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Update Galaxy S2 I9100 to Android 4.4.2 KitKat with AOSB Project ROM

AOSB Project is a new custom ROM that’s based on Android 4.4.2 KitKat. It can be installed on your Samsung Galaxy S2 I9100 if you closely follow all the instructions that are listed in this article.

This custom ROM is designed by ProBAM team, that’s the same name that this custom ROM was known as, but they decided to change it. AOSB Android 4.4.2 ROM packs the following features: multiwindow, HALO, RAM bar, audio stereo effect, incoming call dialog, xposed built-in, custom nav and ring bar, lcd density changer, DSP Manager, OTA Update support for new AOSB KitKat builds, and others. If you want to learn more read the developer web page here.

AOSB Android 4.4.2 KitKat for Galaxy S3 borrows elements from CyanogenMod 11, AOKP, Omni, Slim, Paranoid Android. Before starting the installation you need to take a look at the preparation guide below:

  • this guide works only with the Samsung Galaxy S2 model number I9100.
    – don’t update any other devices with the files that you will find in this post, as you will brick the firmware.
  • your Galaxy S2 has to be rooted and running the latest CWM or TWRP Recovery image.
    – if the latest build of either CWM or TWRP isn’t installed on your phone, then you cannot flash any new KitKat custom ROMs.
  • the tutorial will tell you to create a NANDROID ROM Backup and Factory Reset your phone.
    – NANDROID ROM backup creates a full restore point for your device.
    – Factory Reset wipes all data from system partition, but it leaves the internal and external sdcards unaffected.
    – Factory Reset is required as you need to perform a clean installation of this new ROM.
  • save data from installed applications, SMS and other similar files using the Helium app for Android.
  • sync Contacts info with your Gmail account.
  • the phone’s battery power level has to be over 50%, so that the phone will not switch off while you’re flashing the AOSB Project KitKat ROM.
  • this guide is for advanced users, do not blame us in case you lose any data nor in case you brick the device.
  • read the entire post, don’t skip any steps and you should be alright.

Now that you know all of the above you can get to the next part of this post and learn how to flash a custom KitKat ROM.

Flash AOSB Android 4.4.2 Project ROM for Galaxy S2 I9100:

  1. Download the ROM from here.
  2. Download Gapps for this ROM from  here.
  3. Connect your Galaxy S2 to your computer, then move both zip files to its internal storage.
    – after the files are copied you need to disconnect the phone from PC.
  4. Power off your device, then boot it in CWM or TWRP Recovery.
    – if you can’t boot recovery then you can learn with this post – that’s a guide for Galaxy S3, but it will work with Galaxy S2, too.
  5. First, create the NANDROID Backup of the installed ROM:
    – CWM: select ‘backup and restore’ option, confirm.
    – TWRP: press Backup, swipe to confirm process.
  6. Apply Factory Reset:
    – CWM: select ‘wipe data/ factory reset’, confirm.
    – TWRP: press on the Wipe option, swipe to factory reset the device.
    > you can apply Format System action, too.
    > go to the next step when done with both actions.
  7. Install the new AOSB Android 4.4.2 ROM for your Galaxy S2:
    – CWM: select ‘install zip from sdcard’, then you need to select ‘choose zip from sdcard’.
    – TWRP: press Install.
    > find the aosb_kk_1.3.2_i9100.zip ROM file and confirm installation.
  8. Install Gapps zip after the ROM is installed using the same actions as in step 7.
  9. Return to the main custom Recovery Mode menu when done installing and then reboot the phone in normal mode.
    – note that the first boot process takes a while before it completes the reboot.
  10. Use your Google Account info to take control over your phone.

After the Galaxy S2 boots in normal mode with AOSB Android 4.4.2 Project custom ROM then you should immediately power it off. Leave it turned off for a while and then boot in normal mode.

These were all the steps that you had to take in order to update your Galaxy S2 with a custom KitKat ROM. If you need any extra help then you should leave a comment below.

Note that in case the AOSB Android 4.4.2 ROM doesn’t installed on your Galaxy S2 at its first attempt, then you should repeat the entire tutorial several times until it manages to settle itself. Custom ROMs might not always install at the first attempt.

Samsung Galaxy S2 Articles