WhatsApp has been working on support for usernames for a while, and a feature tracker has spotted signs of support for username-based calling, suggesting future updates may include this functionality. Unlike Signal, which already offers similar features, WhatsApp might introduce a unique element called a “username key,” which could offer better privacy and keep sp…WhatsApp has been working on support for usernames for a while, and a feature tracker has spotted signs of support for username-based calling, suggesting future updates may include this functionality. Unlike Signal, which already offers similar features, WhatsApp might introduce a unique element called a “username key,” which could offer better privacy and keep sp…