You can do this using any file manager for Android, though it is easier to do this from Windows.

The second step is to rename the /sdcard/WhatsApp directory to /sdcard/OGWhatsApp. The first step is to make a backup copy of all of your messages (if you want to save them) and then delete all of the user information for the app (or you can just reinstall the app) You just have to follow these three steps: It´s much easier to install OGWhatsApp than it might seem at first. Once you install OGWhatsApp on your Android device, the app allows you to use two different telephone numbers with WhatsApp from the same smartphone.