How a friend can contact Customer Support when she/he can't log in.
Customer Support is unable to offer discounts
Information about two-factor authentication requested for digital purchases.
Some games require that you add a phone number to your Battle.net account
What to do if you don't receive texts from Blizzard
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
Blizzard Customer Support cannot lock your account on request
What to do if the website returns "Connection Error" when adding a phone number
Troubleshooting PayPal payment issues