Disabling hardware capacitive buttons and enable On Screen Nav Bar

Initial information:

1.     Device and ROM used: 

• Redmi Note 4g running on AICP Marshmallow based ROM.
• MI3 running on AOSP (Kitkat or Lolipop)

Some Pre Requisites: 

1.     You need a Rooted device.

2.     You need Solid Explorer or any other Root Explorer

To enable on- screen Nav Bar:

1.     Open Solid Explorer Pro.

2.     Go to System and open build prop. (Make sure to take a backup by creating two copies and renaming one to build.prop.bak)

3.     Add the following line at the end of build.prop "qemu.hw.mainkeys=0"

     4. Save build.prop and reboot or you can complete the remaining steps and reboot.

To Disable Hardware Capacitive Keys:

1.     Go to system/usr/keylayout and open atmel-maxtouch.  

2.     Open it with any text editor

3.     In the end of the File there will be following Lines:

key 139        MENU     VIRTUAL

key 102        HOME     VIRTUAL

key 158        BACK       VIRTUAL

4.     Add # before each line so it becomes

#key 139        MENU     VIRTUAL

#key 102        HOME     VIRTUAL

#key 158        BACK       VIRTUAL

5.     Save and Exit.

6.     Finally Reboot your phone.

To disable the capacitive button lights especially in Lollipop Rom

·         Download Capacitive Buttons from Play STORE

·         Select the option which says no brightness.