Feel free to add that one if you want...

Almost forgot another downside of onscreen double-taps - once you use it in an area, just can't use it for fast single-clicking anymore.
Once you get the first click, you would have need to introduce a slight delay to decide if the input was a single click or doubleclick. This breaks fast paging and needlessly delays GUI response for single-clicks.

I hit this issue in Mieru - the whole screen is divided in half and each half is used for forward/backward paging. Paging is activated immediately once the user lifts the finger & every click turns a single page forward/backward.

If I added double-tap support, this would introduce unnecessary paging delay & users won't be able to quickly page through many pages.

In the end it was solved with a special edge paging mode, where the screen middle can be used to perform different actions by single & double-clicking the screen middle. Users can still page quickly & the middle click actions don't need to be perfomed in rapid succession (fitting mode switching) so the delay is not a problem in.

You know I'm taking about hitting the backside of the phone and not the screen itself.

Well, then the only issue I can think of is a slightly higher probability of dropping the device (as the tapping finger would be normally holding the device). Other than that it might work quite nicely.

Agreed, but I'm not using that finger for holding the phone and if this was fully implemented by Jolla you can hold the phone as if you hold it tour your ear. If ui was adjusted to this you could navigate with that grip. The only time you need to change grip is if you want to type.

Another thing. We must have a kill switch button if we can't remove battery.

I hope for some crazy design. Dont want a regular saop phone.

More than a month to ui demo and SDK.
More than two months to devices announcement.
More then X months to customer deliver.

The Following User Says STFU to Dave999 For His Useless Posts:
daperl

I have a feeling this forum is kept alive by trolls and 13 year olds.

This. Give me a dedicated button all the time!