How blocking works on iPhone
When you block someone on iPhone, that person cannot call you, text you, or reach you through FaceTime. Their calls go straight to voicemail as if your phone is off. Their text messages do not arrive — they see a "delivered" status on their end, but you never receive them. If they try FaceTime, the call fails without ringing on your device.
Blocking is one-way. The blocked person does not get a notification that you blocked them, but they will notice they cannot reach you. If they call, they hear silence or your voicemail greeting. If they text, their messages appear to send normally on their screen, but you will not see them. This asymmetry is intentional — it prevents the blocked person from knowing for certain whether you blocked them or straightforward stopped responding.
Blocking affects only the iPhone, iPad, or Mac where you set it. If you block someone on your iPhone but not on your iPad, they can still reach you through the iPad. Each device maintains its own block list. iCloud does not sync your blocks across devices automatically.
Key Takeaways
- Blocked calls and texts do not reach you or generate notifications, and the blocked person sees a "delivered" status even though you never receive the message.
- You can block someone through the Phone app, Messages app, or by going to their contact card in Contacts.
- Blocking is device-specific — you must block the same person separately on each iPhone, iPad, or Mac you own.
- You can unblock someone at any time by finding them in your block list and selecting unblock, and they will when ready be able to reach you again.
How to block someone through the Phone app
Open the Phone app and go to the Recents tab at the bottom. Find the person you want to block and swipe left on their name. A red circle with a minus sign appears on the left, and a flag icon appears on the right. Tap the flag icon — this opens a menu with the option "Block this Caller." Tap it, then confirm by tapping "Block Contact" in the popup.
If you want to block someone who has not called you recently, go to Contacts instead. Find their name, tap "Edit" in the top right, scroll to the bottom, and tap "Block this Caller." The same confirmation popup appears. After you confirm, their name moves to your block list and they can no longer reach you by phone.
How to block someone through Messages
Open the Messages app and find the conversation with the person you want to block. Swipe left on their name or message thread. A trash icon and a flag icon appear. Tap the flag icon to reveal more options, then tap "Block this Caller." Confirm the action in the popup that appears.
Alternatively, open the conversation, tap the person's name or number at the top of the screen, and scroll down to find "Block this Caller" near the bottom. Tap it and confirm. Blocking someone through Messages prevents them from texting you, but does not block their calls — you must block them separately through the Phone app if you want to prevent calls as well.
How to block someone from their contact card
Open the Contacts app and find the person you want to block. Tap their name to open their contact card. Scroll to the bottom and tap "Block this Caller." A popup asks you to confirm. Tap "Block Contact" and the person is now blocked across calls, texts, and FaceTime.
This method blocks the person completely, not just for one app. It is the most thorough way to block someone if you have their contact saved in your phone. If you do not have them saved as a contact, use the Phone or Messages app instead.
What the blocked person experiences
When a blocked person calls you, the call fails after a few seconds of silence. They do not hear a busy signal or a message saying they are blocked — the call straightforward drops. Some blocked callers report hearing their own voicemail greeting, which can be confusing. If you have set up a voicemail greeting, they may reach it, but you will not receive any notification that they called.
When a blocked person texts you, the message appears to send normally on their screen. They see "Delivered" below the message, just as if you received it. They have no way to know from the Messages app alone that you blocked them. They only realize something is wrong when you do not respond over days or weeks, or when they try to call and the call fails.
Blocked people can still see your public social media profiles, find you in shared group chats, and contact you through other people's phones. Blocking on iPhone does not prevent them from reaching you through other channels — it only stops calls, texts, and FaceTime on your device.
How to see who you have blocked
Go to Settings and tap "Phone." Scroll down and tap "Blocked Contacts." A list of everyone you have blocked appears. This list is the same across Phone, Messages, and FaceTime — if you blocked someone through any app, they appear here.
To unblock someone, tap "Edit" in the top right, then tap the red minus icon next to their name. Tap "Unblock" to confirm. They can now call, text, and FaceTime you again. You can also swipe left on a blocked contact and tap "Unblock" without entering edit mode.
Blocking does not delete past messages or calls
Blocking someone does not erase your conversation history with them. Old text messages, call logs, and FaceTime records remain in your apps. You can still see the conversation thread in Messages or the call history in Phone — blocking only stops new messages and calls from reaching you.
If you want to delete the conversation as well, you must do that separately. In Messages, swipe left on the conversation and tap "Delete." In Phone, swipe left on the call history entry and tap "Delete." Blocking and deleting are two separate actions, and doing one does not do the other.
Frequently Asked Questions
Can a blocked person tell I blocked them?
They cannot tell for certain from the iPhone alone. Their calls fail and texts appear to deliver, so they might suspect you blocked them, but they will not receive a notification. They could test by calling from a different number or asking a friend to contact you. If you want them to know, you would need to tell them directly.
If I unblock someone, do they know?
No. Unblocking sends no notification. They will only know if they try to reach you after you unblock them and succeed, or if you tell them. Unblocking straightforward restores their ability to call, text, and FaceTime you — it does not alert them that the block is gone.
Does blocking someone on iPhone block them on iMessage too?
Yes. Blocking through the Phone app, Messages app, or Contacts blocks the person across all services — calls, SMS texts, iMessages, and FaceTime. You do not need to block them separately in each app.
What if I block someone but they have my number saved under a different name?
Blocking is based on the phone number or Apple ID, not the name in your contacts. If you block a phone number, that number is blocked regardless of what name you or they have saved for it. If they call from that number, the call fails.
Can I block someone without them being in my contacts?
Yes. You can block a number directly from your call history or message thread without saving them as a contact. Swipe left on the entry in Phone or Messages and tap the flag icon, then select "Block this Caller." The number is blocked even if you have never saved their contact information.