Whenever you try to log into your Yahoo Mail account, if your email account is enabled with the two-step verification, you must have the Yahoo verification code sent to phone. However, if you didn’t receive it, follow the below-mentioned steps to resolve the issue:

1. Check if the device you are using is connected to the internet.
2. Check if your phone’s SMS storage space is exhausted.
3. Try deleting any unwanted messages from your phone and check if you have received the verification code from Yahoo.
4. If it takes longer than usual, click on the “Send me the code again” option and check if you receive the Yahoo verification code.