iphone 3g with tmobile.. how can i add contacts to my sim card?

4.0 on iphone 3g seems to be running EXTREMELY SLOW and im very disappointed. I read that if you restore your iphone as a new phone instead of BACKUP, it would increase the speed. i just want all my contacts.. how do i add all my iphone contacts into sim card without adding them one by one manually?
 
Back
Top