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How does a telecom mobile phone card send a text message to inquire what services it has ordered?

Telecom's SMS business hall can handle inquiries and related business.

Because the operation codes of SMS business halls are different in different places, users can directly edit the messages from 1000 1 to 1000 1 to obtain the operation codes of SMS business halls, and then reply to the corresponding codes step by step to inquire and handle business as needed. Then remember the commonly used codes, and you can send them directly to me for inquiry next time.