If you've upgraded to a newer Samsung device or want to use WhatsApp on a more modern operating system, you can simply download the WhatsApp app from the Google Play Store (for Android devices) or the Samsung Galaxy Store.
You're looking for information related to WhatsApp on a Samsung B7330 Omnia Pro device. Here's what I found: whatsapp jar file for mobile samsung B7330 omnia pro.rar
For older devices like the Samsung B7330 Omnia Pro, WhatsApp used to provide a Java-based version of their app, which could be installed using a JAR file. If you've upgraded to a newer Samsung device