My wife and I share the account while on the same flight. You just can't have BOTH devices connected at the same time. This goes for when I am flying solo also with my phone and my laptop connected. What happens is you connect the first device fine, then when you connect the second device, it auto-disconnects the first device. You basically have to keep flipping back and forth as you use both devices. You have to re-logo on each time you go back to the other device, but it's almost never the full login process, usually just that random 5-digit code they make you type in. Kind of a pain, but still cheaper than paying the extra for the 2-device setup tier. They do offer one by the way...