Siri debuted with the iPhone 4S alongside iOS 5 in October 2011, and its soft two-tone chime quickly became one of Apple's most recognisable audio cues. As Siri clips and parodies spread across YouTube and later TikTok, the tone detached from the phone itself and became shorthand for artificial intelligence answering a question. Creators still reach for it because it reads instantly as a minimalist ding sound effect for Apple nostalgia, signalling a smart reply without needing any visual of a phone.