Unicom sends a text message to remind you at night.

If the mobile phone has traffic monitoring software, most of them are SMS codes that the software automatically sends to the service desk 100 10 to calibrate the traffic, so it can be turned off directly.

It may also be caused by some illegal software installed in the mobile phone.

It is also possible that there is something wrong with Unicom's system. You need to call Unicom's customer service number 100 10, and then select the manual service and follow the manual service prompts.