Is the SMS verification code sent manually?

This verification code was not sent manually.

In daily life, we often receive notification messages, such as delivery notification messages after purchasing orders, order notification messages after purchasing air tickets, and operator notification messages when the balance of mobile phones is insufficient. These notification messages are not sent to us manually, but are automatically sent to us by websites, apps or software systems, which greatly improves our product experience.

Whether it's a website, an app or a software system, if you want to realize the automatic sending function of short messages, you can only call the short message interface. The specific time to send SMS to the user's mobile phone is designed in advance by the background program of the website, app or software system. At present, there are two ways to choose SMS interface, one is to access the SMS interface provided by the third-party SMS service provider, and the other is to directly access the SMS interfaces of the three major operators.