Some people say these signals are created directly from what was injected with the vacccine, although I think its from electronic devices you might be carrying:
https://www.boards.ie/discussion/2058210168/new-bluetooth-tracking-signals-in-ireland .
I actually asked this of an embalmer friend of mine who was talking about this as well, but he said virtually all Irish labs are probably compromised, working for the state etc, so it would be no use.