// open the default address book.
ABAddressBookRef m_addressbook = ABAddressBookCreate();
if (!m_addressbook) { 
    NSLog(@"opening address book"); 
}

//get people and index
CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople(m_addressbook);
CFIndex nPeople = ABAddressBookGetPersonCount(m_addressbook);

//iterate on each person
for (int i=0;i < nPeople;i++) {
    ABRecordRef ref = CFArrayGetValueAtIndex(allPeople,i);

    //get phone numbers and names
    ABMultiValueRef phoneNumberProperty = ABRecordCopyValue(ref, kABPersonPhoneProperty);
    NSArray* phoneNumbers = (NSArray*)ABMultiValueCopyArrayOfAllValues(phoneNumberProperty);
    NSString* name = (NSString*)ABRecordCopyValue(ref, kABPersonFirstNameProperty);
    CFRelease(phoneNumberProperty);

    //Loop to display results
    NSLog(@"Name = %@", name);
    NSLog(@"Phone numbers = ");
    for (int j=0; j<[phoneNumbers count]; j++) { 
        NSLog(@" phone -> %@", [phoneNumbers objectAtIndex:j]); 
    }

    //release memory
    [phoneNumbers release];
}