I was trying to unlock my car with a keyfob, but I was out of range. A friend of mine said that I have to hold the transmitter next to my head. It worked, so I tried the following later that day:
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the accepted answer acknowledges this possibility but suggests an alternative
the effect is probably caused by one or more of the cavities in your body (maybe your head or chest cavity) acting as a resonance chamber for the RF signal from your wireless remote
Fob have small antenna, press fob to head, body becomes big antenna, boost signal with body.
the accepted answer acknowledges this possibility but suggests an alternative