While the introduction of what amounts to a universal SIM card in the new iPad Air 2 and iPad mini 3 brought on celebration of an impending future of easier carrier switching with just one SIM, we're only halfway there. Not only does the SIM not support Verizon, but if you try to activate it on AT&T, it will lock the SIM to that carrier.
Naturally, T-Mobile CEO John Legere used this as a moment to poke at his rivals, noting that activating an Apple SIM-equipped iPad on his magenta network won't result in any carrier locking. If all else fails and your iPad's Apple SIM gets locked to AT&T or another carrier, never fear — the iPad itself is still unlocked. Swap it out with another SIM, even a new Apple SIM from Apple, and everything will be back to freedom.
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Derek Kessler is Special Projects Manager for Mobile Nations. He's been writing about tech since 2009, has far more phones than is considered humane, still carries a torch for Palm, and got a Tesla because it was the biggest gadget he could find. You can follow him on Twitter at @derekakessler.