You can copy contacts between the SIM card and your iphone 4S. This is useful if you change the phone, as it saves you from keying in all the information again.
Follow these instructions to copy contacts between the SIM card and your Apple iPhone 4S.
- Find Mail, Contacts, Calendars
Press Mail, Contacts, Calendars
- Copy contacts between SIM card and phone
Press Import SIM Contacts
Press the Home key to return to standby mode