Comment Hell Hath No Fury Like a Geek Inconvenienced (Score 1) 292
In most cases, you're talking about a few minutes before and during takeoff and a few minutes during landing. During that time, read a book.
I've certainly used tablets, phones (for apps), and laptops all other times during flight.
There is no one on this planet who can't live without the Internet for the duration of a flight. If you are so insanely important, buy the plane's service.