Record iPhone Calls:
1 Open the Phone app and call the person (or place) as you normally would
2 Explain to the person that you are about to record the phone call, get their permission, and explain in order to do so you need to put them on hold for a moment to merge with the call recording function
3 Tap on the “Add Call” button and dial your own phone number, this will send you directly to your voicemail answering service
4 Once the voicemail starts recording as usual, tap on the “Merge Calls” button to merge the recording voicemail message with the live call in first step
5 Have your conversation as usual, when the call is finished end them as usual by hanging up then wait a moment for the recorded phone call to appear in the “Voicemail” section of the iPhone Phone app.
This is a popular trick that many interviewers and journalists use to record a call easily without other equipment and directly from their iPhone, and it likely has other purposes as well.
* Always get permission to record a phone call, and be sure to explain to the person you are going to record the phone call. In many regions it is illegal to record a phone call without consent to do so. Knowing the legality of recording phone calls varies per region, it is entirely your responsibility to know and understand these rules otherwise you could be breaking the law.