Because android doesn’t have a phone-recording system built-in, I usually ask people to have the interview on jitsi or zoom.
But if people need to call over phone, you can install an app. I have used this one before and it’s ok, easy-to-use compared to other apps: https://play.google.com/store/apps/details?id=com.toh.callrecord&rdid=com.toh.callrecord
The home screen offers four different categories for storing your call recordings—All, Outgoing, Incoming, and Important. Tap on the Settings icon. Here, you can enable or disable Call Recorder to automatically record all calls, outgoing calls, or incoming calls. You can exclude specific phone numbers from recording, tell the app to prompt for a PIN when you open it, and change the file type for the audio recording.
To record an outgoing call, simply call the other party as you normally would. For an incoming call, you don’t have to do anything, assuming you set the app to automatically record. After the call is completed, open Call Recorder. In the All section, you’ll see an entry for your phone calls. Here is where you can choose a specific recording for playback. You can also pause, go forward, go back, or slide the scrubber button to move throughout the recording. Calls can then be tagged as important, deleted, or shared via email or social media.
At the home screen you can tap on the three-dot icon () to delete a call, share it, view details on it, add it to the excluded section, or call the number.
If you have any other options you know of recording an interview, please share it in the comment section, much appreciated!