Last quarter Facebook has added a bunch of new features to WhatsApp including QR code scanner for contacts and animated stickers. Now according to WAbetainfo Facebook is planning to add new multi-device support in WhatsApp.
Multi-device is a feature where users can access his/her account on multiple devices using the same number just like Telegram. Telegram has this feature for a long time. According to the source, users can have up to four devices for a single account. The new feature is called Linked Devices. This new feature allows users to add as well as delete the linked devices.