile broadband are Sprint and T-Mobile. Sprint offers an unlimited data plan for $70 per month. This data plan entitles customers to 23 gigabytes of high-speed data transfer per month, after which Sprint throttles the connection speed.
T-Mobile offers customers five options of unlimited data plan including 2GB, 6GB, 10GB, 14GB and 18GB. Customers can transfer data at high speed until they reach the speed threshold of their data plans. Once reaching their speed thresholds, customers still have unlimited access to data but at a reduced speed until the end of their billing cycles, at which time the service provider resets the speed thresholds.