For those of us in the VoIP industry, VoWiFi offers no surprises. The phone establishes an IPSEC tunnel back to the provider for secure calling using the SIP/IM

For those of us in the VoIP industry, VoWiFi offers no surprises. The phone establishes an IPSEC tunnel back to the provider for secure calling using the SIP/IMS stack. Much of the time when I am at home and not planning to go out, I turn on airplane mode then enable WiFi. Calling, SMS, MMS, etc. all work fine. It's a battery saver.