Another company that sends 2FA over SMS codes, then wants them over the phone is Family Mobile. Its a Walmart T-Mobile derivative.

Its not a GREAT carrier, but I have a legacy plan for unlimited everything at $20 a line.

But if I have to call in, they do send a 2fa SMS code, and require to tell them over the call. Its absolutely ridiculous. But, Ive only had to call in 4 times in the last 9 years, so, yeah.