For all those people who don't have a privacy screen filter and do not find the "solution" to put the phone away acceptable:
- Choose a window seat with seats where the orientation changes. The good
seats are an A, the entrance is E, the bad seats are an F, explanation follows:
E |FA|AA|AF| E
Near the entrance it is very easy to see the phone from the window seat. The only exception is that there is an opaque screen behind you, in this case F changes to A, the seat is ok. Hold your phone so that the angle between window pane and screen is less than 45° and hold it also upright, this prevents reflections and being angled prevents that your direct neighbor can see it. Because the neighbor behind you sits normally with the head in the opposite direction, it would be very conspicous and rude if he tries to change his orientation on the seat to watch your screen (Exceptions are children, they are insatiably curious and often sit inverted, but in this case I normally don't mind if they are watching).
If you on the other hand are standing, you need a jacket. Put the phone against the inside of your jacket like if you are putting your wallet in and view it by glancing downwards and sideways. Disadvantage: It is a quite unnatural position, so the people who watched you see that you are hiding your phone and the people who did not watch you see only that you are hiding something in your jacket. So I recommend that only if an asshole does not stop trying to watch the screen despite being noticed by you and other people.