iPhone 4 reception issue workaround

Here is a detailed thread about reception issue on iPhone 4.

And here is the issue:

Besides the obvious solution – the bumper, I may suggest another one, more design-friendly: some Zagg cut strips all over metal antennas, but (!) separated in the black rubber places, where the antennas themselves get separated.

The idea is this: the real issue is not touching the black separation strip between antennas, but short-circuiting the distinct antennas! While you’re touching 2 distinct antennas, the signal gets noisy because of frequencies mix-up.  Actually, touching the black rubber band puts in contact 2 frequencies that should never be mingled.

A small strip of Zagg insulation (or whatever transparent thin foil you may find) that prevents touching 2 different antennas in the same time will do.