The name comes from the Redmi 13C, a Xiaomi Redmi smartphone, and clips named for a phone model usually circulate as its ringtone, startup tone or notification sound shared between owners. As short phone sounds moved into meme editing, this one spread through soundboards and short videos where a recognisable mobile tune is needed instantly. It stays in use because almost every viewer knows the language of ringtones, so creators can mark a call, a message or a new device reveal with one short musical cue and no dialogue.