I can sent some files by bluetooth to other phones. But almost of the files can not be sent and the message "Unable to send copy right protected item" appear.
Can some one teach me how to remove that protection property or stop running protetion program
Sending file by bluetooth with 6670
The phone has a built-in list of file types, called a Closed Content List, that at least built-in applications, or applications using published programming interfaces cannot forward (send further through Bluetooth or MMS, etc.).
In some cases, it may be possible by renaming the file extension, but that may also require capability on the receiving end to rename it back.
Some applications may also do it through lower-level programming interfaces, and thus bypass this restriction.
In general, there is no way to simply turn it off for everything, because what governs it is part of the system and stored in unalterable ROM (Read-Only Memory).
If you want to read more about this in general or in detail, search for "closed content list" and/or "digital rights management" and/or "forward-lock" (or all of them) on, e.g., http://forum.nokia.com/