Originally Posted by
adidas
So in order to use the Authenticator on the phone, you first need to deactivate the old keychain auth (if that was the prior one) and then reactivate the phone auth app through your BAttle.net account.
As for the armory app on the phone, it should allow you to connect right on up to guild chat no problems, make sure you've entered in all the info needed : Email address used for login, password, and the realm you play on. You should not need to use an auth code for just logging on to the armory app via your phone. Now my experience if you wanna do anything with the AH on the app, that you HAVE to auth and login for that again, while already in the app, and the app should prompt you too.