I have a Samsung phone that has two SIMs installed. SIM 1 is for my private phone number and SIM 2 is my Business phone number.
I downloaded Whatsapp Messenger to the phone to use SIM 1 which is the personal Whatsapp version.
Initially, I had activated the “Dual Messenger” function on my phone, which installed a second copy of Whatsapp Messenger which I then connected to the second SIM. The second SIM is for our business.
You can see the second copy of the app which is installed by Dual Messenger, which has an orange bottom right corner with two white circles as shown below.
Now I wanted to convert the second Whatsapp Messenger to a Whatsapp Business account.
What I had to do was firstly back up the Whatsapp messages from SIM 2 .
Then download Whatsapp Business from the Google Play Store.
Next is to install Whatsapp Business which you activate using the SIM 2 phone number.
During the installation you can restore the Chats that you just backed up.
Now when you open the new Whatsapp Business, you will see the Chats and you can start using this newly installed Whatsapp Business app.
Because you are stealing the activation for the Whatsapp Business app from the Dual Messenger SIM 2 Whatsapp Messenger, you’ll get a notification that the Whatsapp SIM 2 app is not activated.
Simply uninstall the old Whatsapp Messenger from the phone by long touching the icon on your screen that looks like the picture below. You will see a pop-up menu appear and then click the “Uninstall” option.
Warning: do not uninstall the old Whatsap Messenger until you confirm that the new Whatsapp Business verion is fully working with all of your old messages showing on the screen.