I just did a test on my iphone 4 and i held it with the death grip the signals went down too 1 bar then went up , so i was like what is going on so i made a call while holding it ( Death Grip ) with one bar of signal and the call went fine without any problems , so i do believe apple that its just an issue on how the iphone 4 is displaying the signal strength.
So no problem here with reception even though it shows less signal bars
UK iphone 4 here
So no problem here with reception even though it shows less signal bars
UK iphone 4 here