Why is there no SMS verification when I charge the phone bill on qq?

If you set a verification code that requires SMS verification, you need to go to your mobile phone. However, the system will also record your transaction, that is, the second time you continue to charge the phone bill. Since this is the default mobile phone number, you don't need a verification code, but you only need a verification code when you are on the same device:: _<* This also saves you time. Of course, if it is someone else, you will definitely need the verification code:: _< is still very safe, don't worry.