Most people outside the field don't know much about all the internals of phones, SIMs, etc., unfortunately...

Reminds me two articles about SIM cards autonomously sending SMS messages (found here on HN long time ago, probably)

https://medium.com/telecom-expert/what-is-at-t-doing-at-1111... https://medium.com/telecom-expert/more-proactive-sims-f8da2e...