It seems that WhatsApp might be getting a much sought after upgrade in the near future that'll offer support for more than one phone - in fact, up to four devices might be supported.
According to a report by WABetaInfo, WhatsApp has been working on the feature for ages, but it's taking a heck of a time because of how much new work needs to be done to allow it.
Still, the images in its post suggest that the process for adding a new device and downloading your message history to that device is in place now.
Traditionally WhatsApp has always required a phone number in order to be linked to your device. If you move to a new phone you'd be fine if you kept the same number, but otherwise, you'd have to start from scratch.
Then you have the hassle of letting all of your contacts know what's happened. Similarly, if you're juggling two phones already - a work and personal phone for example - then you also can't run WhatsApp comfortably and easily.
With any luck, that's not only set to change but you'll also have the power to manage and control the extra devices too.
The linked device functionality will seemingly allow users to control all the connected devices in much the same way you can at the moment when using WhatsApp on web and desktop, except without the need for your main phone to always have an internet connection in the background.
Recent beta changes also seem to suggest there may be support for macOS machines as well. These updates are clearly a work in progress and there's no guarantee they'll become a reality or when it would happen, but it's still interesting to see WhatsApp trying to roll out such user-friendly changes.