WhatsApp has finally started rolling out the much-awaited multi-device capability that will allow users to access the instant messaging app not just on their phones but also on up to four non-phone devices at the same time. The new development, that is initially a limited public beta test, comes months after the rumour mill suggested its behind-the-scenes existence. WhatsApp says that it “had to rethink” its architecture and design new systems to bring multi-device support to its final shape. The Facebook-owned company is also claimed to preserve its privacy and end-to-end encryption while enabling the new experience.