These popups are so called "emergency notifications". They are not supposed to be used for advertisement. Guess who abuses it...

This is super common in Brazil. TIM sends several SMS that cannot be blocked, per day.

It is possible to disable the SIM Toolkit app if you know how to use ADB, at least on some devices. There's a few guides around for it.

It's worth noting that disabling it doesn't really cause issues in most cases, since the actual chip functionality is handled by other programs.

Edit: Looks like the link I sent got redacted somehow, but either way searching for stuff like "adb disable sim toolkit" seems to give you answers.

That’s more than mildly infuriating!

Mierda

I was in Colombia for 4 weeks, had a local sim. Think i got a promotional message like this 2 or 3 times a week. It wasn't MOVISTAR but their competitor Claro. Luckily they were regular SMS and i could just silence the notifications.

Movistar is also O2 or Vivo depending where you're from

I wasn't in the market to switch carrier anyway, but I'm definitely not gonna pick O2 next time now if this is what they do in other markets

Damn. I get mad at the normal text messages sent by Tmobile; but I can at least block the number and label it as spam. This would make me go with a different carrier even if it wouldn't have the same coverage area.

And when you hit "cancel" or the home button, there's another popup asking you why.

Find a new provider? Maybe try my suggestion about denying notification permissions (may not work depending on how they did it).

What the fuck?

They are absolutely blockable - try disabling com.android.stk and com.android.stk2. Also try looking up if there's a way to opt out of via via the carrier because there likely is.

Ésto es en España? Si es así te recomiendo PTV Telecom y hablar con un abogado

Sever