Update Galaxy S3 I9300 to UBBLG5 Android 4.0.4 ICS Official Firmware

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Samsung Galaxy S3 I9300 firmwares are now available online. We have covered a number of official firmware tutorials. All these firmwares are usually stock Android 4.0.4 firmware updates released at different countries (and regions). Today, we have Android 4.0.4 UBBLG5 for Galaxy S3 I9300.

This latest I9300UBBLG5 was released by Samsung over KIES for Ecuador. The modem build is ECOBLG3 and the firmware build date is 1st August 2012. This tutorial will guide you how to install Android 4.0.4 UBBLG5 on Galaxy S3. Let’s proceed with the tutorial now.

Samsung Galaxy S III - Pebble Blue

Disclaimer: All the tools, mods or ROMs mentioned below belong to their respective owners/developers. We (TeamAndroid.com) or the developers are not to be held responsible if you damage or brick your device. We don’t have you on gun point to try out this tutorial ;-)

Android 4.0.4 UBBLG5 Firmware Details:

PDA: I9300UBBLG5
CSC: I9300ECOBLG3
Version: 4.0.4
Date: 2012-08-01
Regions: Brazil

Make sure you have installed all your USB drivers for the Samsung Galaxy S III to connect it with the computer. Download Samsung Galaxy S3 USB drivers! Apart from just the USB drivers, there are a few more things that you need to take care of.

1. You need to enable USB debugging mode. This helps to connect your Android phone with the PC. See here: How to Enable USB Debugging.

2. Your phone battery should be 80-85% charged. If your phone goes off suddenly because of battery, during flashing ROMs or installing mods and updates — your phone might go dead permanently. See here: How to Check Battery Percentage.

3. Backup all your important data that you might need as soon as your flash a new ROM, or make a backup for just in case, you never know when anything might go wrong. See below on how to backup data:

Data can also be backed up using Samsung KIES for their devices, but if you backup data manually, you get more options what top choose from and it is very easy to move data across Android devices from different manufacturers, i.e moving Samsung Galaxy Note backup data to HTC One X.

4. Your phone should be factory unlocked. Additional instructions for locked Android devices will be added in the tutorial for unlocking devices.

Now, let’s proceed with the tutorial on the next page and update Galaxy S3 I9300 to Android 4.0.4 UBBLG5 firmware.