[Galaxy S8/S8+] Why is the fingerprint reader on the back?
Samsung moved the fingerprint reader on the back for the following three reasons:
1. Feedback & Familiarity: Galaxy users are used to having a HRM sensor in the same position and we
received positive feedback from customers regarding its position.
2. Infinity Display¹ : We have moved the fingerprint reader to the back to create the Galaxy S8’s
3. Battery: To optimize the design of the device and create room for the battery.
¹Disclaimer : Bezel-less, full-frontal edge-to-edge screen.