What to do if you can't claim a Battle.net Balance code because the currency of the code doesn't match your currency

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

Troubleshooting game or Battle.net services connection error BLZBNTAGT00000BB8

Information on error BLZBNTBNA00001454.

Enabling the Command Key + Click combination on Mac systems.

Information on error BLZBNTAGT00000841

Information and troubleshooting on error BLZBNTBNA000009C8

Cannot install or Patch Call of Duty: Black Ops 4

Cannot install or patch Call of Duty: Modern Warfare II

Cannot install or patch Call of Duty: Modern Warfare