Zello is a free push-to-talk (PTT) app that turns your smartphone, tablet, or PC into a live walkie-talkie. Unlike traditional radios that rely on line-of-sight and expensive repeaters, Zello works anywhere you have a Wi-Fi or cellular data connection.
More troubling is the use of private Zello channels by fringe political groups. Due to Zello’s ephemeral nature (no permanent text log, voice messages that disappear), sovereign citizen movements and anti-lockdown protestors have utilized Australian-based channels for operational security. This has led to a cat-and-mouse game where law enforcement monitors public channels while extremists retreat to invite-only "closed nets." Unlike radio spectrum (governed by the ACMA), Zello operates in a legal grey zone regarding real-time voice moderation, leaving it vulnerable to coordinated harassment campaigns, often termed "frequency jamming" via voice spam. Zello Channels Australia