How / where to disable pop-up messages on an iOS phone from a Tele2 carrier?

Question

Tele2

Tele2 was tired of sending spam to the phone.
The subject text is displayed in a native window:
iOS (full screen in lock mode, white text on a dark background and two buttons below Accept and Cancel);
Android (in the center of the screen, a modal dialog with a couple of buttons);
This is not a standard sms/mms, no number, can't save.
There is an assumption that if you erase or block somehow SIM Applications from the SIM card, then the spam will end.

Answer 1

This is an advertising mailing. You just need to call the operator, here on the promobile all the available ways are described how to get to the operator and ask him to put a ban on this kind of mailings. It's lucky for you that they don't take money for it.