To dial a number in the Call Logs tab

From the Call Logs tab, tap the Call Key at the right of the call entry.
From the Call Logs tab, tap the image to the left of the call entry to view all of the contact's numbers saved in your phone’s memory. Tap a phone number to dial it.

TIP!

You can edit a phone number in the Call Logs tab before you place the call (e.g., to insert an area code when you're traveling). Touch and hold the entry, then tap Edit number before call in the Context menu. Edit the number as necessary, then tap the Call Key on the keypad.