Thank you.
Yesterday I heard him trying to make voice on cell phone.
He replied me by hummmmmm , hummmmmm, hummmmm.
Many times.
Thanks God .This is a great news in history of Persistent Vegetative.
I have sent one friend of my deceased son Ubaid Pasha at his home and he made a video of him . Hope I will be able to produce that soon. (before this voice improvement)