It appears Graphene Hydroxide is the culprit; makes nano-antennae in people's tissue.

When said person is in an electromagnetic environment, Bluetooth People start transmitting their own signal.

Mere analogue radiowaves doesn't do it - digital signals do.

Graphene Oxide thus forms the basis to remotely influence victims' own neurological patterns, as well as enable them to be registering as literal devices that can be trackes by any Bluetooth measuring device in your nearby S.M.A.R.T. City.

This is the new S.M.A.R.T. grid.