Why won't the verification code of telecom be hijacked?

The verification code authentication data of telecom is only transmitted between the mobile phone card and the mobile phone, so there is no risk that the SMS verification code will be hijacked in the middle. Carrier-level security protection to prevent the risk of secondary numbers. Compared with the traditional registration method of mobile phone number plus verification code, the authentication data is only transmitted between the mobile phone card and the mobile phone, so there is no risk that the SMS verification code will be hijacked in the middle, and users do not have to worry about receiving the fake verification code from the pseudo base station.