I believe the research that says hand texting is not safer than hands free.  That both are equivalent to drunk driving in their effect on the driver, no matter what they believe about their ability to 'multi-task'.

Those are University studies with no axes to grind that I can see.

And no one needs to be chatting on the phone about anything if it causes unnecessary risk of death or physical injury to anyone.    

Pull over if it is important enough to talk about.  

That's what I do and my car has built-in hands free that works on all the phones we have programmed into it.