Tips & Tutorials

Update Galaxy S2 I9100 to XXLSJ 4.1.2 Chameleon Jelly Bean Custom ROM

Chameleon ROM for the Galaxy S2 I9100 brings the stability and features of a stock Samsung firmware with the style and elegance of a AOSP ROM. It is based on the Android 4.1.2 XXLSJ Jelly Bean firmware that got out online a few weeks ago. You can install Android 4.1.2 Chameleon XXLSJ Jelly Bean on Galaxy S2 I9100 using our tutorial below. You need to have a custom CWM recovery installed. On a side note, we also have Android 4.2.1 AOKP ROM for the Galaxy S2.

In this tutorial, we will guide you how to update Galaxy S2 I9100 to Android 4.1.2 Chameleon XXLSJ Jelly Bean with complete steps. This tutorial requires you to have a rooted Galaxy S2 with a custom recovery (ClockworkMod) installed on your Android phone. Please make sure you backup all your Android data and carefully read all the tips given below before moving on to the tutorial on the next page. You will have to wipe everything on your phone while installing this ROM. Let’s continue with the tutorial below.


Disclaimer: All the custom ROMs and firmwares, official software updates, tools, mods or anything mentioned in the tutorial 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 😉

UPDATE: The official Android 4.1.2 (build XWLS8) Jelly Bean firmware update is now available for the Galaxy S2 I9100. Read the tutorial here!

Android 4.1.2 Chameleon XXLSJ Jelly Bean Firmware Details:

Chameleon custom ROM comes with the following amazing set of features:

Base: XXLSJ (4.1.2)
Kernel: PhilZ Safe Stock Kernel (brick-risk free)

Samsung System Apps
FM Radio

AOSP System Apps
Everything else

Stock ROM functionality
TV-OUT / stock FM radio
XXLSJ Hardware Composer (Butter)

NEW AOKP features
General UI
– Configurable notification backgrounds
– Recents – kill-all button, RAM bar
– Hold back to kill
– LCD density
– Quick pin unlock
– Configurable wallpaper, text color, battery %
– Volume music controls
– Choose up to 8 lockscreen targets
– Battery icon / battery bar
– Clock – center clock, am/pm style, color, day of the week
– Toggles
– Signal style
– Weather

You need to be rooted in order to install this custom firmware on your Galaxy S2 I9100:

Samsung Galaxy S2 USB Drivers

You will need to connect your Android phone with the computer. For that, please make sure you have installed the USB drivers for Samsung Galaxy S II properly. If not, you can download the latest official drivers from our Android USB Drivers section here:

Download Samsung Galaxy S II USB drivers!

Backup and Other Important Tips

Done with the USB drivers? Perfect. The tutorial is on the next page, but first, please take a look at the following tips and important points you need to take care of. These are important, as we don’t want anyone losing their personal data or apps:

Always backup your important data that you might need after you install a new custom ROM, an official software update or anything else. Make a backup for just in case, you never know when anything might go wrong. See below for some tips on how to backup data:

Samsung users can also back up data using Samsung KIES. If you backup data manually, you get more options what to 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.

If you already have a custom recovery (ClockworkMod, TWRP etc.) installed on your phone, we strongly recommend a backup using that as it creates a complete image of your existing phone set up.

A few more optional tips that you should remember:

1. Having problems connecting your Android phone to the computer? You need to enable USB debugging mode. See here: How to Enable USB Debugging — for Gingerbread, Ice Cream Sandwich and Jelly Bean.

2. Make sure your Android device is charged up to 80-85% battery level. This might help you: How to Check Battery Percentage. Why? Because, if your phone goes off suddenly while installing a custom ROM, flashing an official firmware update or installing mods etc. — your phone might get bricked or go dead permanently. No one wants that, right?

4. Most of the tutorials and how-to guides on Team Android are for factory unlocked Android phones and tablets. We recommend NOT to try our guides if your phone is locked to a carrier, unless we have specified the carrier name or device model.

If you find the above tips useful and they were helpful to you, please consider giving us a +1 or LIKE to thank us!

All set and ready? Good. Now, let’s proceed with the tutorial on the next page and install Android 4.1.2 Chameleon XXLSJ Jelly Bean on your Galaxy S2 I9100.