Recording voicemail greetings for your business or personal life requires a separate list of priorities, because they are being used for two distinct purposes and will be heard by two very different types of callers. I have a friend with two cell phones - one for work, and one for personal calls - and if you call both lines, you would never know it's the same person.
With this method, you don’t need a third-party app. Call the person you want to chat with, then tap the “Add Call” button on your phone’s screen. Dial your own phone number—the one you’re calling from. This will take you to your voicemail. Once your voicemail has started recording, tap the “Merge Calls” button on your screen. Now, you’ll record your phone conversation onto a voicemail message. When you’re done with the call, you can tap the share button to export it to your Mac via Airdrop, to the Voice Memos app, or transfer it via email or text message. The file is recorded as an M4A, so depending on what you want to do with it, you may need to convert it to MP3 before uploading it to other apps.

If you use your phone when you are driving, you must use a h..... f. phone. voice mail. If you call someone and their mobile isn't on, you can leave a message on their v. m.
After you hang up, the recorded call will appear in the Voicemail section of your iPhone’s Phone app. The Easiest, Most Versatile Method: Just Use Speakerphone and a Recorder. At the end of the day, the best and most simple method for recording calls on the iPhone is doing it the old-fashioned way: Speakerphone and a recorder of some kind.