If mobile internet carriers get a specific IPv6 address slice and do what they already do with phone numbers, you could have a mobile non-changing IPv6 routed r

If mobile internet carriers get a specific IPv6 address slice and do what they already do with phone numbers, you could have a mobile non-changing IPv6 routed roughly efficiently, that globally. Actually, this should be a base service of mobile internet. The various carrier peerings will define how "efficiently" your traffic is routed (realtime audio/video...). The blocker is the billing scheme I guess (as usual...).