You can view and manage the greeting in Greeting Management.
If you haven’t set up any voicemail on your android, you can follow this step by step tutorial:

If your landline doesn’t have a way to save messages already built in, the best way to save that gorgeous message is with a recorder. But before you rush out to get it, don’t forget that most smartphones have a built in recorder. Try that first and see if it will pick up her voice loud and strong. It should save the message as an MP3 automatically, that you can send (via email or text) directly to your computer for safe keeping. If the quality is not great, then you can borrow a recorder or purchase one. We like the Olympus brand ourselves, because they save in MP3 and can upload to a computer wirelessly. We have the vtech phone/answering system indicated above. The outgoing message/greeting is of my young daughter’s voice and we would like to save it somehow. Am wondering if you have a process or can suggest how an outgoing/greeting message can be downloaded for safekeeping.
The script is relatively similar, but the doctor is including a good reason for not being available, so patients don’t feel like they’re being ignored. He’s also left another avenue for patients to get in touch if they need some urgent help.