How to Enable Soft Keys (Navigation Bar) on any Android Phone (4.0+)

How to Enable Soft Keys
(Navigation Bar) on any Android
Phone (4.0+)
Posted by AY PIZZY

Soft Keys were
introduced in android with the first Android
4.0 (aka Ice Cream Sandwich) device, the
Galaxy Nexus. The Galaxy Nexus did not
feature any hardware buttons below the
screen. It had only three hardware buttons
viz. power and the volume rocker buttons.
Even though the soft keys were introduced
about three years back, most of the current
devices running on Android 4.0 and above,
come with hardware buttons and soft keys are
disabled on them by default. But the soft
keys or the navigation bar can be enabled
easily by following the below steps.
[alert-warning]Before proceeding, you must
know that following this procedure may
render your phone inoperable (bricked
state). This happens very rarely. Neither we
nor the developer will be held responsible
for any damage caused to your device in any
case.[/alert-warning]

How to Enable Soft Keys:

Section 1: Pre-requisites
You need to have root access on your
device.

Download and install Root Explorer or ES File Explorer
(Download es file explorer here>>es explorer download
or any file manager with which you can
access the system partition. Below steps
are given for Root Explorer.
Make sure your device is at least 70%
charged to avoid complications during the
process.

Section 2: Procedure
Open your preferred file manager

I'll explain it separately
1:ES FILE EXPLORER
Open your ES FILE EXPLORER 
Click this (/) sign at the left side.
Scroll down....you will see a folder named system
Open the folder....inside the folder, scroll down....u'll see something like build.prop,open it, use es note editor to open it...click the uper right side corner at the top and click edit....inside the build.prop,scroll down to the last word move the blinking cursor to the front of the last word, press enter once on your keyboard,add this word to it at the end:

qemu.hw.mainkeys=0
(Its gonna be just like that coz its very important that their must be a space from the last word and the word you copied)
Press back and click yes.
Restart your device
2:with root explorer

mount the system partition as read-write
in stead of read only. Grant superuser
access when it prompts.
Go to the system folder present in the
root of file system. i.e the path- /
system
Now open the file,goto system,goto “build.prop” in any
Text Editor. For Root Explorer users,
long click on “build.prop” file and tap
on “Open with Text Editor”. (Before
editing this file, for a safety, copy
this file to the external memory card and
save as a backup.)
Now add the following line to this file
at the end:

qemu.hw.mainkeys=0
Save and Exit.
Now reboot your device.
Voila! You now have soft keys on your
device!
If soft keys are still not enabled, please
check if you have typed in the exact line
as above. There are some apps which do this
for you with a single click. But these apps
may cause boot loops. Happy Androiding!