HELP PLEASE how can i unlock my BB

Is this a new BlackBerry or had you previously used it.
Have you used any third party software on it?

This blackberry is used.

PIN: 0 could indicate that the BlackBerry has been tampered with.
If you enter the password 10 times, it will erase itself.
If the BB was tampered with or obtained improperly, you may not be able to do much with it.

have now typed 10 times, but nothing happened