The human body is conductive, so the masking tape acts as an insulator. I'm wondering at exactly what shape the antenna inside the phone is, if it can be affected that easily.
If you've ever played around with short-wave radio (I suppose people do need to be older than a certain age to have done that :) ) it's possible to improve reception if you touch the antenna.
If you've ever played around with short-wave radio (I suppose people do need to be older than a certain age to have done that :) ) it's possible to improve reception if you touch the antenna.