To dial a number in the Recent tab

From the Recent tab, tap the Call icon
at the right of the call entry.
From the Recent tab, tap the image to the left of the call entry to view other information saved in your phone’s memory for that contact. Tap a phone number to dial it.

TIP	To insert an area code when you're traveling, touch and hold the entry, then tap Copy number in the context menu. Change to the Dial tab, touch and hold the phone number field, tap PASTE, then edit the number as necessary before tapping the Call button .