It's been years since I've had to pay for onboard wifi, but since there's a gaping lacuna between the sunset of tmo free internet and the wide rollout of free internet for all, I've been put into this situation. If I'm flying from A-B-C and meeting up with someone flying Z-B-C with the B-C leg together, does anyone know if can I buy the 2 device pass and have them use my login on their Z-B flight? Does the service require that both devices are accessing the internet on the same plane, or does it honor 2 devices accessing at a time regardless of tail number?