Re: Why Just 4G???
2G and 3G use circuit switching for voice whilst 4G and 5G uses packet switching making them incompatible.
This is also a LTE-Broadcast (LTE-B) network not an LTE or LTE-A network like your phone uses. 3G has no broadcast capabilities and I doubt 2G does either.
2G (1991) and 3G (2001) were designed for another age and are no longer fit for purpose.
Biting the hand that feeds IT
