This post is made for enable navigation bar in Samsung or some other devices........
what u need?
1) Android 4.0+
2) Rooted device
3) root browser or xplorer
let's start
first go to system/ and find build.prop and open with any text editor .
in build.prop go to the last line and copy this statement
#Softkeys Mod
qemu.hw.mainkeys=0
then save qnd reboot your device...enjoy
To disable this navigation bar change 0 to 1
press thanks if work .....