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How to remove or change the phone number on your Blizzard account
Blizzard or game account hacked or compromised.
Requests to change the country / region of residence on a Blizzard account.
How to change the language settings in your Blizzard games
How to change or update a Blizzard account email address.
How to move a game account to a different Blizzard account
How to update your BattleTag.
How to permanently delete an account.
It is not possible to merge the progress of two or more games into one.