What to do if an unknown sign in or hacking attempt is found

Last Update date : Apr 03. 2026

First, check your Samsung Account’s activity.

If you find any of the following information in your account, this could mean your account is being used by someone else.

  1. A new sign-in notification email when you did not sign in.
  2. Any changes in your settings.
  3. Any activity in your account that you did not initiate.

4. Any unknown activity in any of the services you use. For example:

  • Cloud data: Look for any backup, sync or delete operations you did not initiate.
  • Galaxy Store / Galaxy Themes: Look for any unknown purchases or deleted purchase history.

Step 1. Navigate to Settings and tap Security and privacy.

Step 2. Tap App security, and then App protection. Tap Scan phone .

If you have some apps on your phone that are causing problems, you can determine which ones should be deleted by using Safe mode. In Safe mode, your phone will not run any third-party apps. While in Safe mode, uninstall any suspicious apps.

Step 1. Boot your device into Safe mode. 

Step 2. Open Settings, and then tap Apps.

Step 3. Check the list for apps with blank or random letters in the name, apps you don't recognize, or apps you have identified as problematic.

Step 4. Uninstall any suspicious apps.

Sometimes while browsing the web, you’ll see an ad that indicates that your phone has been hacked. You can use Ad blockers in Samsung Internet to prevent pop-ups.

Step 1. Navigate to and open Samsung Internet, and then tap Menu (the three horizontal lines).

Step 2. Tap Ad blockers, and then choose the services you’d like to use.

Your phone’s Auto Blocker feature will block threats and other suspicious activity. Maximum restrictions in Auto Blocker provides increased protection as well.

Step 1. Navigate to and open Settings, then tap Security and privacy, and then tap Auto Blocker.

Step 2. Tap the switch to turn on Auto Blocker.

Step 3. Tap Maximum restrictions.

Step 4. Tap the switch to turn on Maximum restrictions. Keep in mind that this option will restrict some features.

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