Pay as you go internet provider Karma has just shown off a new LTE Wi-Fi hotspot that it says uses Sprint’s network to provide internet coverage “anywhere in the United States.” The beermat-sized device, called the Karma Go, works like a gas tank in a car: users can add as much data access as they like at a cost $14 per gigabyte. There’s no contract required, and once added, the data never expires. The company’s first hotspot used WiMAX for its data coverage, but says that by the time it released the device in 2012, it said “WiMAX already wasn’t the future of mobile technology.” For the Karma Go, the firm has been collaborating with Sprint to make an LTE device that it promises will work in more places than the previous model.