The iPhone Duo is costly, and fixing it comes at a high price as well.

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The iPhone Duo is finally available, and you might be interested in one after reading our iPhone Duo review . There can be some justification for its mighty $2,000 price tag if you see it as combining an iPhone with an iPad mini . If you want to be a little more productive on the go when you don't have your laptop, here's your answer. It should also be a killer ereader and YouTube player.

With such a high barrier to entry, it can be tempting to skip iPhone Duo add-ons of the sort you'd normally pick up alongside a new phone. You probably already have enough cables and chargers. Heck, you might even think to skip a case if you're careful about how you hold and stash your new foldable.

One extra you probably shouldn't dodge, though, is AppleCare+ or AppleCare One . While it adds hundreds of dollars to your phone's lifetime price, the penalty if something goes wrong could be even more severe.…