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.
Because you never know the quality of someone’s phone audio or your cell phone service, it's not a bad idea to give your name and phone number twice within your message. The thought being, if the person you called can’t understand who you are or how to call you back, how can they be expected to return your call?

Following these tips of voicemail etiquette and voicemail structure are a sure-fire way to give you a professional edge in your job hunt and throughout your professional career. By having a strong voicemail template to follow you can be sure that when you call your voice(mail) will be heard. I’ve Submitted My Application, Now What? Phone Call, Email, or Meeting? What’s the Best Method to Send My Message? Five Rules of Professional Phone Call Etiquette Is Your Email Address Sending the Right Message?
When you’ve lost someone special, any little detail or reminder of that person can mean the world. Google's Super Bowl commercial sure pushed that point home and showed us how instrumental tech can be in preserving those memories.