Why do you need a mobile phone to verify the initial number when playing with the red finger abroad?

New users must be authenticated. Call of the Devil is a 3D turn-based card RPG mobile game developed by Korean game developer Com2uS. The Apple Store was launched on 2014 June 12. 2015 65438+1October 22nd, the Android version of Call of the Devil was launched on 360 mobile assistants. Do you need a mobile phone to verify the initial number when playing Red Finger abroad because you need to receive SMS verification when registering a new account for the first time? You don't need it after registration. Just log in directly with a password account.