That issue is widely documented. But if you have no background in electronics and specifically RF design then you won't have the basics needed to enter into a discussion. It will all sound like conjecture and "magic." Some may get visibly upset over technical discussions like this so the question is not the one you asked but how would you talk to them without hurting their feelings?
Here's a question that I just cannot get a good consensus on (and if you respond, please say whether you are "conjecturing" or you have technical expertise). I frequently see max number of bars on my phone and while talking, see the bars drop. Sometimes, the signal drops all the way to zero and my call gets dropped. I know this happens to other networks besides mine (Sprint). I also am reasonably familiar with cellular technology. I can understand if I am moving and the call had to be handed off to another cell but I am standing still (not even in a car). The last time I checked, the cell towers were not moving anywhere (even though I AM in CA). What gives?
Some theories that have been proposed have been that as new users enter the cell, the ones further away from the towers get a reduced signal. OK, but does anyone know beyond a "guess"?