NJ was among many states that considered using a cell phone without a hands-free device a secondary offense. In other words, you were not supposed to be pulled over specifically for that.
Well, as of yesterday (March 1, 2008), New Jersey has changed the law so that using a cell phone without a hands-free device is a primary offense, in other words, you CAN be pulled over for it. We are one of 5 states with this restriction at this point, joining California, Connecticut, New York, and Washington.
If you get caught, according to the article linked below, there will be a $100 ticket issued.
I have mixed feelings on this. On one hand, it's a good thing that people aren't looking down and texting while driving, but on the other hand, is it the cell phone itself or the conversation that causes the distracted driving?
Article on NJ.com