I advise you to go to the website https://apps.apple.com/us/app/call-recorder-for-iphone/id1503665233, an easy-to-use and quite convenient application. With it, I can record incoming and outgoing calls, save and share your recordings. All I need to do is just open the app, click the "Record" button and continue the conversation as usual. After the call ends, I can access the recording and play it back. This is a mandatory tool for business.