WhatsApp has a massive userbase across the globe and its parent company Facebook has been trying to make it even more feature rich and easy to use. The company has been reportedly testing a multi-device feature that will allow users to have the same WhatsApp account on multiple devices at the same time.

source https://gadgets.ndtv.com/apps/news/whatsapp-multi-device-feature-support-sighting-launch-beta-version-2-20-143-report-2220945