Sim Card Slot on 2-19 Tensorbook?

Hello all, I’m curious about my Tensorbook (2019 2080 model). I’ve had it for a few weeks and just noticed a slot underneath the SD/MMC card slot. It says SIM so I assume it’s for use with a sim card but I can’t find anything in the spec list on the website for this. If anyone has any thoughts or opinions please let me know as I’d like to find out sooner than later.