As so many people complaint, tv volume only changes 1 or 2 numbers with the remote. I took the suggestion from Sum Sang pairing the controller, unplug it, take the batteries out but all only worked a day or one time. Samsung also suggested to re connect wifi so I tried. Now the remote is not showing the keyboard so I can not put password for the wifi.
Here is the s/n : <HIDDEN>
Hope you can do something about it. Otherwise we will get a new TV but will never be Samsung.