Why check the phone records by SMS?

2. The validity period of the short message random code is five minutes, and the validity period of the one-time short message random code authentication is half an hour, that is, after the one-time short message random code authentication is passed, there is no need to re-authenticate the "call list" and "short message and MMS list" within half an hour.

Tips: Commercial policies in different cities are different, and the specific situation is subject to local policies.