How to reset password - phone lock code in BlueBerry D285?

Hi there,

How to reset the phone lock code of Blue Berry D285 .. ? I've tried to do some guess but can't succeed. That code is needed for many stuff like restore factory and with it we can set some privacy as well.. I've just bought the mobile and dont know which code is set by default so need to reset it. If you can tell is there any specific code that is set by default, you can tell that code as well.

I'm also providing a link to that handset photo so you can help more, i know you may not need the photo but anyways here it is :

Your help will be very appreciated, thanks a lot!