“The reason they tell you to ask the cabin crew for help if you lose your phone is not to be friendly or show how helpful they are. It’s because if your phone is in a seat mechanism and that seat gets moved, the phone will be shredded, the battery may explode, and if it does, it will likely kill everyone onboard.”

"I have a degree in aerospace engineering, which includes a lot of aviation courses. The reason they tell you to ask the cabin crew for help if you lose your phone is not to be friendly or show how helpful they are. It's because if your phone is in a seat mechanism and that seat gets moved, the phone will be shredded, the battery may explode, and if it does, it will likely kill everyone onboard."

Note: Responses have been edited for length/clarity.