What I found out was; every disturbance in field induced signal; with bare hand weak signal, with coin stronger and with a magnet the most strong (from a fixed distance).
maybe metal in hand collects most body field around.
of course when we turned on cell phone or switched on an off device induced signal.
maybe metal in hand collects most body field around.
of course when we turned on cell phone or switched on an off device induced signal.

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