MSMuhammad Shahid

Secret Codes: IMEI & CarrierSecret Codes guide

Screen Unknown Senders In Messages on iPhone: How It Works

By Muhammad Shahid · · 4 min read

Quick answer

Move texts from people you do not know into their own filtered list. Screen Unknown Senders takes messages from numbers and addresses that are not in your contacts out of the main conversation list and puts them in an Unknown Senders filter, without notifying you unless you ask. The control moved into the Messages app itself.

Secret Codes: IMEI & CarrierSecret CodesDial codes, SIM & network test · Free on the App StoreDownload free →
Key facts
What it doesMove texts from people you do not know into their own filtered list.
Published forany iPhone
TypeiOS setting

Move texts from people you do not know into their own filtered list. This page explains what it does, how to use it on an iPhone and which carriers it applies to.

I build Secret Codes: IMEI & Carrier, a free iPhone app with 317 checked codes and guides, including this one. If you would rather tap than memorise, get Secret Codes on the App Store.

What is Screen Unknown Senders In Messages?

Screen Unknown Senders takes messages from numbers and addresses that are not in your contacts out of the main conversation list and puts them in an Unknown Senders filter, without notifying you unless you ask.

The control moved into the Messages app itself. Tap the filter button at the top right of the conversation list, tap Manage Filtering, then turn on Screen Unknown Senders. Tap Allow Notifications underneath to let through categories you care about, such as time sensitive texts like verification codes.

A separate Text Message Filter on the same screen sorts unknown sender texts into Transactions and Promotions folders. Filtering deliberately stops applying to anyone you have replied to three or more times, so a real contact you talk to will not stay hidden.

How do I do it?

  1. Open the Messages app.
  2. Tap the filter button at the top right of the conversation list.
  3. Tap Manage Filtering, then turn on Screen Unknown Senders.
  4. Tap Allow Notifications and choose which categories may still notify you.

Which carriers does this apply to?

Published forany iPhone
TypeiOS setting
Good to knowiOS 26 for the Manage Filtering flow described here. On iOS 17 and 18 the equivalent switch is Settings, Messages, Filter Unknown Senders. Category options vary by country.
Secret Codes code detail with Open in Phone button
The Secret Codes detail screen shows the steps, the carriers and an Open in Phone button.

See all iphone phone and message settings or every category of iPhone codes.

How Secret Codes helps

Secret Codes keeps this and every other entry a search away. Pick your carrier once and each entry says whether it is published for your line. You can save favourites, add a private note, and record whether a code worked on your line.

Frequently asked questions

What is Screen Unknown Senders In Messages on iPhone?

Move texts from people you do not know into their own filtered list. Screen Unknown Senders takes messages from numbers and addresses that are not in your contacts out of the main conversation list and puts them in an Unknown Senders filter, without notifying you unless you ask.

What else should I know about Screen Unknown Senders In Messages?

The control moved into the Messages app itself. Tap the filter button at the top right of the conversation list, tap Manage Filtering, then turn on Screen Unknown Senders. Tap Allow Notifications underneath to let through categories you care about, such as time sensitive texts like verification codes.

What are the steps for Screen Unknown Senders In Messages?

1. Open the Messages app. 2. Tap the filter button at the top right of the conversation list. 3. Tap Manage Filtering, then turn on Screen Unknown Senders. 4. Tap Allow Notifications and choose which categories may still notify you.

Where do I find Screen Unknown Senders In Messages?

On your iPhone, following the steps on this page.

Is there a dial code for Screen Unknown Senders In Messages?

No. On iPhone this is not a dial code, so you use the steps on this page instead.

Which carriers does Screen Unknown Senders In Messages work on?

It is published for any iPhone. iOS 26 for the Manage Filtering flow described here. On iOS 17 and 18 the equivalent switch is Settings, Messages, Filter Unknown Senders. Category options vary by country.

Does Screen Unknown Senders In Messages work on Android phones too?

These steps are for iPhone. Android phones have their own menus.

Will Screen Unknown Senders In Messages work outside the US?

The iPhone steps stay the same, although some features depend on your carrier and region.

What if Screen Unknown Senders In Messages does not work on my iPhone?

Check that it applies to your carrier first, because carriers decide which services they offer and can change them. If it should apply to your line, contact your carrier.

What is related to Screen Unknown Senders In Messages?

Send As Text Message Fallback. Let a stuck iMessage retry as an ordinary text instead of failing.

What else is in this category?

Turn iMessage Off Before Leaving iPhone. Stop texts vanishing into iMessage when you move to a non-Apple phone.

Can I find Screen Unknown Senders In Messages in an app?

Yes. Secret Codes, a free iPhone app, includes it with its steps and carrier details.

Sources

Secret Codes: IMEI & CarrierSecret CodesDownload free