It focused on performance improvements designed to give the operating system a smoother and more responsive feel, improvements to the notification system allowing for expandable notifications with action buttons, and other internal changes. The first of these three releases, 4.1, was unveiled at Google's I/O developer conference in June 2012. Unsupported, Google Play Services support dropped since August 2021 Android 4.2 Jelly Bean running on a Nexus 4Ĥ.3.1_r2 (JLS36I) / Novem 9 years ago ( )
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