WhatsApp is rolling out a new contact storing update where users can privately add and manage contacts through the app, rather than relying on a mobile device. Contacts have previously been stored on a mobile device and then added to the instant messaging service by typing in the mobile number or scanning a QR code. If the original mobile phone became lost, the WhatsApp contacts would be gone with it. Now though, users can add and manage contacts directly from WhatsApp Web and Windows.