Question

Why do we need to put Airplane mode?

Answer 1

Answer:

if we ever ride a airplane we dont mess up its signals and crash ,and its easier to ignore calls and texts

Explanation:

Answer 2

Assuming you mean why we need to use airplane mode when flying...

Airplane mode stops all pathways of connection coming and going from your device. It is used on planes so that the pilots can have a clear and direct connection to the ATC Tower, where workers can see the planes radar.

Hope this helps :)