Call screen for tiny phones

[sphh]

I have a smart phone with a really tiny screen (240px x 432px - a Unihertz Jelly Pro). The call screen looks like this:

It is usable, because the buttons are above the Mobile and Dialing... text, and the hang-up button is above the Hold button (at least that's my guess for the button underneath the Hang up button). Would it be possible to improve this screen for tiny screens? I see that there is a lot of space (but probably not enough) above and below the K avatar and text.

BTW what is the Add nu.. button actually doing? I wonder, if the Hang up button could take the place of the Hold button and the Hold button the place of the Add nu.. button?

[Goodwy]

Check on version 5.5.3+

[sphh]

Thanks!
Do you know, when version 5.5.3 will become available for installation?

[Goodwy]

It is already available, but not yet fully tested.
https://github.com/Goodwy/Dialer/releases/tag/5.5.3

[sphh]

Well, I installed it from the pay store (because it's not available from F-Droid). I already downloaded the .apk file, but cannot install it. I don't want to remove the installed version and install the .apk file, because I will loose all my settings. I guess, I'll have to wait until it gets tested and becomes available in the store...