As of January 1, 2011, it is prohibited to "write, send or read a written communication" while driving. This includes text messages, instant messages, email, and further.
However, there is no State law or City ordinance prohibiting talking on cell phones while driving. For teens, the use of cell phones while driving is prohibited until completion of the six month period of passenger and late-night driver restrictions. Like any other distraction in a vehicle, proper care should be taken when using a cell phone while the vehicle is in motion.
Although officers will not stop someone for simply talking on the phone, motorists will be stopped for operating a vehicle in such a manner as to indicate a careless or heedless disregard for the rights or safety of others, or in such a manner as to endanger any person or property. The operation of a motor vehicle in this manner constitutes Careless Driving, which is a violation of City ordinance and State law.