To cope with the increasing demand for IP addresses, most mobile network operators (MNOs) have deployed Carrier Grade–Network Address Translation (CG-NAT). Introducing IPv6 in the mobile network reduces the CG-NAT bandwidth required by the mobile operator resulting in reduced CAPEX. This approach is supported by the increasing availability of websites and applications over IPv6 and the increasing support of IPv6 on SIM-based devices. An important benchmark to evaluate IPv6 transition technologies is the impact on the user experience, which should be minimized. The chosen transition technology should also result in minimal OPEX and CAPEX for the mobile operator. This whitepaper describes IPv4/IPv6 protocol translation (464XLAT)—an IPv6 transition technology—and compares it to other options available to mobile operators for the introduction of IPv6 in mobile networks.