You also cant have your cell on while ur flying. Last week a guy at my field had a spectrum and a new plane. He let one of the other members fly but he said you had to turn your cell phone off before you fly because it causes problems.

Not many people at my field have a spectrum so i dont know a lot about them but it kind of sucks that you cant have your phone on while your flying but it is cool you dont have to worry about channels.