This alert comes from Apple's iPhone, where short notification tones tell users a message or app alert has arrived without needing to look at the screen. Because the iPhone became one of the most widely used phones in the world, its beep became instantly familiar far beyond Apple users, and soundboard creators began sharing it for videos, pranks and edits. Like a Discord notification or a simple ding sound effect, it now works as shorthand for an incoming message, which is why editors still reach for it whenever they need a quick, believable phone cue.