Sony Ericsson was the mobile phone brand formed by the Sony and Ericsson joint venture, and its handsets were everywhere in the 2000s before the company became Sony Mobile. Each phone shipped with a set of built-in system sounds, including a short 'Greeting' tone stored in the device's sound menu. Clips like this one now circulate online as nostalgia audio, shared by people who grew up with these phones and reused by creators who want an instantly recognisable retro tech cue without needing any dialogue.