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

airplane mode: Here's why electronic devices are put on airplane

Are there any repercussions to not having a phone on airplane mode while flying? - Quora

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

What Is Airplane Mode? How Does Airplane Mode Work?

Advice for nervous flyers – Travel guide at Wikivoyage

What happens if you turn on airplane mode in a flight? Can I use my internet and other facilities? - Quora

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

What happens when you don't switch your phone to aeroplane mode on

What happens when a passenger's cell phone interferes with aircraft systems due to not being in airplane mode? - Quora

What is the purpose of Airplane mode?

What Is Airplane Mode, and Do You Really Need to Use It on a

Why mobile phones and electronic devices are put on Airplane mode

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