New iPhone 5 Backplate

Designs and so called physical examples of the new IPhone 5 backplate were leaked across the Internet recently. The supposedly new backplate of the Siri touting 4s successor is a nicey integrated all in one lightweight component. With the backplate having the phones antennae built in to it we can only wonder if there is some sort of signal booster to negate the pasts controversy with previous IPhones supposedly dropping calls because of the loss of mobile signal whilst held at different angles.