Here's a quick overview of how this works for the major U.S. carriers: If the voicemail on your iPhone isn't working and you need to turn it back on, it may be that you haven't set it up properly.

Slide the toggle switch beside it to turn it on. You will know it is ... unwanted calls and send spam calls straight to voicemail on your iPhone. Enjoy a more peaceful and uninterrupted iPhone ...

Here’s a primer showing how to turn it on and off, and how to get the most out of its features. Why the iPhone has a sleep mode The iPhone’s sleep mode is really a sleep focus, so it has all ...