Ok, now I know what was the problem - the preffered SIM function wasnt active! I was sliding the button, but you have to press it (looks like Jiayu special slide button whatever...)
Anyway now I see that for some contacts it is working and for some it is not.
When not working I see the normal choose SIM popout even though in the settings I have set one SIM for all calls. When I choose from the popout one SIM then I see
screen from the MTK Control app....
I have not been using other dialer so far.
Oh and other functions seem to work.
BTW. I haver sent the log to your mail.
when using the recent call log, those entries are associated with one of the SIMs. If by any chance you have defined to use the other SIM as default, it will ask you to choose the SIM. This behaviour happens in some ROMs, meaning that not every one should see this "problem".
This being said, try to make the call from the phonebook, or even better use other dialer. There are some very good looking and with some very useful functions available for free from the Google Play. The way that the stock dialer places calls makes it impossible to make this work perfectly since the stock dialer is a system app and have priority over my app. This is not the case with other dialers, and hence my app works much flawless with other dialers.
(I don't know if I addressed your current problem. If I'm missing something let me know).