I just realized that phone and pc may know its location by wifi signals. So in theory you may still be identifyable by location habits even if you have taken care of noKYC sim card and everything else. So for proper privacy, I guess, the noKYC device must be disconnected from batery whenever not in a secure location. And no other devices should ever go to the secure location. I hope wifi chips are not capable of announcing themselves nor store any info within themselves while without batery?