VoWI-FI - Voice over (EPC-integrated) Wi-Fi
VoWIFI is a service available to certain smartphone devices on the MTC network that allows traditional voice calls to be routed over a Wi-Fi network instead of the traditional MTC or other base station. The service aims to improve the call quality and user experience of voice calls when the cellular signal strength is very weak and/or the customer is roaming in a foreign country.
VOWIFI is a complementary technology to VOLTE and utilises IMS technology to provide a packet voice service that is delivered over IP via a Wi-Fi network.
The following smartphone are compatible to the VoLTE technology on the MTC LTE network: