Audio/headphone jack: Used to plug in your headset or headphones.
Camera: Used for taking pictures.
Fingerprint sensor: Used for unlocking the device with your fingerprint.
Flash: Used for taking pictures in low-light situations.
Microphone: Built-in microphone used for phone calls and voice commands.
Nano SIM card slot: Stores your nano SIM card.
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.
Speaker: Used to play sounds on your device.
USB/charging Port: Connects your phone to the battery charger or to another device for transferring data.
Volume Buttons: Adjusts the volume on your device.