Slide to unlock was the signature gesture on the original iPhone, launched in 2007, letting users swipe across the bottom of the screen to open the device. The accompanying sound became part of that ritual, heard millions of times a day during the early smartphone era. Apple later replaced the gesture with pressing the Home button and then Face ID, but the old click and swipe survived online as a nostalgic shorthand. Creators now reuse it to evoke early iPhones, retro tech and the moment before a reveal.