Episode is called "It's A Wonderful Lie" from season 4, episode 10

I can't tell you the episod Kofi... I don't recall which one it was :S

You know, I'm am avid Hoise fan. I've seen him with the mac but never with an iPhone as pictures above. That's real nice advertising for Apple.

"So cool, even Gregory House uses it!"

What episode is that from?