I don't understand the problem, isn't this "solved" by contact lists? I for one am glad I can just call "Ted" instead of having to remember some nonsense like dreamyted887.com

I agree phone numbers are stupid to use as authentication, but I don't see how this scheme can save anyone from having to purchase a new sim when they move between autonomous cell regions.

Also, why is the Patrick McGoohan quote attributed to Iron Maiden?