The wideband "hd audio" codec was developed by telecom people in the 70s. The problem with mobile is that the vocoder is trying to cope with a channel having 9

The wideband "hd audio" codec was developed by telecom people in the 70s. The problem with mobile is that the vocoder is trying to cope with a channel having 99% packet loss and latency variance 10x over the mean. The width of the passband is the least of voice's problems. The solution to mobile voice's problem is for the carriers to invest in a network that isn't ludicrously oversold.