Go to the Phone app, then tap the Voicemail tab.Tap Set Up Now.Enter your password,* then tap done.Record a custom greeting or use the default greeting, then tap Save.
Whatever situation you’re in, there are times we find it necessary to avoid making certain important calls. Instead, you may prefer leaving a voicemail. However, if you simply call the person’s phone number, they might pick up and not give you the chance to leave a voicemail.

Most people screen their phone calls and often avoid answering unknown numbers. If you’re applying for new positions, you should try to view each unexpected call as an exciting opportunity! In the event that you simply can’t pick up the phone, you’ll want a polished voicemail greeting to let the caller know they’ve reached the right person.
In certain situations, it’s a good idea to let a call go to voicemail. If you’re in a loud area, unable to spend 10-15 minutes talking, or are otherwise distracted, don’t answer. Recruiters who cold-call candidates will understand that you’re simply unavailable – but make sure to return calls in a timely manner. If possible, call back during regular business hours.