If you're using PayPal, they support proprietary one time key and SMS, a guy came up with a method to use any 2FA app with paypal: https://medium.com/@dubistkom

If you're using PayPal, they support proprietary one time key and SMS, a guy came up with a method to use any 2FA app with paypal: https://medium.com/@dubistkomisch/set-up-2fa-two-factor-authentication-for-paypal-with-google-authenticator-or-other-totp-client-60fee63bfa4f https://medium.com/@dubistkomisch/set-up-2fa-two-factor-auth... Just tried it myself, it works.