Quickly Adding New Contacts from your Phone Recents List

Many times you will receive a phone call from, or place a call to, someone you would like to add to your Contacts list.  It is easy to add that phone number to an existing contact or create a new contact from a phone number.
1. Tap the Phone icon.

2. Tap the Recents soft key along the bottom.
3. TIP: Any phone number you see listed is not yet in your Contacts list.  You see names instead of phone numbers when they are already in your Contacts list.
4. Tap the blue arrow  at the right edge of the phone number to see the Info screen shown to the right.
5. Scroll down and tap Create New Contact or Add to Existing Contact.

Source: Chapter 10: Your iPhone as a Phone,