After that, you will use your mobile phone number to get verified (keep in mind that WhatsApp uses your mobile phone number as ID) and once you get verified, you will be able to start using the application without any trouble. When the installation is complete, you will see the WhatsApp welcome screen and you will need to agree with the terms. Once you find the WhatsApp application, you will just need to tap on it to select and start downloading and installing it on your device. To do this, you will just need to head to the Windows App Store and tap on the search button (magnifying glass), write WhatsApp and start searching for the application. The most used and easiest method to install the application is via the Windows App Store. However, there are two ways to install this application on one of the phones mentioned above. Installing WhatsApp on Nokia Lumia 510, 520, 535 and 630 can be quite easy.