How does qq cancel sending short messages to retrieve passwords through secret mobile phones?

There is no way to cancel the secret protection of the mobile phone. You can choose not to retrieve the password through SMS verification of the secret protection of the mobile phone, but you can use the secret protection question to retrieve the password (provided that other secret protection is set, otherwise you can only retrieve the password or appeal through the verification of the secret protection of the mobile phone).

if other secret protection (secret protection problem, etc.) is set, in QQ Security Center-Password Management-Verify Secret Protection Recovered Password, select "Password Problem" in the password recovery box for verification, and SMS verification of secret protection mobile phone is not required, as shown below.

In August p>215, when you start to apply for a new QQ or reset your password security after your appeal is successful, you must set up a secure mobile phone. The secure mobile phone cannot be cancelled, so you can always get your password back through the secure mobile phone.