Here's how to do each. Note: If you want to block your own number and hide your caller ID when calling others, type *67 before the phone number you're dialing.

Can you know for sure if you’ve been blocked? It’s hard to know with 100% certainty that someone has blocked your number. In fact, it’s impossible to do it through technical means alone.

4. Simply toggle off Show My Caller ID to block your number when calling someone. If you don't see "Show My Caller ID" in your iPhone settings, your cell phone carrier may not have this capability.

Find the number you want to block and then tap the little “info” circle on the right. From there, tap “Block this Caller” and then “Block Contact.” That’s it. Block calls on any phone ...

When you block someone's number on your iPhone, that number can't call, text, or FaceTime you. It won't affect third-party apps like WhatsApp, though.

2. Tap Advanced at the bottom. 3. Switch on the options you want to enable. You can block withheld or unknown numbers, show the number of blocked calls and messages or activate notifications.