There's been some push from the other side: cell phones move too much in physical space to make IPv4 routing efficient (especially with today's scarcity) so tod

There's been some push from the other side: cell phones move too much in physical space to make IPv4 routing efficient (especially with today's scarcity) so today most cellular networks are IPv6 "native" and rely on IPv4-over-IPv6 router proxies for IPv4-only traffic. Smartphones have been among the biggest leading adopters of IPv6 out of necessity to the network topology.