Suggestions
The Good:
Graphics were decent and looked realistic. Transitions were clean. Animation was decent and convincing, but as the author stated it was for a class learning flash. (Hope you got a good grade)
The Bad:
The art style on the bus seemed rather realistic, but this clashed with the concentric circles emanating from the wireless doohickey. It was difficult to see what he was doing or tell what it was in his hands, which may have been the point of the circles, but a close up of his hands texting the message would do better as it can be clearly seen what he's doing, and reinforce that the two are communicating but not face-to-face.
At the end when she jumps on him the animation seemed cheesy, not that I could do better, but if your looking for somewhere to improve, that's one of them.
The vote:
2 - Nothing I'd suggest to my friends, but worth keeping on newgrounds for the random reviewer, and possibly to host it for you to use in a portfolio.