AND THEN PHONE NUMBERS ABSOLUTELY JUST ARE LIKE FUCK YOU YOU GET ONE AND EVERYONE ASKS FOR IT SO NO MATTER WHAT YOU"RE UNIQUELY IDENTIFIABLE BY IT FUCK YOU
There's also the fact that a person can change phone numbers (and sometimes someone in a position with no other choice than to do so).
Also, after a phone account is closed the provider can and will just reissue the number to a new different customer who now has a bunch of random accounts they don't know about.
