I didn't send SMS and MMS, but I received SMS and MMS from 8-36 yuan every month. I called, but the customer service reply terminal was not there.

I don't know, but since they say so, you can find a friend to insert your card with a genuine mobile phone for a month, and then you can have something to say. If there is no such situation, it is a mobile phone problem. The best way is to go to the business hall and know all the functions of your mobile phone. Do both, and you'll know what the problem is. It is also possible that the mobile phone downloaded some apps and got a virus or something. Anyway, the exclusion method, they said where the problem was, and they ruled it out for this problem. Finally, the problem of moving can be settled with them.