Block messages from your device.
In this tutorial, you will learn how to:
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• Block messages
• Unblock messages
• View blocked contacts and numbers
• Filter iMessages from unknown senders
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1. From the home screen, select the Messages app.
2. Select the desired message thread, then select the Contact at the top of the screen to view Contact options. Select info.
3. Scroll to and select Block this Caller, then select Block Caller to confirm.
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From the desired contact, select Unblock Caller.
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From the home screen, select the Settings app > scroll to and select Apps > Messages > select Blocked Contacts.
Note: You can also access blocked numbers and contacts by selecting Settings > Apps > FaceTime > scroll to and select Blocked Contacts. To add new blocked numbers from the Blocked Contacts screen, select Add New.... To unblock a number, select Edit > select the  Remove icon next to the desired number > Unblock. Learn more from the Apple support article Block phone numbers, contacts, and emails on your iPhone or iPad.
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From the Messages screen, scroll to and select the  Filter Unknown Senders switch.Â
Note: In the Messages app, Filtered iMessages will be routed to a separate tab. You will not receive notifications for Filtered Messages.