Direct Plug

• 1). Remove any protective wrapping or external cases from the microphone's plug. This will look like the plug for a pair of headphones.
  
  
• 2). Insert the plug into the iPhone's headphone jack, which is on the left side of the top of the phone.
  
  
• 3). Open the app with which you wish to record, such as Voice Memo or FourTrack. Some apps may require that you set up the microphone, but most allow you to begin recording immediately. Run a test recording to be sure the mic is working, and the sound quality is adequate. Adjust the volume as necessary.
  
  

Adapter

• 1). Insert the adapter's plug into the iPhone's headphone jack. The plug will look like a headphone plug.
  
  
• 2). Insert the microphone's plug into the other end of the adapter. This is usually an RCA port -- like the ports on the back of your TV.
  
  
• 3). Open the app with which you want to record. Run a test to ensure that the microphone is working, and picks up sound adequately.