They have the laws in place here, but as others have stated they aren't enforced. Shoot if you look often enough you will see the LEO with the cell phone to the ear while driving.
LEO are exempted from the law for two reasons. They go through extensive drivers training annually and are considered somewhat better drivers than the general population. However, many dept regulate this themselves.
Also, since everyone has scanners and our frequencies, these days, some sensitive work is done by phone and in-car computers. So, we have to use phones while driving.
I hate texting while driving no matter WHO does it. Our dept says no texting for us, too.