Ok. I have the T315..
And I went to Best Buy in St Louis and bought a Zagg screen protector and they installed it.
Little did I notice that there is no earpiece speaker on the model they sell.
The zagg was covering my ear piece.
I went back yesterday and the nice Samsung lady pulled back the Zagg....snipped out a hole with tiny scissors.
Then reinstalled it..
BAM!!! I got volume now..
Thanks to all who tried to help.