Sorry If I couldn't understand properly to what you said.FYI, I only said that the Hidden Menu may or may not have been taken out from the ROM by some devs. Nothing more.
I was not refering to the "Update touch firmware" thing - which I still doubt has any purpose but to refresh / reload the touchscreen driver. It's not pulling anything new (in terms of drivers or something) from the Internet, so it's just refresh / reload...
Basically the reason i'm worried is that I was using stock ZVD and the hidden menu was working(although no update touch firmware option) after then I installed TWRP from AutoRec and it broke the knock code/knock on and knock off feature. Then I flashed Dorimanx kernel 8.5(latest stable)
So, what I can presume: Either AutoRec( for installing TWRP) or DorimanX kernel is the reason now I'm getting "Null" when I'm dialing 5689#*980#.