iPhone cases that do more than protect your iPhone

These helpful holsters offer some surprising features, everything from headphones to SIM cards to extra camera lenses.

If you're going to diminish the beauty of your iPhone by covering it with a case, it seems like that case should do more than merely protect the phone from the perils of gravity. Surely case makers can outfit their wrappers with useful amenities like can openers, welding torches, and java dispensers. (iKeurig, anyone?)

OK, maybe those examples are a little extreme, but there are some iPhone cases that offer more than just protection. Here's a roundup of some of the latest.

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