This one was dragged out from wherever it was stored, knowing that it had a Disney-owned number on it.
This movie is set in the ’90s and a payphone was needed.
Nobody thought to check to make sure that was still the case, and here we are.
If I had to take a wild guess at how exactly a phone sex number wound up on a payphone in a still from a Disney film, I’d say that the payphone is a prop that Disney has had since the company owned the number.