IPv6 is already live in EE's VoWifi network, and implementation in the data network is underway. Testing began on a small test network with a few testers, and will expand to a trial with several hundred users and several months of validation. Key components like the RAN, core network, and billing systems are being updated for IPv6. Challenges include updating 90% of network components and working around devices like FEMTO boxes that don't support IPv6.