No, the handset pictured above is not another leaked iPhone 4G production unit, but rather a custom made titanium case. The Modmyi user says: “It’s made out of a special titanium alloy that is RF transparent. I had tried aluminum but that was a complete disaster.” Continue reading for one more picture.
For CNC you will need a very high resolution machine, and molding is not available to mere mortals. Only someone at an aerospace company, a high end prototyping shop, or a factory would be able to pull this off.