Unfortunately, there’s no built-in button in your iPhone’s phone app for recording calls. Instead, you’ll have to use a third-party app or service or use a clever workaround.
Here’s a simple clinician voicemail script if you want to keep your message to the point. Hello. You’ve reached Highland Family Counseling Services. We are currently unable to take your call, so please state your name, phone number, and a detailed message after the beep. We will return all calls within two business days.

5. Hit “Record” on Audacity. Then, on your phone, play the voicemail you’d like to record. When your message is done, stop recording. If you want to get really fancy, you can use Audacity to chop off any dead air at the start or end of your recording.
Most of the time this error is caused by the connectivity of your phone to a cellular network or WiFi connection. The easiest way for solving this issue is by turning the Airplane Mode ON. On your main screen of the phone, you can swap down the notification bar and tap on the Airplane Mode option. Once it is ON all the connectivity to your phone will be turned off. You can wait for 30 seconds and then turn it back OFF by using the same method. This option can vary depending on the device you are using. For some devices, you need to go to settings or use the power button on the phone to get to Airplane Mode. After applying this method, you can now try updating or setting up the voicemail greeting on your phone.