You can’t call someone back if you don’t have their number. It seems basic, but it’s easy to forget. So a quick reminder can go a long way.
Once the voicemail is done, click the "Stop" button at the bottom part of the tool. You can find the recorded audio by clicking the three parallel bars at the right bottom of the recorder. From there, select the recording track and click the "Play" button to listen to the recorded voicemail. You can also click the "Folder" icon at the rightmost part of the Recording List section to open its output folder.

An option with far fewer cables is the RecorderGear PR200. It records your conversation via Bluetooth. The call button in the middle of the device can answer calls on the Bluetooth-connected phone. Hold the PR200 up to your head to talk and listen, as if it's the phone. It also features a USB end to quickly access recordings on the computer. It will hold about 144 hours of conversation before it fills up the 4GB of storage. It also records like any digital recorder sans smartphone, since it has an external pin-hole microphone.
Several users are getting the “com.apple.mobilephone error 1035” error on their visual voicemail whenever they try updating or setting up their visual voicemail greetings. Visual voicemail lets you view your voicemail message that you receive. Voicemail greeting is the message that callers will hear before they are offered the opportunity to leave you a message. However, this error will prevent users from setting up their greetings. The full error message will be “The operation couldn’t be completed (com.apple.mobilephone error 1035)“.