But for the antenna, there must be a physical reason. There is no way you can ‘block’ reception by putting your hand on an antenna unless there is a grounding issue. But then, more than likely, you would increase reception.
I can only speak from experience, but I know on my old phones with pop up antennas that covering the antenna with my hand dropped signal strength. I experimented with it a few times and signal strength dropped when I covered the antenna and picked back up when I took my hand away.
That is odd. With light transmissions I can see it. There is no way Iphone is using analog, with analog maybe. But if you are up on 4 sites? And with a digital transmission? Digital doesn't care what is in the way. It will go through concrete.
Wonder why that would be? You simply cannot block a transmission with your hand unless something is wrong.
I wish the government would give me a million dollars to figure out ‘specifically’ with technical details why this is happening.