I'm not sure if the GGSN even configures itself global address from theprefixes it gives to subscribers (does router have to configure anaddress for itself from the prefixes it sends out in RAs?). I was unableto verify this right now.
No, that requirement went the way of the dodos in IPv6.Does this system give the subscriber more than just one /64? If not, the phone needs to be a bridge and the service provider will see more individual addresses.