WhatsApp seems to be experimenting with multi-phone and tablet conversation.

According to a screen uncovered in a beta version of WhatsApp by the site WABetaInfo, WhatsApp is working on a feature that would allow users to talk with the same account on several phones or on a phone and a tablet. The page instructs you to register the device you're using as a "companion" by scanning a code with your primary phone, however there doesn't seem to be one to scan right now.

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A screen from a previous test revealed that, despite being end-to-end encrypted, smartphones may soon be able to sync recent communications. This screen, when paired with the "Register Device as Companion" page, which informs users on how to use WhatsApp on a different device, provides solid proof that this functionality is in the works.

Both displays were discovered on the Android version of the app, implying that the feature would allow users to talk on a second phone or tablet. It's unknown at this time if the functionality will be accessible on iOS when it comes, though precedence suggests it will. WhatsApp's Linked Devices functionality already allows you to use your account on various devices, however it currently only supports PCs as secondary devices. Both iOS and Android users may use the function.

In November 2021, WhatsApp released Linked Devices as a public beta, and it has since been upgraded (though there are still a few unsupported features, depending on what your main device is). However, although Linked Devices is useful for desktop users, it is ineffective for people who have additional smartphones or tablets. The Verge reached out to Meta, WhatsApp's parent company, for further information on its intentions to extend the Linked Devices functionality to include mobile devices as well.