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Such applications are the first to process all incoming messages and commands, and, therefore, they can block the operation of Dr.Web Anti-theft and SMS filtering. Sometimes these applications are malicious and can pose a threat to your device’s security.
Such applications are not shown in the list of administrators and cannot be deleted by means of Android. These applications are usually dangerous.
Criminals can exploit vulnerabilities to add malicious code to some applications without changing their cryptographic signatures. As a result, these applications can acquire dangerous functions and damage your device.