What cell phone does Sam Witwicky use in Transformers 3: Dark of the Moon?

Unfortunately, I cannot find the picture of the phone, but for those who have seen the movie, what model is it?What cell phone does Sam Witwicky use in Transformers 3: Dark of the Moon?I think it was nokia x7What cell phone does Sam Witwicky use in Transformers 3: Dark of the Moon?i coulda sworn it was lg wp7 (its even called Optimus)