So for me as long I have mobile coverage by T-Mobile any call will go through this pipeline - not wifi. My understanding was that for calls it go via wifi even mobile connection is activated but now I see on my FP6 the priority seems like another than on some other phones. It’s okay for me. Maybe this tiny “bug” will be fixed further.
Maybe I’m going to open a thread at Telekom’s forum an post their solution here if I get some accordingly to the FP6.
From what I read thats not device related, thats how Telekom wants it, see the Tkom topic I linked in the other topic
Ich habe in der Zwischenzeit mit der Technik noch einmal Rücksprache gehalten. Eine manuelle Bevorzugung von WLAN Call ist nicht vorgesehen, da die Priorisierung weiterhin auf dem mobilen Netz liegt
That’s really interesting because on my old Samsung phone with same SIM I was also connected to both and every time I made a call the phone’s UI showed me this small WiFi icon next to that phone icon that the call will be a WiFi Call.