Why should I use handheld radios instead of cellular phones?
A cellular phone is ideal for making phone calls. It is not ideal for short range point to point communications since cellular is expensive. Further, if you need to make frequent short contacts, cellular requires that you dial the phone number and wait for the connection to be established, a delay of up to 30 seconds for every call that you make. With a hand held radio you push the talk button and you talk without delay. If you need to have several people talking to each other at the same time, you can set up several two way radios on the same frequency. Each time one user speaks, everyone on thesame frequency hears that person.
http://www.verotelecom.com/blog/industrial_news/why_should_i_use_handheld_radios_instead_of_cellul.html

