For Now, Stick With the NATO Alphabet

Article at Atlas Obscura: It Might Be Time to Update the Old "Alfa-Bravo-Charlie" Spelling Alphabet

As the article also points out, increasingly this is not just a radio thing.  As microphone size and voice bandwidth on cell phones are increasingly squeezed, being able to use a phonetic alphabet to spell things out is increasingly important.  The author highlights this with stories of difficulties with his own unusual last name.

Strangely, the conclusion of the article comes back around to "perhaps not; in testing, the NATO alphabet works perfectly well."  From the article:

Turns out there was effectively no difference between the new, improved spelling alphabet and the old standard.  If certain letters were in certain places in the nonsense combination, the new version might be more effective; in other places the old version was.  No difference!  After all that!

At some point, good enough is good enough and further refinement is not worth the small theoretical gains.  For examples, note the enduring QWERTY keyboard and the ongoing mediocrity-yet-useability of mp3 audio.

So what to do?  When in doubt, just use the NATO standard (wikipedia link).  It's the most common variant out there today, the most likely to be recognized, and the overall the most effective.  Also, you won't sound like a goofball as you search to come up with newer clever phonetics on the fly.