3.5mm Headset Jack
3.5mm Headset Jack Allows you to plug in an optional headset for convenient, hands-free conversations. You can also plug in headphones to listen to music.
USB/Charging Port
Microphone
USB/Charging Port Allows you to connect the phone and the USB Cable for use with the Charger Adapter, or other compatible accessories.
Microphone Transmits your voice to the other caller. It's also used for voice-activated functions.