You can drag down the notification panel to check the availability of this feature in your phone. This feature can also be found by following “Phone app << Three dots << Settings << Wi-Fi calling”.
For this feature to work, your phone must be connected to a Wi-Fi network and have an active SIM card inserted.
Kindly contact to the respective network operators for further formalities to be performed in case the device support Wi-Fi calling facility.
Team Samsung Members