1. Setting Up a Verizon or Sprint Voicemail: Open your iPhone's Phone app. It's the white phone icon on a green background on the Home screen. Tap "Voicemail".
Jun 30, 2014 · Problem:Â I was approached by a customer who asked me why his iPhone 5c wouldn’t ring even though he had, what looked to be, enough signal to receive a call. Â On the caller side, the phone would ring once and then go to voicemail. Â We tested and yes, it would ring sometimes and other times it would not.

If that doesn’t work, you may need to either live with the voicemail notification just sitting there, or you may need to try a full reset of your iPhone. It is a step of last resort but can fix most problems with iOS so maybe worth a try. Just remember to back up your phone if you decide to give it a try.
While missed calls aren’t ideal, you can let your caller know you’re still there for them by having a great voicemail greeting. The best business voicemail greetings let your customers (and potential customers) know why you’re not available and how they can best get in contact with your business. They are also short and to the point. You usually want to keep your greeting between 6 and 24 seconds long so callers don’t hang up halfway through.