Why does World of Warcraft bind SMS security? Don't verify every time you log in.

Have you logged in with Battle.net's client? If so, you will only verify the SMS security when logging in to Battle.net. After logging in once, Battle.net Recorder will automatically log in to your Battle.net. So you won't verify the security of SMS again. If you want to verify the security of SMS every time you log in to the game, it is recommended to use plug-ins to log in or directly use World of Warcraft Logger instead of Battle.net Logger.