How does China Mobile send SMS for real-name authentication?

To register with the real-name registration system, you need to bring your valid ID card, mobile phone SIM card and service password of 10086 (other materials are subject to the explanation of the business hall) to the local mobile business hall, or pay attention to the official account of WeChat (China Mobile 10086), and then click I want to apply-real-name authentication to upload ID photos according to the page requirements.