Signal’s chat migration feature is currently only available through the beta v5.5.0.
In a report by TestingCatalog, Signal has now introduced an easier and safer way to migrate chats from your old Android device to your new one in the beta v5.5.0. To migrate contacts, head over to Settings > Chats > Transfer Account, where a new screen appears that guides the user with the migration process. The process of migrating from your old device to the new one can be done over a local Wi-Fi Direct connection.
Like WhatsApp, Signal also allows users to chat using a PC or laptop. But unlike WhatsApp, Signal’s use on the computer is limited to its desktop client. The desktop client requires at least 64-bit Windows 7, macOS 10.10, or 64-bit Linux distributions supporting APT, such as Ubuntu or Debian.