Once you have your message, you need to actually record it. The exact process varies depending on whether you’re using a cell phone or office phone, but here’s the basic process: Press the voicemail button, or press and hold 1 on most cell phones. Enter your password. Record your message. Listen to the message you just recorded. Follow the prompts to save your message. Following Up on Voicemail Messages
Voicemail password and greeting. If you haven’t yet set up the Voicemail on your iPhone, the process is easy and onscreen prompts walk you through it. Open the Phone app and select Voicemail > Set Up Now. Create a password and a greeting. If you would like to change your Voicemail password or greeting down the road, these are both simple to

Before you push record, be sure to tell the person on the other end of the line you're recording; depending on your location, you may be breaking a law if you don't. Some US states—like New York and even the feds—only require one-party consent, which means you can record without telling the other person or persons. In California, all parties must know they're being recorded—even if the recorder is out of state. Under federal law, one-party consent is okay, but only if you're part of the conversation; otherwise that's considered eavesdropping.
Access to Visual Voicemail does not negate traditional voicemail access. You can still access it by tapping the 1 key on your phone.