Need to update the phone number on your Battle.net account?
Use this page if you wish to change or modify your Contact and Shipping address for your Battle.net Account.
How to resolve this error when adding a phone number to your Battle.net account
Unable to place an order with error "Your credit card information is not valid"
Troubleshooting steps for communication and transmission errors.
Troubleshooting steps for payment error: Unexpected error code from complete:0.
Information about this error when adding a phone number or an Authenticator to a Battle.net account.
Troubleshooting steps for payment error: Oops! This needs your attention.
What to do if the website returns "Connection Error" when adding a phone number
A phone number can only be linked to one free game