How to prevent phone operator from opening spam popups? My phone operator, Movistar Argentina, is sending a lot of spam. I managed to block most of the SMS, however it has now also started opening ad popups on my phone (see below). 



I've looked at How do I block this (carrier) advertisement dialog? but I cannot find the "SIM Toolkit" app anywhere on my phone to disable it. Is there any other way to block this?
This generally seems to be done as a 'value added service' in the Andriod SIM Toolkit, as per  this question here. 

However, in this case it may be a Cell Broadcast. 


  Cell Broadcast is designed for simultaneous delivery to multiple users in a specified area. Whereas the Short Message Service-Point to Point (SMS-PP) is a one-to-one and one-to-a-few service (requires multiple SMS messages, as each message can only carry one phone number), Cell Broadcast is a one-to-many geographically focused messaging service. Cell Broadcast messaging is also supported by UMTS.


If you go to your SMS app and go SMS > Settings > Cell Broadcast and disable it, this should stop this popup.