You can permanently disable your phone number from being recognized as a Signal user by unregistering your phone number.

Visit https://signal.org/signal/unregister/ or follow the steps for your platform:

• Android
• iOS
• Desktop

Android

Follow steps to unregister:

1. In Signal, tap your profile  > Advanced > Signal messages and calls.
2. Choose OK to confirm.

iOS

Follow steps to unregister and delete your message history on this iPhone:

1. In Signal, tap your profile  > Delete Account.
2. Choose Proceed to confirm.

Desktop

Follow steps to delete your message history on this Desktop:

1. Open Signal.
2. Navigate to Preferences.
   - Mac: Go to Signal > Preferences.
   - Windows: Go to File > Preferences.
   - Linux: Go to File > Preferences.
3. Select Clear Data.
4. Choose Delete All Data to confirm.