I am a flight attendant and would like to add my two cents' worth.
Yes, it is an FAA rule to shut off, not just put to sleep, your cell phone during taxi, take-off and landing. But the other reason is that taxi, take-off and landing are the most dangerous part of your journey on a plane. And if an emergency is happening, we as flight attendants, need 100 percent of passengers' attention.
If a large portion of passengers are on the phone and we have to run around the cabin getting everyone's attention to follow instructions, it could cost valuable minutes and possibly lives.
Just a side note: stop acting like seven year olds who were told to stop watching TV and having a hissy fit.
There are some things in life that do not make sense and that you will have to do anyway. Stop blaming the flight attendants for the FAA rule. Call or write to the FAA. - anon134477