Yes, you can connect any Smartphone to your Podtrak P4 using a TRRS cable, which will allow you to speak to people over the phone and record your co-host or guest through input 3. You can also do this using a computer connected to the USB port on input 4. NOTE - Make sure you buy the right cable. It must be a TRRS cable and not a TRS or TR cable. If you get the wrong cable you will hear the audio coming from your guest or co-host but they won't hear you. A TRRS cable has three rings in the plug. Another option is to purchase the ZOOM Bluetooth adapter and connect your iPhone or other devices via Bluetooth.