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.
Answer (1 of 2): Press and hold “1” on the dialer of any phone (Android, iPhone, flip phone, old Nokia brick…) and it will call the voicemail system. If you have not set up the voicemail yet, you will be prompted to set up your voicemail as soon as your call to the system is connected. You will

3. There are a few different ways to access your voicemail setup from your phone's keypad, and they might vary depending on your provider. One option involves pressing and holding 1 on the keypad.
I know you probably thought of this, but did you ever record the message someplace else or possibly have it playing while shooting a home video during a birthday or an anniversary? Probably a remote possibility, but you never know. Since you didn’t record over it, there might be a possibility of retrieving it. I really hope so! Please let us know what happens.