Blocking a phone number or contact on your iPhone is easy to do, and it's equally easy to unblock that blocked number or contact should you need to.

Problematic callers can be blocked on a per-number basis on an iPhone -- the process is simple. But how do you unblock a number if you've made a mistake?

You hate them. You hate them not. Here's how to unblock someone on iPhone so you'll once again receive calls from them.

Thankfully, it's pretty easy to unblock a blocked number on your iPhone. All you have to do is go to your Settings, read down, and select Phone.

Has the time come to unblock a co-worker, former partner, or telemarketer? Here's how to do it on your iPhone in a few simple steps.

You can block or unblock a number on an Android phone using the built-in Phone app's "Blocked numbers" menu.