How to Block a Number on iPhone (It Won't Stop the Spam)

You block the number, you feel better for about a day, and then the same rubbish arrives from a number one digit different. That is the point at which most people go looking for how to block a number on iPhone properly, and find a page that tells them to tap the little i in Recents. That tap works. It is also roughly a fifth of what the block list actually does, and it is the wrong tool for the problem most people are trying to solve.

So this is the full version. Where the block switch lives in every app that has one, what the person on the other end can see, and the setting that actually stops spam calls, which is not blocking at all. I have also put the UK bit in, because the one thing that gets a scam number taken off the network for everybody is free, takes ten seconds, and no page in Google's top three mentions it.

How to block a number on iPhone: the five places Apple put it

There is one block list on your iPhone and five different doors into it. Apple's own support page lists all five. Of the two non-Apple pages currently in Google's top three for this search, each teaches exactly one of them, which is my count, not Apple's.

• Phone app: tap Recents, tap the i next to the number, scroll down, tap Block this Caller.
• Messages: open the conversation, tap the contact's name at the top, then block from there.
• FaceTime: tap the i beside the number, contact or email address in the call list.
• Mail: open the email, tap the sender's name at the top, then block.
• Settings: Privacy & Security, then Blocked Contacts, then Add Blocked Contact. This is the only route that lets you block somebody who has not contacted you yet. Apple's blocking guide has the current paths.

The Settings route is the one worth remembering. If you know a number is coming and you would rather it never rang at all, you can put it on the list in advance rather than waiting to be disturbed first.

What the blocked person sees: nothing at all

This is the question people actually want answered, and it is the one the tap-sequence guides skip. Apple is unambiguous about it: the contact "won't receive a notification that the call or message was blocked". There is no beep, no bounce-back, no message failing to send in red.

From their side the call rings out normally and drops to voicemail. A text appears to leave their phone exactly as it always did. Nothing on their screen changes, which is either a relief or a problem depending on why you blocked them.

The voicemails keep arriving, you just never hear about them

Here is the bit that surprises people. Apple states that a blocked contact "can still leave a voicemail, but you won't get a notification". The call is blocked, the voicemail is not.

So if you blocked a debt collector, a persistent ex or a cold-calling estate agent six months ago, there may well be a stack of messages sitting in your voicemail that you have never been told about. They are separated out rather than deleted. Worth a look once, if only to close the loop.

Messages behave differently again. Apple's wording is that messages "sent or received won't be delivered", so nothing lands and nothing is stored for later. Blocked email is the odd one out: it goes to the Bin, and Apple notes that email blocking works across all of your Apple devices.

One list, four apps, and why two numbers means two blocks

The block list covers Phone, FaceTime, Messages and Mail together. Block a number in Messages and that same number cannot ring you either. That part is genuinely tidy, and it is why blocking someone in one app feels more final than people expect.

What it does not do is block a person. It blocks an entry. If someone reaches you from a mobile, a landline and an Apple ID email address, that is three separate additions to the list, and blocking one of them tells you nothing about the other two.

That distinction is the whole reason blocking fails against spam, which brings us to the part most guides never get to.

Why blocking will not stop spam texts or scam calls

Blocking is retrospective by design. You can only block a number that has already reached you, and the entire business model of a spam operation is that the number is disposable. By the time it is on your list it has done its job and been retired.

The setting that actually helps is a different one, and it is buried. In current iOS it sits under Settings, then Apps, then Phone, then Screen Unknown Callers, where you choose Silence. Anything from a number not in your Contacts is silenced automatically and sent to voicemail without ringing.

• Apple's unknown-callers guide is blunt about the trade-off: add the numbers that matter to Contacts first. Family, your GP surgery, your child's school.
• Otherwise the delivery driver outside your door, the hospital rescheduling an appointment and the plumber you rang yesterday all go to voicemail in silence.

There is also fine print that I have not seen on a single page ranking for this search. Apple says call screening is switched off for 24 hours after you call the emergency services, and that it does not work while you are roaming. Both are sensible. Neither is something you want to discover on holiday.

The UK bit: 7726 does what your block list cannot

Your block list protects one phone. Reporting the number to your mobile provider can get it investigated and taken off the network for everyone, and in the UK that is a free shortcode: 7726.

Ofcom's instructions differ depending on what you are reporting, which trips people up. For a scam text, tap and hold the message, tap More, then the forward arrow, and send it to 7726. For a scam call there is nothing to forward, so you open recent calls, select the number, and copy or share it in a text to 7726 instead.

• Ofcom confirms the service is free to use and says the report "alerts your mobile provider to investigate and potentially block the number". Their 7726 guidance covers both routes.

My own view on the order of operations: report to 7726 first, then block, then turn on Silence Unknown Callers. The report is the only one of the three that does anything for anybody other than you, and it costs ten seconds.

How to unblock a number on iPhone

Settings, then Privacy & Security, then Blocked Contacts. Tap Edit, tap the delete button next to the contact, then tap Unblock. You can also unblock from inside whichever app you blocked them in.

One thing to be clear about: unblocking does not deliver anything you missed. Texts sent while the block was on are gone rather than queued, so nothing arrives in a lump when you lift it. Voicemails left during that time are the exception, because those were never blocked in the first place.

Frequently asked questions

Does blocking a number on iPhone stop text messages too?

Yes. The block list is shared across Phone, FaceTime, Messages and Mail, so a number you block in one place cannot call or text you from any of them. Apple's wording is that messages sent or received will not be delivered.

Will the person know I have blocked them on iPhone?

Not from anything your iPhone does. Apple states the contact receives no notification that a call or message was blocked. Calls ring out and go to voicemail from their side, which looks identical to your phone being switched off or ignored.

Can you block a number on iPhone without opening the Phone app?

Yes, through Settings, Privacy & Security, Blocked Contacts, Add Blocked Contact. That is the only route that works for a number which has not rung you yet, because every other route needs an existing call, message or email to tap on.

My take

Blocking is the right tool for one specific job: a person you know, who you do not want to hear from again. For that it is quiet, complete across all four apps, and gives them nothing to react to. Just remember the voicemails are still arriving.

For spam it is close to useless, and treating it as the answer is why people end up with forty entries on a block list and the same number of junk texts a week. Silence Unknown Callers is the setting that changes the volume. 7726 is the one that does something about the source.

If you are reorganising your iPhone settings generally, the settings Apple does not advertise are worth twenty minutes, and the paths above shifted again in iOS 27. If the reason you are blocking numbers is that you are about to move phones on, erasing an iPhone before selling it has its own trap worth reading first.

Source: Block phone numbers, contacts and email addresses, Apple Support