I am doing an impossible research. Currently I am trying to find out how all the different telecom self-service portals work. As it's almost impossible for me to be a customer for all mobile carrier (around the world), I am asking the community to help.
This thread can act as a resrouce gathering for pattern study in telecom self-service. (if we manage to gather enough screenshots) I think this would be benefitial to everyone as this is not just a portal, not just a website, but more of a service design on the web.