Recently more and more Samsung phones are released with the dual SIM option in all markets and they don't support rSAP out of the box. So I though I should try to find out why my app also does not work on these phones. I bought a cheap Galaxy J3, checked what happens inside my app and got it running!
So if you have a S9, S10, A6 or whatever recent Samsung Duos phone (and it's already rooted) you may test my app with this installer version in the forum.