The nato phonetic alphabet one cracked me up. My dude you don't need that, call center employees don't know it, just say S as in Sugar like ur grandma used to.
The NATO alphabet is made of commonly known words that are hard to misspell and hard to mishear (at least the initial phonemes). The person on the other end doesn't need to be able to recite the words, they just need to be able to hear "november" and recognize that it starts with N.