Recently found an interesting app, Knox by Samsung. It help you to securely separate your personal and professional data.
For the meantime I am not quite interest in its security feature, however it does provide me an opportunity to install two Whatsapp on the same device.
The app creates a new 'layer' on your phone so that you as a device user can have a 'second' phone within your phone.
As it is being treated as another phone, like vm, you need to install a separate set of apps inside. And this is the feature that allow you to install a 'second' version of Whatsapp in the same device, like a vm inside your phone.
