@dazinism I've installed #NextCloud, #DavDroid, and #OpenContacts, as well as #K9, #QKSMS, and #Dialer2. Trying to get them all to work together smoothly is a nightmare. I get that it's a really hard problem, because I want people's contact info to be very secure when I store it, but I also want that data to be shared between the apps I need to use it with, remote backups etc.

Crisis averted ;-P I installed the #Dialer2 app from #FDroid, and I can make calls again. Now I'm curious about whether I can remove the built-in Contacts app and its accompanying bits and bobs, and replace it with a #FreeCode address book? If so, can I then sync my contacts with #DavDroid and #NextCloud? New toys ...