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.
Voicemail can be reached using any voicemail access number from any phone or voip app.Voicemail can be reached by dialing ones own 10 digit phone number from any phone or voip app.Voicemail can be reached by pressing and holding 1 on the phones keypad.

Keep callers on the phone with messages on hold. Make announcements while they’re waiting or being transferred.
1.) Você está conectado à caixa de correio de John Doe. Atualmente, o Sr. Doe não pode atender. Você pode ligar novamente mais tarde ou deixar uma mensagem com seu nome e número de telefone que o Sr. Doe irá lhe retornar o mais rápido possível.