Using a iPad air and a yoga book in school , I recommend getting the yoga book , it even includes the stylus . picture 1 Picture 2 <| sep |> Another example <| sep |> Because these satellites will be in LEO instead of GEO , they will be constantly moving across the sky . That is why SpaceX will be using phased array antennas , which can be electronically steered , rather than requiring mechanical motion of a large parabolic dish . This video is a nice nontechnical discussion of the phased array concept from Purdue UniversityvtPPAnvJS 6 c <| sep |> I don ' t think you can search text in the comments . On iOS , you can copy a comment while you reply to it , as the text is shown above the textbox . I don ' t know if that works the same on android .