You can link more devices with one phone number on Signal now, including an Android phone or iPhone. Signal already supported linking PCs and iPads, but not additional phones. When you link a device on Signal, you can check and respond to new messages across all of your linked devices. You can also choose whether or not to transfer an end-to-end encrypted copy of your previous messages to each newly linked device to mitigate the risk of devices that might be shared, lost, or compromised.
The update is rolling out now with Signal version 8.20 on Android and version 8.22 for iPhone / iPad.
Signal also says it has made “significant interface improvements to better support large devices,” including several improvements for foldable phones, which helped enable support for Android tablets. However, Signal says the large-screen version of its Android app is “still a work in progress,” and that it’s working on optimizing the interface for its Chromebook app, as well.