As per my knowledge, WiFI calling is supported over untrusted(using ePDG/S2b) networks from Rel 10 onwards.
But I am not sure about WiFi over trusted(TWAG/S2a) networks and having few doubts.
- Is VoWiFI is supported over trusted(using TWAG or S2a) networks, if not then what are the limitation?
- Is LTE to WiFI handover supported over S2a interface(TWAG) ?
Any help, pointers will be appreciated.