There are short messages starting with 162 every day.

If you receive unknown messages and text messages, don't open them. If you open them, viruses will invade and steal your personal information, and you will also steal your personal information by opening links. There is also an unknown call from other places. If you don't have friends or relatives in the area, don't answer, even if you refuse to answer. It's not safe. The best way is to let him hang himself.