Samsung Galaxy S8 launch LIVE: Follow the 'Unpacked 2017' event as the iPhone rival is officially unveiled

The physical Home button has been removed, and replaced with a pressure-sensitive panel placed underneath the screen, so that the front of the device is a sheer pane of glass.
The fingerprint reader is now located on the back of the phone, next to the camera module, and is designed to be used with an index finger rather than a thumb. The phone also supports iris scanning for added security.