Block a specific contact on iPhone

Open the Messages app and find a conversation from the person you want to block. Press and hold their name or the conversation thread until a menu appears. Tap Block this Caller or Block Contact — the exact wording depends on your iOS version, but the option will be near the top of the menu.

Once blocked, that contact cannot send you messages, FaceTime calls, or phone calls. Their messages will not appear in your inbox, and they will not receive a notification that you blocked them. If they try to call, they will hear a ring tone but the call will not go through to your phone.

You can also block someone from their contact card. Open Contacts, find the person, tap the information icon (a circle with an "i"), scroll to the bottom, and select Block this Caller.

Block unknown senders and filter messages

iPhone has a built-in filter that separates messages from people not in your contacts. Open Settings, go to Messages, and turn on Filter Unknown Senders. This moves messages from unknown numbers into a separate tab called Unknown Senders in your Messages app, keeping your main inbox clear.

This filter does not block the messages — they still arrive — but they sit in a separate place where you can review them later or delete them without seeing them in your regular conversation list. This is useful for spam texts and phishing attempts, which often come from numbers you do not recognize.

You can also enable iMessage Filtering in the same Messages settings to separate messages from people outside your contacts into a different tab. This applies only to iMessages (messages sent through Apple's service), not regular SMS texts.

Key Takeaways

  • Blocking a contact on iPhone prevents them from sending you messages, calling, or reaching you through FaceTime, and they will not know they are blocked.
  • The Filter Unknown Senders setting moves texts from unknown numbers into a separate tab so they do not clutter your main inbox.
  • Blocked contacts can still leave voicemails, but you will not see notifications for them unless you check your voicemail manually.
  • You can unblock someone at any time by going to Settings > Messages > Blocked Contacts and swiping left on their name.

Unblock a contact or review your blocked list

To see everyone you have blocked, open Settings, tap Messages, and scroll down to Blocked Contacts. This shows every person you have blocked on your iPhone. Tap Edit in the top right corner, then tap the red minus sign next to a name to unblock them.

You can also unblock someone by opening Settings > Phone > Blocked Contacts if you blocked them from the Phone app instead of Messages. Both lists are separate — blocking someone in Messages does not automatically block their calls, and vice versa.

Block messages in Mail and other apps

If you are receiving unwanted messages through email, open the Mail app, find the message, tap the flag icon at the top, and select Block this Contact. This prevents future emails from that sender from reaching your inbox.

For other messaging apps like WhatsApp, Telegram, or Signal, the blocking process is different for each one. Open the app, find the conversation, press and hold it, and look for a block or mute option. Most third-party apps have their own block feature separate from iPhone's system-level blocking.

What happens when you block someone

When you block a contact on iPhone, they cannot send you SMS text messages, iMessages, or make FaceTime calls. If they try to text you, the message will not deliver — they may see a delivery failure or the message may appear to send but never reach you. Phone calls from a blocked number will go straight to voicemail without ringing your phone.

Blocked contacts can still leave voicemails, but you will not receive notifications about them. You can listen to voicemails from blocked numbers if you go directly to your voicemail, but most people do not check voicemail regularly. The blocked person will not receive any notification that you blocked them — they will only notice if their messages fail to deliver or calls go unanswered repeatedly.

Prevent messages from reaching your phone in the first place

Beyond blocking individual contacts, you can reduce unwanted messages by being cautious about where you share your phone number. Do not post your number publicly online, and be selective about giving it to websites or apps that do not need it. Many spam texts come from data brokers who sell phone numbers, so limiting who has your number reduces the volume you receive.

If you receive a text asking you to click a link or confirm account information, do not click it — this is a common phishing tactic. Delete the message and contact the company directly using a phone number from their official website. Blocking the sender after deleting the message prevents them from sending you more.

Frequently Asked Questions

Can a blocked contact see that I blocked them?

No. They will not receive a notification. They may suspect it if their messages fail to deliver or calls go unanswered, but iPhone does not tell them you blocked them.

Will blocked messages still count toward my text message limit?

No. Blocked messages do not arrive on your phone, so they do not use data or count against any message limits. They are rejected at the carrier level.

Can I block a number that is not in my contacts?

Yes. You can block any number, even if it is not saved as a contact. Open Messages, find the conversation, press and hold it, and tap Block. You can also block a number from a voicemail or call log.

What if I block someone by accident?

Go to Settings > Messages > Blocked Contacts, tap Edit, and tap the red minus sign next to their name. They will be unblocked when ready and can message you again.

Do I need to block someone in both Messages and Phone?

They are separate. Blocking someone in Messages only blocks texts and iMessages. To also block their calls, go to Settings > Phone > Blocked Contacts and add them there too.