unless your phone is in airplane mode, it is constantly pinging your location, regardless of whether it has a sim / esim

Phone still givs off IMEI to the local tower

Phones devices have unique ID. So if its connecting to a tower the tower sees this unique ID and all the towers csn record this. so your home, places you visit. Even with NO sim. Silent link is great in many many ways. But it still can not hide the built in device ID.