To copy contacts between your phone and SIM card, in the contacts list, select > Import/Export > Copy to > Phone or SIM Card.
You can also import contacts from your phone memory or a memory card. Select > Import/Export > Import from internal storage or Import from external storage.
To share a contact with a friend, select > Import/Export > Share visible contacts, then select the contact and > Done. Select to share the contact using either Bluetooth or Messaging.