I just opened the Whatsapp web app (never used it before), and then immediately set Airplane Mode on my phone as soon as it scanned the QR code.<p>WhatsApp managed to load all my conversations (I don&#x27;t have many) and the most recent message, for display in the list-view. But each conversation only has the most recently sent message. After a while I got a &quot;Phone Not Connected&quot; message. Seems like it really is only stored on your phone.