So here's the deal, I currently live in the US and I'm going to buy an iPad mini with cellular. But I can't make the decision if I should go with Verizon or AT&T. I'm leaning toward Verizon. I'm from Canada and at one point may want to take my iPad mini back with me. Would it be possible to use an iPad mini that was on Verizon in Canada? Or would I have to go with the GSM AT&T version in order to unlock it and use it in Canada? Any help would be appreciated!