Apple used a short slide and click sound for unlocking iPhones throughout the late 2000s and early 2010s, a period covered by this compilation from 2009 to 2016. As older iPhones were replaced and later iOS versions changed the lock screen, the sound disappeared from daily use and became a marker of that era. It now circulates online as a nostalgia clip, reused by creators who want an instantly recognisable cue for old Apple phones, retro tech and early smartphone culture.