People do not remember phone numbers any more. I want to manage three pre-paid phones, and it would be nice if I had a little text field to say ''Betty's phone" "Mark's phone" etc... so that when I log in for topping up, I know which phone it is.
Peter, prepaid accounts only allow single lines anyway, so if you manage 3 prepaid phones, it means you have 3 pre-paid self-serve accounts set up, and they each need a different e-mail address. You can't really have a mix up since they're handled separately. Or am I missing something?