A new firmware for Galaxy S3 Singapore devices is now available. The firmware update I9300XXEMA2 is now rolling out and is also available for download. So, if you have not received the update yet, you can download the package in zip format and flash it on your device using Odin. Here are the details and the download links:
Version: Android 4.1.2 Jelly Bean
Regions: Austria, Belgium, France, Germany, Hungary, Italy, Spain, United Kingdom
Download I9300 XXEMA2 Firmware [Singapore]
How to Install Jelly Bean 4.1.2 XXEMA2 on Galaxy S3 I9300
After downloading, you can install XXEMA2 firmware on your device using Odin.
Step 1: Unzip the downloaded zip file.
Step 2: Download Odin3_v3.04 and launch the Odin3_v3.04.exe file.
Step 3: Put your Galaxy S3 in download mode.
Step 4: Connect your phone to the computer.
Step 5: In Odin, click on PDA button and select the .tar.md5 file that you extracted from firmware zip package.
Step 6: Click “Start” button in Odin.
The firmware installation will begin. Wait till it completes. Once your phone boots up, you will have the I9300XXEMA2 installed on your device. Enjoy!
For a more detailed guide: How to install stock ROM using Odin.