How do I block and unblock a contact on Signal?

Applies to: Signal Messenger (Android, iOS, Desktop)
Last updated: September 2025

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Problem

You may want to stop someone from messaging, calling, or seeing your profile details on Signal. Later, you might decide to unblock them.

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Solution

Signal allows you to block contacts so they can’t interact with you. You can unblock them anytime from your settings.

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Step-by-step Instructions

Step 1: Block a contact

1. Open Signal.
2. Go to the chat with the person you want to block.
3. Tap their name at the top.
4. Scroll down and tap Block User.
5. Confirm to block.

Alternative method:

1. Go to Settings > Privacy > Blocked Users.
2. Tap Add blocked user.
3. Select the contact to block.

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Step 2: Unblock a contact

1. Go to Settings > Privacy > Blocked Users.
2. Find the person on the list.
3. Tap their name and choose Unblock.

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Optional Methods or Tools

• On Signal Desktop, blocked contacts sync from your phone, but blocking/unblocking must be done on mobile.
• If a non-contact harasses you, you can Report Spam when blocking them.

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Best Practices / Tips

• When blocked, the user cannot:
  • Send you messages or calls.
  • See your profile photo or updates.
  • Add you to groups.
• Blocking doesn’t delete the chat — you can clear it manually.
• If persistent harassment occurs, report the account to Signal Support.