These are just a few of the many Sprint PCS ads featuring the anonymous man in the black trenchcoat. First I'll include a YouTube playlist of ads, then some ads on TVSpots.tv, which I couldn't find on YouTube. (These ads inspired me to create a banner for The Adult Swim Message Board)
Playlist: "Cellular Town"; "Daughter"; "Dimple Monkey"; "Fast Talker"; "Girl Fight"; "Little Richard"; "Siegfried & Roy"; "Pillsbury Doughboy"; "200 Dachshunds"; "MIB worms"; "Shamu"; "Superheroine"; "Monster in the closet"; "Fetch"; "Charo"; "Flour the kids (with Jane Lynch)"; "Tornado"; "Big Day"; "Soap opera star"; "Richard Simmons"; "Monkey with a cold"; "Turkey"; "Stuck (Santa Claus)"; "Rachel Hunter"
TV Spots: "Braids", "Song for everything", "Wendy", "Panda Claus", "Telepathy", "Your new boyfriend".