Some free games require that you add a phone number to your Battle.net account
How to resolve this error when adding a phone number to your Battle.net account
What to do if you don't receive texts from Blizzard
Information on Phone Number Not Eligible for Callback error
Need to update the phone number on your Battle.net account?
How to contact the Blizzard legal department.
Use this page if you wish to change or modify your Contact and Shipping address for your Battle.net Account.
What to do if you receive this error when adding your phone number to your Battle.net account
Information on Blizzard Phone Notifications
How to remove or change the phone number on your Battle.net account