What is the difference between VoWiFi and VoIP?
Information / Solution
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.
Note! To use VoWiFi or Wi-Fi Calling, your device needs operator-customised software and your subscription (incl. SIM card) must support Wi-Fi Calling for the device model you're using. To inquire 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.
The following Xperia devices support VoWiFi:
- Xperia 5 II
- Xperia 1 II
- Xperia 10 II
- Xperia L4
- Xperia 5
- Xperia 1
- Xperia 10
- Xperia 10 Plus
- Xperia L1
- Xperia L2
- Xperia L3
- Xperia X/X Dual SIM
- Xperia X Compact
- Xperia X Performance/X Performance Dual SIM
- Xperia XA1
- Xperia XA1 Ultra
- Xperia XA1 Plus
- Xperia XA2
- Xperia XA2 Ultra
- Xperia XA2 Plus
- Xperia XZ Premium/XZ Premium Dual SIM
- Xperia XZ/XZ Dual SIM
- Xperia XZs/XZs Dual SIM
- Xperia XZ1
- Xperia XZ1 Compact
- Xperia XZ2
- Xperia XZ2 Compact
- Xperia XZ2 Premium
- Xperia XZ3
- Xperia Z5/Z5 Dual
- Xperia Z5 Compact
- Xperia Z5 Premium/Z5 Premium
Note! Your network operator decides if VoWiFi/Wi-Fi Calling is enabled or not in your device. (Network operators in the United States do not support Wi-Fi Calling on Xperia devices after the model Xperia XZ1 in 2017).
VoIP (Voice call over IP) is a SIP (Session Initiation Protocol) call technology using IP packet data service, for example, Skype. To make a VoIP call, a SIM card is not required but you need an IP connection using Wi-Fi or mobile data to access internet. VoIP calls are not operator dependent.