Hi
Yea you heard me right, replace your android buttons..
Its actually possible to replace your android buttons with some app..

1.Back button (No Root)

Click here to download:

http://aff.giveawaycrew.com/d.php?p=69263&i=com.appspot.app58us.backkey&v=1.12

This app gives you almost all your soft keys(back,home,minimize menu, and status bar) except for one ...Guess(hmmm) your menu(option) key! , which is very necessary to change your whatsapp status or pictures and even access whatsapp settings ... But not to worry i got ya back, here

2.Visual menu (root )
Ohh no root is required.... But am sure you got that so here is an artificial menu(option) key..
Enjoy

click here to download:

https://download.apkpure.com/apk3/M00/03/9A/wGOTMFXwiOCAV8CFAAA_FeYCoWo688.apk?fn=Virtual%20Button%20ROOT%20MENU%20only_v2015.04.21_apkpure.com.apk&k=4ee0eb6095c9f55508d22602ba61800c56daecd4&p=jp.ne.neko.freewing.VirtualButtonRootMenu&c=1%7CTOOLS