Cell Phones on Airplane clear up?

Ok, I have never had this question cleared up. When are we allowed to use cell phones on an airplane, and why aren't we allowed to use them during take off?Cell Phones on Airplane clear up?
You are allowed to use them when the flight crew tells you that it is okay. They will announce it, so there is no guesswork involved.





This is typically





a. when the aircraft is parked at the gate before takeoff.


b. when the aircraft is taxiing in after landing.





The reason for the restrictions is a belief that cell phones may interfere with some aircraft systems. It also preserves the sanity of other passengers who don't have to listen to other people's phone conversations for four hours during the flight.Cell Phones on Airplane clear up?
No you can't use anything that transmits/receives radio signals, and this is for the entire trip (from fasten seat belts is turned on).





Some airlines have plans for introducing cell phone service on the plane. It would mean that they install a ';base station'; on the plane that have contacts with the phones. It then relays the signals to the ground or satellite. To my knowledge no airline have a set date for this.
never. you have to turn it off as long as you are inflight and yes, it does interfere with the plane's electronics (according to the mechanics and some airport people)





you can use your cell phone when the plane is on the ground, at the terminal. When the door closes, you have to turn it off
You can use them for a short amount of time when you board and after you land. You can't use them during the flight, since currently there is no service provided. There is some concern that it might interfere with the electronics/communication during takeoff and landing.
This gets dealt with about every day here. What needs clearing up?
You can use them after about 10,000 feet, but I don't see why you would want to (no service). You can't use them during take-off because it could mess up radio communications with the Air Traffic Control Tower.