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It can lock a whole folder. The application starts in last folder and get the password only at the begin. FileLock is a security JAVA mobile application that can restrict access to files and folders: lock files, and folders, hide files and folders to make them completely invisible; or password protect files and folders.
Compatible Phones
Most J2ME phones with java support.
Tested Works: Nokia 6630, sonyericsson K750, sonyericsson K800i
Download
FileLock v1.0