When you are entering your phone number, you need to ensure that you are using the international format without any spaces or other characters.

EG +15551234.

Once you are done, you can go to Settings and activate Two-factor verification (2FA) which provides further security to your account.

If you would like to set up Two-factor Authentication (2FA) Authenticator App: Click/tap here.

If you would like to set up Two-factor Authentication (2FA) via SMS: Click/tap here.

If you would like to set up Two-factor Authentication (2FA) via Email: Click/tap here.