On Tuesday, Verizon announced that it will launch HD Voice over LTE in the coming weeks. With this launch, Verizon is taking the first step toward shedding CDMA2000 as its primary network platform.

Although wireless standards like 3G, 4G, and 5G are mostly associated with mobile internet, they also include a phone (voice) component. Up till 4G this was done using traditional circuit-switched ...