Authenticator loop with Authenticator integrated

Curious if anybody else ran into this issue.

Wife trying to login to World of Warcraft, asks for Authenticator, go to Phone try to load Battle.net App for Authenticator and it wants Authenticator Code.

With Authenticator integrated into Battle.Net how can I authenticate to get the Authenticator code for Battle.Net to get Authenticator code for World of Warcraft. – Bit of a loop there

Unfortunately she did not update her phone # and has an old one there so cannot SMS a code. And trying to recover from Authenticator recovery just gives a Battle.net Error.

Figuring she may have to call support.