You can change your Contacts list to view an alphabetical directory for easy searching. The directory view displays only the letters of the alphabet (on the left side) that have entries stored under that letter. Corresponding to each letter is the number of entries that begin with the letter (on the right side).
Open the Contacts application.
Pinch in on the screen to change the view to the alphabetical directory view.
Tap a letter to display entries under that letter.