yeah, but only on an empty highway when my passenger can take care of answering the phone. i use earphones and inform the other person that i am driving and might tune them out to pay attention.
i also talk on my cell phone when cycling. i pull over to answer, put my earphones in, then bike around slowly. i figure it’s ok since i am only going to kill myself if it distracts me.
i NEVER talk on the phone in the city. i’ll pull over and talk if i think i need to take the call.