How do I know if I have eSIM or SIM?
You can tell whether you have eSIM or SIM by following these steps to check the settings in your phone:
iPhone
Settings > General > About
If you scroll down, you'll see a small little header that says "Physical SIM" if you have a physical SIM card inserted. If you have an eSIM, it should instead say "eSIM".
Android
The easiest way to check if you have eSIM or SIM on Android is to check the SIM tray slot on the side of your device. It that will pop out with a removable SIM card, which you'll see upon opening the tray.
Settings > Network & Internet > SIMS
If your screen shows an option to add an eSIM, then you know it supports eSIM technology.