Latest questions about "account verification"

I changed my cell phone number that was used for account verification on Yahoo. I neglected to change it in Yahoo, so therefore I cannot access my email while I'm away on vacation.

I use a Texting app on a regular basis. Can I use my Texting app number to verify my account? (textplus, text now, those kind of things)

How can I verify my Samsung account?

Why does Samsung keep sending me messages that I should verify my account? Whenever I try to go to the email, it's blank and when I try to resend it, it takes forever to verify or doesn't work at all.