Step 1: Install WhatsApp from Google Play Store and then register your primary number.
Step 2: If you already have a WhatsApp account running on your phone, skip step 1 and go to your phone’s setting.
Step 3: Navigate to Dual App/Clone app/App Twin and tap on it.
Step 4: You will now see a list of apps that can be cloned, tap on the WhatsApp option and then select install
Step 5: Set up the second WhatsApp account and open the secondary app.
Step 6: Now tap on Agree and Continue while also allowing WhatsApp to access your files as well as contacts.
Step 7: Now, you will be asked to register your contact number. Just remember to add your secondary number and then, you will be able to run dual WhatsApp accounts on one smartphone.