Bixby Button: Launches the Bixby virtual assistant.
Camera: Used for taking pictures.
Fingerprint Sensor: Used for unlocking the device with your fingerprint.
Flash: Used for taking pictures in low-light situations.
Heart Rate Sensor: Used for detecting heart rate and other vital signs in Samsung Health.
Nano SIM / microSD Card Slot: Insert or remove your nano SIM / microSD card here.
Power/Lock Button: Press to lock or unlock the touchscreen. Hold down to turn the device on or off.
Volume Buttons: Adjusts the volume on your device.