My carrier (Vodafone) is showing me pop-up messages, any way to stop them?

So it's pushed messages from Vodafone. If there's no way to stop or unsubscribe from the SIM Toolkit options. You'll probably need to contact Vodafone customer service about it m

 

Perhaps I'm simply too skeptical, but the wording/grammar/writing style just scream spam/scam.

 

I am travelling through many countries and I meet often this things, I don't know how they subscribe me to this but I getting very angry on such stuff. Once I called to an operator and asked him to stop this things and he said that he is not responsible for this things, that was a punch. Then I found a few guys that are experts in unlock ee phone and they fixed everything in less than a minute. To be honest I had no idea how they did this, but now there are no more popups like this, I am very thankful.

 

This is how I stopped it, I hope it helps you as well:
Steps:
1. Go to Settings
2. Go to Installed apps
3. Search for Sim Tool Kit
4. Select Sim Tool Kit
5. Select Notifications under the permissions tab
6. Uncheck all the notifications type i.e. uncheck priority, sound, vibration, notification light etc. you will not be able to uncheck show notification but thats fine.
Done.!
This annoying flash messages is one of the reason why subscribers shifted from idea to jio. If idea does not understand, it may lose customers.