Okay, yeah that makes sense. I'm very new to SIM programming, hence all the basic and wrong questions.
What exactly is your technical requirement? Please tell us more about what you want to do.
I just have a basic hello world applet that I'm building off of and the concept I'm working with requires it to launch without explicit user intervention. My lazy approach was to attempt making the applet the default; which, I now know is not the right path for USIM cards.
The ETSI TS 102 241 - V16.0.0 documentation, section 6 (which should be the right release version for me) describes the correct way to trigger my applet. Rather than using the toolkit event menu selection. I should be registering a different event like unrecognized_envelope, timer_expiration, or download_local_connection.
I've mostly been learning from example applets, so I didn't realize there were other events you could use.
Thank you!