I tweaked an isync plugin, to get my adresses to my samsung b2700.
Should work with isync 3.x.
You can download it
here.
1) Create a folder named 'PhonePlugins' @ User/Library/ if it is not yet existing.
2) Back up your data ;-)
3) Drop the Plugin into it.
4) Launch isync and add the B2700.
I can't take any responsibility for loosing data. Be careful the Plugin is definately NOT thoroughly tested.