I'm looking for a name of a movie. A guy is showing something on his phone to another guy when a girl walks into the room. The guy takes the phone and stomps the phone on the ground. Anyone know the name of this movie?

I think you might be looking for The Best Man Holiday... I knew I had seen something like what you were describing on a commercial, but had a heck of a time finding a clip for some reason, sorry it took so long, and I hope this is what you're looking for! (at 8 seconds he throws the phone, (doesn't stomp it... ))
Watch "Terrence Howard On The 'Phone' Scene From The Best Man Holiday" Video at Vibe (http://video.vibe.com/video/Terrence-Howard-On-The-Phone-Sc)