Looked through the FAQ and didn't see anything that seemed to answer my question. If I've missed something obvious, feel free to slap me and point me in the right direction...
A month or so ago, I got an Obi110 device. I am rather pleased with it, for the most part. My only complaint being that it's not super well-suited for a multi-occupant home. It looks like the 202 will be a better device to share with my wife.
That said, I think that my existing Obi110 device would be better suited for use by my widowed mother. It's simple enough in setup and ongoing use that my technophobe mother would be able to use it and I could save her on monthly phone fees. My only concern is that, aside from the device factory reset procedures, how does one unregister the device from my Obi account?
This concern comes from the fact that, when I tried to register my wife's Obi account to the 110, I'd gotten a message saying the device was already registered. I need my mom to be the device-owner after I give it to her and want to make sure that I can re-associate the device with her account.