Jelly bean 4.1.2 for Galaxy Ace 2, GT-I8160

#Update : Official update Jellybean 4.1.2 for Galaxy ACE 2 I8160

Download : Torrent necessary files
After you download, the following is the instruction :

For whom want to know how to back up your phone content, sms and apps, here is useful article

Proceed carefully
1. Power phone off.
2. Press Volume down+Home+Power key to enter download mode.
3. Press volume up when prompted.
4. Make sure you have the drivers all installed and connect the phone to pc.