Some free games require that you add a phone number to your Battle.net account

What to do if you don't receive texts from Blizzard

How to resolve the error "The phone number is invalid" or "Please enter a post-paid number" when adding a phone number to your Battle.net account

Information on Phone Number Not Eligible for Callback error

How to contact the Blizzard legal department.

What to do if you receive this error when adding your phone number to your Battle.net account

How to remove or change the phone number on your Battle.net account

A phone number can only be linked to one free game

What to do if you corrected your country of residence in your account details but still you can't add your phone number to your account

Information on Battle.net Phone Notifications