I don’t know if people realize this, but now you can start a google video chat on one device and move it to another on the fly without losing the connection. I just did a handoff from android phone, to ipad, to laptop and back. The phone was on cellular and the laptop and ipad were on different wifi networks. If you have multiple devices logged into Hangouts, each can join the video chat. Once your new one is connected, simply hang up on the old one and carry one. Very cool.