The front of the Zenfone 3 has a thin - bezel LCD panel with three capacitive touch keys on its bottom. (techone3.in)
Also on the both sides of the home button, you will find invisible backlit capacitive touch keys. (pcquest.com)
In another set of pictures Android Policefound in a system dump from a Galaxy Tab S3, you can see illustrations of the supposed S8's new software nav buttons that Samsung is using in place of capacitive touch keys and the back of the phone, which offers what looks like a single rear camera and a rear - mounted fingerprint reader. (tomsguide.com)