What happens with the IDgo authentication service when an end user with an iPhone device gets a new iPhone?

The next time the end user is prompted to authenticate themselves, the IDgo authentication will work as before if the end user chose to create a passkey when they enrolled in IDgo, since passkeys are stored in the end user’s keychain as part of their Apple iCloud account.

If the end user chose to enroll in IDgo and register their device, the end user will be authenticated using a one-time passcode and prompted to create a new device credential before they are allowed to respond to an authentication request.