I'm pretty sure if I accidentally press "OK", I get charged extra. In addition to the pop-up, I get the same thing as a permanent notification until I reboot – if I try to disable the notification, I get "These notifications can't be modified", as it is using the built-in system SIM Toolkit. I am using GrapheneOS. Name and shame: MOVISTAR.

Pop-up: "Ultimo dia! Obten in modulo de 30 GB x30 dias por solo $30 en tu proxima factura. Activado dando clic Aceptar
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[–] 37 points 2 months ago* (last edited 2 months ago) (3 children)

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.

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