Article ID : SX573003 / Last Modified : 22/10/2020

What is the difference between VoWiFi and VoIP?

    IMPORTANT: This article applies only to specific products and/or operating systems. Check Applicable Products and Categories for details.

    What is VoWiFi?

    VoWiFi (Voice over Wi-Fi) is a telephony service provided by your network operator. It means that your network operator provides a voice call service using Wi-Fi.
    To use VoWiFi or Wi-Fi Calling, your device needs

    • operator-customised software
    • your subscription (incl. SIM card) must support Wi-Fi Calling for the device model you're using.

    To check if your subscription and SIM card support VoWiFi/Wi-Fi Calling, contact your mobile network operator.

    To make a VoWiFi call, you need the recipient's phone number. But, your network operator decides if VoWiFi/Wi-Fi Calling is enabled or not in your device.


    What is VoIP?

    VoIP (Voice call over IP) is a SIP (Session Initiation Protocol) call technology using IP packet data service. In other words, it's an online call.

    Although a SIM card is not required, you still need an IP connecting (Wi-Fi or mobile data) and access to the internet.
    That's why VoIP calls are not operator dependant.