Hello,
I bought Threema and installed it on my phone by sideloading the apk (I have no gapps on my phone -privacy- ). I use LineageOS 17.1
My wife also bought Threema and has gapps on her phone. When she calls me, I only see it when I open my app. Is there a possibility that Threema (on my gapps-less device) stays open in the background, so I can see my wife's phone calls?