#1 - Nov. 9, 2010, 8:11 p.m.
If you sign up for the Battle.net Dial-in Authenticator, you will be asked to make a toll-free phone call from a specific phone of your choosing to authorize unusual login attempts with the associated Battle.net account. Please note that you will only be asked to make this phone call when something about your login attempt appears out of the ordinary. For example, if you were to log in from a location from which you do not typically play, you may be asked to call in and provide your selected PIN and a unique, single-use security code before access to the account will be granted.
Sign-up and use of the Battle.net Dial-in Authenticator is completely free and is currently compatible with World of Warcraft and Battle.net Account Management logins. So, what are you waiting for? To learn more about this service and find out how you can take your account’s security to the next level, check out the Battle.net Dial-in Authenticator FAQ today.