Unable to synchronize contacts using my Mac and my phone C2-03. Checked on the website there is no support for C2 series on Mac iSync.
Interestingly even http://www.mactomster.de/isync/isync-en/ do not list a Plug-in for this device, so perhaps it is not feasible; it might be worth getting in touch with them for their response!
I tried the nokia_c2-00.dmg plug-in. It is *buggy*! I'm trying to restore my iCalender now. (Many duplicates of calender entries.)
Exist C2-00 plugin, named "nokia_c2-00.dmg", size 221К; if its help - you can google it, or i can to try send myown copy :-)