Samsung Galaxy Ace 2 with model number GT-I8160 has received the latest Android 4.2.2 Jelly Bean update with firmware build number I8160XXNB1. The new official update is now available as an Over-The-Air (OTA) update as well as through Samsung KIES.
Firmware details
PDA: I8160XXNB1
CSC: I8160OXXNB4
MODEM: I8160XXNB1
Version: Android 4.1.2
Build date: Feb 10, 2014
Regions: Slovakia, Cyprus, Germany, Hungary, Nordic countries
Samsung Galaxy Ace 2 I8160 users who missed the OTA update notification or unable to access the update over Samsung KIES, can now download and install the same manually using our step-by-step guide.
Pre-requisites
1. Install USB Drivers for Samsung Galaxy Ace 2 on the computer.
2. Enable USB Debugging Mode on the phone by navigating to Settings >> Developer Options.
3. Make a backup of all your important data before following the guide.
4. Ensure the battery of the phone is charged more than 80 percent.
5. The Android 4.1.2 XXNB1 Jelly Bean firmware is compatible only with Samsung Galaxy Ace 2 (GT-I8160). Applying this to any incorrect variant might brick the device. Verify the model number of the Galaxy Ace 2 by navigating to Settings >> About Phone.
 Files Required

 1. Android 4.1.2 XXNB1 Jelly Bean Firmware (Mirror Link) for Galaxy Ace 2 I8160

Slovakia: I8160XXNB1_I8160TMSNB1_TMS.zip
Poland: I8160XXNB1_I8160OXXNB4_XEO.zip
Romania (Cosmote): I8160XXNB1_I8160COANC1_COA.zip
Germany (1 & 1): I8160XXNB1_I8160XEGNC1_XEG.zip
Austria (T-Mobile): I8160XXNB1_I8160MAXNB1_MAX.zip
Hungary (T-Mobile): I8160XXNB1_I8160TMHNC1_TMH.zip
Austria (Telering): I8160XXNB1_I8160TRGNB1_TRG.zip
Poland (T-Mobile): I8160XXNB1_I8160TPLNB1_TPL.zip
Open Austria: I8160XXNB1_I8160ATONB2_ATO.zip
Hungary (Telenor): I8160XXNB1_I8160PANNB1_PAN.zip
Baltic: I8160XXNB1_I8160OXXNB4_SEB.zip
Cyprus (Cytamobile Vodafone): I8160XXNB1_I8160OXXNB4_CYO.zip
Slovakia: I8160XXNB1_I8160OXXNB4_XSK.zip
Germany: I8160XXNB1_I8160OXXNB4_DBT.zip
Nordic Countries/Finland: I8160XXNB1_I8160OXXNB4_NEE.zip
Hungary: I8160XXNB1_I8160OXXNB4_XEH.zip
2. Odin 3.07
Steps to Update Galaxy Ace 2 I8160 with Android 4.1.2 XXNB1 Jelly Bean Firmware
Step 1: Extract Firmware zip file using WinRAR/7-Zip/WinZip or any other extracting tool, you will get a .tar.md5 file and some other files (optional).
Step 2: Extract Odin zip file and you will get Odin3 v3.07.exe along with few other files.
Step 3: Switch off the Galaxy Ace 2.
Step 4: Boot the device into Download Mode by pressing and holding Volume Down, Home and Power buttons together until a construction Android robot icon with a warning triangle appears on Lcd. Now press the Volume Up button to enter Download Mode.
Step 5: Run Odin on the computer as an Administrator.
Step 6: Connect the Galaxy Ace 2 to the computer using USB cable while it is in the Download Mode. Wait until Odin detects the device. When the device is connected successfully, the ID: COM box will turn to light blue with the COM port number. Additionally, the successful connected will be indicated by a message saying Added.
Step 7: Select the following files in Odin from extracted I8160XXNB1 firmware folder:

• Click the PDA button and select the .tar.md5 file.
• Click the Phone button and select file with MODEM in its name. Ignore if there is no such file.
• Click the CSC button and select file with CSC in its name. Ignore if there is no such file.
• Click the PIT button and select the .pit file. Ignore if there is no such file.

Step 8: In Odin, enable Auto Reboot and F. Reset Time checkboxes. Also, ensure the Re-Partition checkbox is chosen only if a .pit file was chosen in the previous step.
Step 9: Verify everything suggested in Step 7 and Step 8 is done correctly. Then hit the Start button to begin the installation process.
Step 10: Once the installation process is completed, your phone will restart and soon you will see a PASS message with green background in the left-most box at the very top of the Odin. You can now unplug the USB cable to disconnect your device from the computer.
Samsung Galaxy Ace 2 I8160 should be now updated with official Android 4.1.2 XXNB1 Jelly Bean. Head over to Settings >> About Phone to verify the software version running on the device.
Note: If Galaxy Ace 2 I8160 stuck at booting animation after Step 10 then go to recovery mode (press and hold the Volume Up, Home and Power buttons together) and perform Wipe data/Factory Reset and Wipe Cache Partition task before selecting reboot system now function. In recovery mode use Volume keys to navigate between options and Power key to select the option. Please note, performing wiping task will erase your device internal memory data and not external SD card data.