What to do if you are unable to use the Hyperdrive customization for the Delver's Mana-Skimmer after using the schematic.

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

Information about two-factor authentication requested for digital purchases.

Information on the sms requirement for Call of Duty

Choosing to side with Sylvanas or with Saurfang is irreversible

Information on contacting Activision Support

What to do if you're unable to complete this quest

Information about this error when login to Diablo II

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