Camera: Used for taking pictures.
Flash: Used for taking pictures in low-light situations.
Glass back: Used for wireless charging.
Microphone: Built-in microphone used for phone calls and voice commands.
Nano SIM card slot: Insert or remove your nano SIM card here.
Ring/Silent switch: Used to switch silent mode on and off.
Side button: Press to lock or unlock the touchscreen. Hold down to turn iPhone on or activate Siri. Hold down in combination with either Volume button to access emergency and power options.
Speakers: Used to play sounds on iPhone.
Volume buttons: Adjusts the volume on iPhone.