What happens if someone does not turn airplane mode on a flight

What happens if you don't turn on phone's flight mode when flying

Is It Safe to Use My Cellphone on an Airplane? - AirAdvisor

What would happen if someone turned off airplane mode mid flight? - Quora

Why do iPhones sometimes have better signal after turning airplane mode on and off? - Quora

TIL: What Happens If You DON'T Put Your Phone On Airplane Mode On

5 reasons why you want to use Airplane Mode more often

If I am in Bangalore and my phone is in airplane mode , and if someone calls me , will the announcement be made in the regional language? - Quora

Why Airlines Want Phones on Airplane Mode or Turned Off on Flights

Does AirPlane Mode Turn Off Location [Answered]

What should I do when the person next to me on the plane doesn't turn their phone to 'airplane' mode? - Quora

Do people actually put their phone on airplane mode when flying or do they just ignore the flight attendants? - Quora

Can airplanes pick up signals from mobiles when they're switched on and in airplane mode? - Quora