All cell phones have a SIM card.
Encrypted in it is the code that identifies the device to the network.
That’s why only your phone rings when someone dials your number even though the signal is coming over the air on radio waves and theoretically can be “answered” by anyone.
Not sure if that is true.
My phone is an LG UN 170, and i'm not finding any information about it having a SIM card.
This link says a bunch of basic LG phones don't support SIM cards.
https://www.verizonwireless.com/support/knowledge-base-52469/
If you can find information which says my UN 170 has a SIM card, i'll concede the point.