What to do when the physical Authenticator battery has died and a replacement is desired?

The login servers received invalid information

Can't log into Battle.net website or get online when logging with the Battle.net desktop app.

Information on the sms requirement for Call of Duty

More information about authenticator security codes

What to do when a physical authenticator gets out of sync

Troubleshooting steps for what to do if completing weekly or daily quest requirements is not providing credit toward that quest.

Information on the Battle.net Authenticator

How to attach an Authenticator to your Battle.net account

Information on payment methods for our various shops.