Add Yahoo as a preferred source to see more of our stories on Google. What's a verification code, and why are they so important? Six-digit verification codes are a form of two-factor authentication, a ...

Add Yahoo as a preferred source to see more of our stories on Google. Restart your phone to help fix Android verification text problems, since it can solve temporary issues. Double-check that the ...

, a process that helps keep your important online accounts secure. For example, you might get a text message or email with a six-digit code that you must enter when you log into your bank account.