Why do I receive spam from the operator in standby mode?

Question

Beeline

Recently, when the phone is in standby mode, messages from the beeline come like "subscribe to this service, it costs so much." The interface that appears at the same time strongly resembles the SIM card menu (message loading progress bar, OK / Back buttons). After a quick look at the connected services at the office. The website didn't find anything wrong. No clear pattern was found in the time of appearance of messages.
What is it and how to deal with it?
PS Messages came to Sony Ericsson J120i, Samsung C3350. Relatively old phones, not android.

Answer 1

Beeline calls it a chameleon. How to turn off the chameleon yourself google?

Answer 2

Disable content subscription in your account.
That is, in general.