I have this machine. It sweeps signals very well. It doesn't get them all, but WIFI and BLUETOOTH and other cell freqs, no problem.
Make a plaster of neodymium magnets and put over site - the big magnets, 1 inch diameter. Worked on a few people I know. Takes about 30 seconds because nano tech has no shielding.
https://yeshuafreedom.com/w/srrk98B1QUdbTSsiXdUs9z