How to set a recovery phone number without the screen blanking out?

For your password, are you using letters and numbers or just numbers? Try just using numbers.

When you're trying to recover your password, you input your password and then press skip.

Press the back button.

You want to enable whitelist, is that correct?

Can you set one now? Now that you're successfully inside the whitelist?

You will get locked out of white listing settings if you forget your password and you have no recovery number set. You can always set a new recovery number inside white listing settings.