My operator plan here in Brazil is prepaid and only postpaid support voice over wifi. In android there is an option to enable according to the operator. I have 2 prepaid sim cards ( 1 is physical an other is the esim ). The operator of esim card ( CLARO ) supports Vowifi. ( there is an option to enable vowifi in android config but it doesn' t work because my sim card is a prepaid ). But my other operator ( OI ) don' t support Vowifi ( there is no option to enable wowifi in android config ) . In linux only physical sim card is supported to make calls . I have installed the dialer app and it works fine. But as I said my operator of my physical sim card don' t support vowifi , so I could not test . But even without support I didn't see any options to enable vowifi in linux . Connman is necessary to enable mobile data with sim card. Maybe someone here in this forum can help with additional information . Sorry.
