@mardy Thanks for the reply. I am using an Owncloud server in my home network and got syncevolution on my ubuntuphone working as described in this blog post: http://notyetthere.org/syncing-ubuntu-touch-with-owncloud-or-any-carddav-server/
I also got syncevolution working, previously with Owncloud, currently with Synology's built-in carddav and caldav server.
This is not user-friendly, because i had to manually type all syncevolution configuration codes via Terminal on my ub phone :s
Adding generic caldav accounts is fixed in Calendar app now, but adding generic carddav accounts would be great
I can help with translations. Testing is possible, but it's also my daily driver, so it mustn't break anything serious..