Many of us believe that the flight mode is not important to him in the plane has nothing to do electrical and wireless systems for the aircraft and regardless of its importance will not lead to a crash Absolutely.
What you should know that the flight mode is activated in the plane so as not to bounce cell phone signals with watchtowers signals, it is not there a danger that is not activate this situation by the other, but if all passengers use the phone normally during the flight is likely to be It faces a big problem pilots to communicate with the control tower, where his cause disturbances emitted by radio communication.
It did not record any trip after the aircraft had problems with the phone that has not been disabled by the flight mode, but it is the journey Almsthassantfielh even be free of any technical problem suddenly.