Voicemail is stupid. It's 2016, and voicemail shouldn't even be a thing any more. Have these people who insist on leaving voicemails ever heard of texting? It's this newfangled thing that has been around for OVER TWENTY YEARS.
If you're like me, and you haven't checked your voicemail in years—and if your voicemail is currently at 98% capacity because you have years of undeleted messages—then grab the No More Voicemail app.
Once you install this free app from the App Store and go through a brief setup, you'll never have to worry about voicemail. If someone calls you, this app will send all your ignored and unanswered calls to a recording of an endless phone ring loop. Essentially, the recording will play until they give up and decide to hang up, but you won't be bothered at all.
It's easy to deactivate, too, but I suspect you'll never want to do that. Because why would you want to go back to using voicemail when you don't have to?