Tips & Tutorials

How to Update Galaxy S2 I9100 to XXLQ5 Android 4.0.4 Official Stock Firmware

IMPORTANT: There is a major bug in this firmware XXLQ5. Do NOT install this update on your Samsung Galaxy S II or if you have already installed, do NOT try to do a “Factory Data Reset”. Your Galaxy S II will get bricked! Flash this build ZCLPL instead to be safe from the bug.

Samsung Galaxy S II has been receiving the ICS update for quite a while now. Due to some reasons, there are reports of ICS for Galaxy S2 I9100 still not reaching many countries. While those countries wait for Android 4.0.3, Samsung has already started rolling out the Samsung Galaxy S2 Android 4.0.4 I9100XXLQ5 stock firmware and is now available for download.

Android 4.0.4 I9100XXLQ5 can be downloaded and installed on any Galaxy S2 just like how previous stock firmwares are installed. This latest stock firmware XXLQ5 is Europe based. It was built on 28th June 2012. A big thanks to SamMobile and Faryaab from XDA for this firmware!

Galaxy S2

Disclaimer: All the tools, mods or ROMs mentioned below belong to their respective owners/developers. We ( 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 😉

Samsung Galaxy S II Firmware Details:

Base Firmware: I9100XXLQ5 (4.0.4)
Region: Europe
Country Open Europe
Carrier: Unbranded
Build Date: 28 June 2012
Modem: XXLQ5
Change List: 753921

Make sure you have installed all your USB drivers for the Samsung Galaxy S I to connect it with the computer. Download Samsung Galaxy S2 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 your phone to the latest Galaxy S2 I9100 4.0.4 firmware.