I have changed my phone number, what should I do?

2FAS Auth app works based on codes (TOTP or HOTP tokens). We don’t use phone numbers, and for privacy reasons, we don’t even want to know your phone number. If your Two-Factor Authentication was based on our application, not on text messages, then access to the service won’t be lost. If the verification was based on SMS, then you should contact the service you want to log into and resolve the situation with their customer support.