PSA: authenticator may not be friendly with iOS 7 update members with a mobile authenticator on an iPhone, iPad or iPod, listen up: Today's iOS 7 update may reset your authentication info. Blizzard has a few suggestions to make sure you're still protected after the update hits:
  • Write down your authenticator's serial number and restore code, and restore it to your phone after the update
  • Remove the authenticator before updating and reattach it after iOS 7 is installed
  • Use Blizzard's SMS Protect, a free service that can remove an authenticator from your account
  • Update via wi-fi, since this reduces the risk of an accidental reset altogether
Read through the mobile authenticator troubleshooting page for specific questions, and enjoy that fancy new version of iOS.

This article was originally published on Joystiq.