Need to update the phone number on your Battle.net Account?

What to do when you receive the error "The phone number is invalid" when adding a phone number to your Battle.net account

Information about why you might get the message "An error has occurred." when you try to add a payment method

Troubleshooting steps for communication and transmission errors.

How to report a bug in StarCraft II

How to resolve this error when trying to log in to Battle.net

Information about this error when adding a phone number or a Battle.net Authenticator to a Battle.net account.

What to do if the website returns "Connection Error" when adding a phone number

Reporting an Exploit or Hack

How to create an account to play on the Public Test Realms