I too am preparing to test for my license as well. I understand the tech side of cell phone, but it is just plain fun to key up and communicate sometimes. I feel cellular has its purpose, but for constant communications with members of a group, (ex.-travel in any form), it is much simpler to key up , get your point across and move on. Cell works, but its less useful for many applications when I feel i could key up and speak, vs, flip open phone, dial, connect, speak, complete call, and move on.
A great example of this is when I have been on trips with groups of people, lets say hiking for example, it is much easier to key up and speak-and never have to even pause while on the trail

-just a thought.