IDG Contributor Network: WiFi calling on cell phones only half the solution

This year WiFi calling has come to US cellphones. T-Mobile launched WiFi calling on BlackBerry devices in 2009, only recently have the other carriers followed suit, with Verizon Wireless, the last supporting this, announcing limited availability now on Android devices and iOS next year. The idea is that WiFi coverage can fill in places where cellular isn’t available. But providing better network access is just half the story. Adding handoff to cellular nets without having to disconnect the