Specifically mentioned in the video: "Some electronics may still be active and power-cycling may take upwards of 30 sec". Then again, you could just do a batte

Specifically mentioned in the video: "Some electronics may still be active and power-cycling may take upwards of 30 sec". Then again, you could just do a battery pull. Then again, there might be a cap which keeps the GPS on... Thus it's probably safer to put your phone into a Faraday cage so one doesn't need to worry about trusting hardware manufacturers.