Ok, so the phone is CDMA and doesn't have a sim card slot.
I assume the previous owner is like hardcoded (not even sure what that means) in there?
And it's difficult or impossible to delete that information because of worry about stealing phones or something?
Or is it not even programmed into the phone, but synced every time from the carrier who originally locked it?
Meaning even though there is no cell phone service the cell radio is still active and can ping something to the phone which detects its IMEI number or something?
And so if one deletes the radio files for cellular service, that is gone?