A man get a sweet peck from a beautiful girl, then waits in agony for days for her call, set to a forlorn cover of The Nerves' "Hanging on the Telephone" by Cat Power. In the background the now defunct Cingular things-as-bars campaign is displayed almost subliminally.
I'll cop to being perhaps more sappy about this commercial than most—"Hanging on the Telephone" is one of my favorite songs—but there's something genuine about his obsession, despite the well-trodden subject matter, that gets me every time. To add to the sense of longing, the Cat Power cover was never released, as is rumored to have only been recorded in snippets for the commercial.
Of course, the stupid voiceover spoils it, but it's nice while it lasts. (And no, there's no reason I'm putting this up besides the fact that I think it is a notably competent ad.)
Bonus video: After the jump, The Nerves' original version.