Thats true, but I think there could be a way around that if we had a domain name service for telephone numbers whereby instead of having to remember a 12-10 dig

Thats true, but I think there could be a way around that if we had a domain name service for telephone numbers whereby instead of having to remember a 12-10 digit number with area codes for someone, we only need to remember a word or sentence and since a string (lower alphabet only) is base 26 it might be easier. Also could we not run out of phone numbers anyway like with ipv4?