Can the mobile phone be turned on after the plane takes off?

Strictly abide by the regulations prohibiting the use of electronic equipment such as mobile phones during flight;

1. has absolutely no harm to flight safety. Don't gamble your life.

2. Those who violate relevant regulations will be punished accordingly until they bear corresponding criminal responsibility.

The harm of electronic equipment such as mobile phones to flight safety;

Any radio communication equipment needs to occupy certain spectrum resources for communication. If there are other radio signals in this spectrum, they will interfere with each other and make the judgment of the received signal wrong. For civil aviation, absolute safety is required, that is to say, radio communication is absolutely correct and reliable, and there is no interference in the radio navigation frequency band. Although the frequency band occupied by paging and mobile phones is different from that of radio navigation, there are always out-of-band stray signals in radio equipment, and intermodulation interference will occur when conditions are ripe, especially the signals emitted by equipment based on time division multiple access (such as GSM mobile phones) with intermittent pulses, and the out-of-band stray signals are more serious. Everyone may know that when you are talking on a landline or working on a computer, if there is a ringtone or the phone is turned on, the receiver of the landline or the speaker of the computer will make an uncomfortable squeak. This is the interference of mobile phones on electronic equipment. It is conceivable that if you make a phone call or turn on your mobile phone on the plane, the electronic equipment on the plane, including navigation equipment, will have a similar reaction. Think about how serious the consequences will be if this interference affects the normal operation of the aircraft. Therefore, it is forbidden to make cell phones or switch planes.