I'm amazed people use premium rate numbers
No, it's not because I live in a big city with somewhat ubiquitous 3G coverage. Rather that why can't those who do just call a friend who has internet access or just plan in advance?
It's not like phone calls are expensive.
I know, certain segments of the population don't have internet access, and certain areas don't have a good bit of (mobile) phone coverage, but that's why they invented a good old phone book. been working quite well for a few decades.
I am guessing that this is based on fixed line rentals for much of the above.