Jack Dorsey has introduced Bitchat, a messaging application that operates over Bluetooth mesh networks, eliminating the need for the internet, servers, SIM cards, phone numbers, or email addresses. Bitchat is currently in beta on TestFlight and facilitates encrypted, peer-to-peer communication between nearby devices. Features include one-on-one encrypted chats, optional group messaging with password protection, searchable messages using hashtags, and store and forward functionality for delayed message delivery. Future versions will incorporate WiFi Direct technology to enhance communication speed and range.