Record phone audio sessions by calling a demo line. Ensure calls sound natural with varied tone, pace, and small pauses. Conduct real phone calls with some background noise for realism. Avoid VoIP. Work with different environments like quiet, muffled voice, and speaker-mode. Enter call data on a shared sheet, including meta data, phone call code, and speaker details. Complete up to 30 phone calls in 6 variations, totaling approximately 180 calls.