Does anyone know precisely what is required in order for other Advanced Calling capable contacts to be visible in Groups - Video Calling? My sister in law also has a DT and while @ my house last night our mutual contacts were present & we confirmed video calling working. Today while I'm home and she's out & about town, the contact no longer appears. I'm on 4G and while I can't be dead certain, she should be as well since we have good coverage. Does wifi play into this? When we tested it we were both on the same wifi. Are we missing a setting other than, just enabling Advance Calling or is the People App Group things just a little wonky?