...and doesn't hang up. This classic joke soars high as a meme (pun intended).

When is it better to use "let freedom ring" or "let freedom reign"?

Always. When freedom exists, then nothing “reigns.” Freedom is the absence of anything “reigning.” So it’s never better to use “let freedom reign.”

ISN'T IT BETTER TO LET PEOPLE SPEAK HOW THEY WISH??

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Yes, all should be allowed to speak how they wish.
(Plus, "ring" works with the pun. LOL)

lol. i got that (at first.) then i recalled 'reigns'.