Next we turn our attention to the brains of the phone, and after removing a few friendly Phillips screws, the motherboard slides free.

If this board already looks a bit worse for wear, that's because we previously removed the EMI shields for our video teardown. Give yourself a pat on the back if you noticed!

Near the top of the board we get a look at the S9's new heart rate and blood pressure sensors, a step up from the standard heart rate sensor seen on many phones.

This new blood pressure hardware works alongside a Samsung and UCSF co-developed research app to give users info about stress levels and blood pressure.

Say hello to Dr. Bixby.