The Samsung device can also make calls via mobile data (VoLTE) as well as via Wi-Fi (VoIP) in addition to the normal mobile phone network. Samsung simply calls this "WiFi calling" on its smartphones. The function can be turned on or off via the phone settings.
Note: The network provider must support WiFi calling.
- Open the Phone app
- Open the menu
- Open the Settings
- Tap on Wi-Fi Calling
- Choose a SIM card
- Enable or disable Wi-Fi Calling