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.
Which often just confuses things further.
Me: My name is "Farb" F-A-R-B. B as in Baker.
Them: Farb-Baker, got it.
"S-T-E-V-E @ gmail.com, S as in sun, T as in taste, ..." "Got it, fpeve."
I once had someone sound out a serial number over a spotty phone connection years ago and they said "N as in NAIL". You know what sounds a lot like NAIL? MAIL.
And that is why we don't just arbitrarily make up phonetic alphabets.
It worked with me and I guess it must have usually worked for him in most of his customer interactions.