If was a known fact that Samsung was testing out (http://www.gsmarena.com/samsung_starts_testing_jelly_bean_firmwares_for_galaxy_ace_2-news-5519.php) the Jelly Bean firmware for its Galaxy Ace 2 smartphone and the leaked firmware (http://blog.gsmarena.com/samsung-galaxy-ace-2-android-4-1-2-jelly-bean-firmware-leaks-as-reported-earlier-samsung-had-started-testing-out-the-jelly-bean-firmware-for-its-galaxy-ace-2-smartphones-and-now-the-test-firmware-for/) had confirmed that the official rollout was just around the corner. Now, Samsung has officially announced that the first phase of the update is in progress.
(http://cdn.gsmarena.com/vv/newsimg/13/04/galaxy-ace-2-jb/gsmarena_001.jpg)
The Android 4.1.2 (build JZO54K) Jelly Bean update for Galaxy Ace 2 (http://www.gsmarena.com/samsung_galaxy_ace_2_i8160-4559.php) comes with the improved notifications, performance, battery life and a new TouchWiz. The update is currently rolling out in Portugal and is available through Samsung KIES and Over-the-Air (OTA).
Unfortunately, there is no official confirmation on what regions will follow and how long it will take for the update to go global.
Source (http://www.sammobile.com/2013/04/01/official-android-4-1-2-jelly-bean-update-for-the-galaxy-ace-2-has-arrived/)
Alternative Source