Why is qq Security Center bound to send SMS?

Sending text messages is to send money to operators, and software vendors have to do it. If they don't send it, they can't use the mobile phone operator's network platform.

Sending text messages should also consider that someone illegally steals other people's information, or the operator enters the wrong mobile phone number, which leads to the binding of non-personal numbers. If someone complains, qq will be theirs.