I know I'm supposed to turn my phone to flight mode but I often use my phone on planes so I know it works. I've been doing this for years. Jets are not faraday

I know I'm supposed to turn my phone to flight mode but I often use my phone on planes so I know it works. I've been doing this for years. Jets are not faraday cages. The speed of the jet slows down your connection and you need to be over a city but it works just fine. I can browse the web, watch youtube vids, etc. I don't make calls on a plane cause that would just annoy everyone around me but I'm confident it will work.