The Microsoft Surface Duo is now available for pre-order and it costs a whopping $1,400 – that is not cheap, but the phone has a rare dual screen design with a hinge that allows it to fold in half. CNET got an exclusive in-depth look at the hardware, including a teardown. Let’s see where all that money goes. The hinge is pretty standard, you can find similar designs on many laptops. The Duo is not a foldable phone and it avoids all the complexities associated with those, instead it’s built on tried and true technology. Like the Snapdragon 855 chipset. It’s a year old now, but...