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Even when the phone is locked, notifications may appear on the screen that can contain sensitive information. You can change the visibility of these notifications in your phone settings by deleting all notifications or editing notifications in an individual application.
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You should always install software security updates. In addition, applications used on the phone should be updated regularly. It is good to note that at some point the phone's operating system and applications come to the end of their life cycle. Meaning that there will be no more new updates. Therefore, the phone becomes more insecure and its use may exposes you to security threats.
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