I’m trying to remove malicious app from the device administrators and it does not work. That is, I click on the app name, select Deactivate, after that, my phone immediately turns off. After a minute or two it turns on, but the app as an administrator has remained.
This app is a virus, so I want to turn it off. Because otherwise it can not be uninstalled.
In order to remove a malicious or adware app from the device administrators, try the following step-by-step instructions:
1. Install KIS from the Google Play Store https://play.google.com/store/apps/details?id=com.kms.free or Malwarebytes Anti-malware https://play.google.com/store/apps/details?id=org.malwarebytes.antimalware
2. Run and perform a full scan of your Android phone. It will take a long time, but be sure to wait until the end! When the scan is completed, delete the detected malware.
3. Now try again to remove the malicious app from the device administrators. Open Phone settings, then Security, then Device administrators. Uncheck the box next to the malware. Confirm your actions. If a window appears with the message “To roll back the updates, a full reset of the factory settings is required. All information on your device will be deleted .. “, then click on OK. This message was created only to scare you.
4. If step 3 was successful, open the Applications section of the Phone Settings and uninstall the malicious app.
For more information, see this article: How to remove virus from Android phone.