Once you install OGWhatsApp on your Android device, the app allows you to use two different telephone numbers with WhatsApp from the same smartphone.
What is OGWhatsApp??
OGWhatsapp is a modded version of Whatsapp messenger for Android devices.
It is used to use 2 whatsapp account in one single android device ie dual whatsapp account for whatsapp dual sim
OGWhatsapp doesn't require to ROOT your android device. [NO NEED OF ROOT]
Though this OGWhatsApp Anti-Update version is based on WhatsApp 2.12.67 it UI has Android 5.0 lollipop like material design. So download the OGWhatsApp Anti-update or Anti-ban version and enjoy having dual WhatsApp on a single Android phone.