All my devices share the same data plan. It cost 10 dollars to add a tablet to your phone's data plan through Verizon. At least it does here. I have a 14 GB limit, which is twice what I need in a typical month (some of it through promotions that applied when buying new devices). Overkill, but it cuts down on the stress (if you don't count bill paying day). I have two iPhones and two iPads on my plan; though my mother's devices rarely leave home, so their data usage is trivial. Edit: Changed AT&T to Verizon. I was with AT&T for over a decade before I got an iPhone, so I keep making this mistake.