My V20 has just developed a problem with incoming calls on SIM1: they ring but nothing is displayed to answer them, either on the primary or secondary screens. SIM2 seems to work ok.
I've tried deleting the Contacts cache and rebooting and changing the screen for the incoming call advice, but nothing.
Contacts > App Notifications has just two options: "On" and "Icon badge", both of which are turned on, which might be correct, but seems a little sparse.
I have a feeling that this might have happened since I paired it with my car, but unpairing doesn't fix it, so not sure it's associated.
The problem goes away when I swap the two SIMs but returns when I restore them.
Anyone got any suggestions how to fix it?