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Is the mobile phone Android? If LBE security master deletion is installed, it is best to install a 360 security guard to kill the virus on the mobile phone. The mobile phone may contain malicious programs. It is recommended to back up the phone address book, short messages, applications and other information on the computer. If the mobile phone doesn't have root, it is usually deleted because the software is loaded too much and the downloaded software contains advertisements or malicious code. For the sake of safety, it is suggested to back up the mobile phone data, restore the factory settings, then restore the backed-up data to the mobile phone, and download and install the software through the regular platform to check whether there are binding, advertising and other information.