Device Guides
Apple iPhone 4S
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iOS is the operating system software installed on your iPhone. To find out which version you have: Tap Settings, Tap General, Tap About, and view the version number.

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Search in Apple iPhone 4S
How to
Importing contacts from my SIM to my mobile phone
If you change your SIM and would like to keep contacts saved on the SIM, you can import your contacts to your mobile phone address book. as it saves you from keying in all the information again.
Tap Settings.
Tap Mail, Contacts, Calendars.
Tap Import SIM Contacts.
Tap the Home key to return to the home screen.