I've got an iPad Air that I love. It's the cellular model, but I just keep the 200MB T-Mobile plan on it for "find my iPhone" or if my iPhone 5 runs dead. I use Wifi/tethering for any "normal" use, but I do leave the cellular switched on. Question: Would disabling LTE make much difference in battery life? I know it's supposed to use a little more juice, but it does it really matter if most of the time the cellular radios are pretty much idle?