[Dave L]

I am going off of a 6080 so this might not directly translate but it should be very very similar as they are both series 40 devices.

From the menu go into your contacts folder then names.
from there select "options" then "copy"
select "from phone to sim card"

The only thing to keep in mind is that the sim card can only have one entry per name so if you have a persons name and 3 different numbers on the phone it will show up as "persons name, persons name1, persons name2 on the sim card. The phone can only carry 200 contacts and I belive the SIM is 250 so you should be fine.