How does a cellphone work?
A cellphone is like a two-way radio, the difference is that, when you talk to someone on a two-way radio, you have to wait for the other person to finish talking before you can answer him. The reason being, the same frequency or channel is being used for transmission on two-way radios while in cellphones, there are separate frequencies for talking and listening. So it’s more like a highly advanced feature of two-way radios.
