Great question! Although I don’t know if there is a specific function for this on your particular phone, the best way to save the message is the simplest. Turn up the sound as high as you can and record it onto a digital recorder (like you would use for a lecture), a cassette recorder or your cell phone if you have a voice recorder on it. Then save it as an MP3 on to your computer for safe keeping. You can also Google your vtech model number to see if you can find an owner’s manual. They might have a way to save a recording in there. Probably not, but it’s worth a shot.
-You have reached the voice mailbox of (your name). If you’re a hot chick/guy, you may leave a message at the tone. If your one of (your name)’s friends, you may also leave a message at the tone. If you’re not hot and not one of (your name)’s friends, call back when you are.

On your computer, go to voice.google.com. At the top right, click Settings . On the left, click Voicemail. In the Active greeting section, click Record a greeting. Click Record . Record your greeting and then click Stop . To listen to the recording, click Play . To replace the recording, click Redo.
A custom phone greeting is a recording that plays automatically when a customer calls. They can be set to play right at the start as a professional welcome, as a voicemail greeting, or even as an away message when you can’t answer. Business phone greetings can give your small business a larger and more professional appearance.