there's sneaky voice scams heading your way. watch out.

"3. Fake verification request
Your "buyer" says they're worried about being scammed and that they'll send a verification code for you to read back to them to prove you're legit. ...
4. Google Voice scam
This time, the code comes from Google. Once you give it to the scammer, they have both your phone number and the code, which enables them to set up a Google Voice account using your phone number.
https://scambusters.org/