I can see why they're anti-rooting--they need to be able to offload voice + SMS traffic to wifi, and they can't do that if you've flashed a custom ROM or whatever. I think they're hoping to eventually have the wifi calling stuff packaged as an app, so it could be installed on whatever ROM (or device) you wanted. But for now, it's integrated with the android system at a very low level.

> you're out of luck if you want to cancel the service after 30 days.

Sort of. There's no early termination fee, so in that way it's better than legacy carriers. But you can't take your RW phone and use it on any other network, so you are out the cost of the device.