Electronic devices made from the semiconductor gallium nitride stand to revolutionize wireless communications. They can operate at higher speeds and temperatures than devices made from silicon, so they can be used to control the higher frequency radio waves needed for faster and higher bandwidth data transfer. In addition, their ability to withstand much lower temperatures makes them promising for use in quantum computing. To realize the material’s full potential, though, accurate modeling and simulation tools are needed to guide scientists and engineers designing new devices.