Slide your finger in the direction of the number you want — always starting at 5, you can then go up and to the left for 1, or down and to the right for 9, and so on.
Press Menu to access your Phonebook. Press the Dial button to call.
Featured in the NY Times:
Replaced Run Button with double-tap to run
Added Video Chat capable contacts to phonebook
Added earcon to indicate when a phonebook contact is video chat capable
Added support for tapping on screen sides to scroll content