can it also work with mac not only with PC?
You can do OBEX file transfer over Bluetooth with a Mac.
There is no Nokia PC Suite for the Mac, but you could ask Apple whether their latest iSynv supports the 6670 (or 7610 or 6260; if any of these work, then the 6670 should, too).
what is obex?explain in brief
what i can not do without nokia PC suite?