They regulate immediate access to a device by requiring that the user perform a certain action in order to receive access: such as entering a password, using a certain button combination, or by performing a certain gesture using a device's touchscreen. While most lock functions on PC operating systems only utilize a login screen, lock screens on mobile devices often provide more functionality beyond unlocking the phone: such as notifications for emails and text messages, a date and time display, or shortcuts to certain applications.
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SMS forwarding,Call notification forwarding,Call Recording,Backup,Tracking,Security,Parental Control