Hm... This solved for me: Deleting the /home/phablet/.config/com.ubuntu.dialer-app I found here: https://bugs.launchpad.net/dialer-app/+bug/1548914/comments/3
Hm... This solved for me: Deleting the /home/phablet/ .config/ com.ubuntu. dialer- app I found here: https:/ /bugs.launchpad .net/dialer- app/+bug/ 1548914/ comments/ 3