To recover Yahoo mail by using Facebook, you will need to-
- Go to the trusted web browser
- Now, move ahead with the Yahoo Sign-in helper page
- This is the time to feed your Facebook ID in the Yahoo ID domain
- After that, tap on the Continue option to move ahead
- Follow the on-screen prompts to access the Yahoo Account
This is the way through which you can recover your Yahoo account. Make sure that you have a good connection and an updated Yahoo Mail App. At Yahoo Customer Care Help UK