How do you wrap the iPhone in metal when doing so can inhibit the performance of its wireless antennas? Innopocket’s Metal Deluxe Case ($30) answers that question: “partially.” It uses metal to cover much of the iPhone’s back, sides, top, bottom, and front bezel, but also leaves significant portions of the screen and back, around the antennas, exposed. A detachable plastic belt clip and metal screw-in nub are included in the…