Android 4.0.4 XXLQB was released a few days ago for the Galaxy S2 I9100 and at that moment, it was not possible to root. But XXLQB root is now available with full instructions, thanks to a custom kernel. You can easily root XXLQB Android 4.0.4 ICS on Galaxy S2 I9100 using the tutorial given below. We will use SiyahKernel v4.0.
As you continue reading below, we will guide you through the entire process of how to root the official software update Android 4.0.4 XXLQB ICS on Galaxy S2 I9100 using ODIN. Remember, this tutorial is only for XXLQB Android 4.0.4. Go to Settings > About phone to verify what build you have. Please make sure you backup all your apps and personal data as this tutorial will wipe all your data. Let’s continue with the tutorial below.
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 😉
This root method tutorial is only for the official stock firmware. Custom firmwares are usually pre-rooted but even if you need to root any, flash SiyahKernel using ClockworkMod recovery.
Make sure you have installed all your USB drivers for the Samsung Galaxy S II 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:
- Backup your SMS messages. How? –> How to Backup/Restore SMS Messages.
- Backup Contacts, Gmail and Google Data. How? –> Sync with Google Sync.
- Backup Call History. How? –> How to Backup Call History.
- Backup WhatsApp Messages. How? –> How to Backup/Restore WhatsApp Messages.
- Backup APN Settings: GPRS, 3G, MMS Settings.
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 root Galaxy S2 I9100 on Android 4.0.4 XXLQB ICS official stock firmware.