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Jelly Bean for T-Mobile Galaxy S2: AOKP ROM Based on Android 4.1.1


Here’s another custom Android 4.1 Jelly Bean ROM for the T-Mobile Galaxy S2 for people to try out, while they wait for Samsung to announce whether the official Jelly Bean update for the device will even be coming or not. Jelly Bean is perhaps the most important update for Android, due to improvements and features such as a smooth as butter interface, Google’s voice recognition aka virtual assistant, improved and much more useful notifications, offline voice typing and more.

XDA Senior Member JPOKeefe has released an unofficial AOKP ROM based on Jelly Bean Android 4.1.1, which brings Jelly Bean to the T-Mobile Galaxy S2 with AOKP’s fast performance and extensive customization features for a great stock Android 4.1 experience without any unnecessary apps or bloat. The ROM is quite stable for every day use with mostly everything working, but it does have a couple of issues which are listed below (quoted from the developer):

Known Bugs:

  • Camcorder (video recording) doesn’t work.
  • External SD Card doesn’t mount when plugged into a computer.

Let’s take a look at how AOKP ROM based on Jelly Bean can be installed on the T-Mobile Galaxy S2.


This ROM and the guide below are compatible only and only with the T-Mobile Galaxy S2, model number SGH-T989. It’s not compatible with any other device. Check your device’s model number in Settings» About phone.


The methods and procedures discussed here are considered risky and you should not attempt anything if you don’t know completely what it is. If any damage occurs to your device, we won’t be held liable.

  1. This procedure will wipe all your apps, data and settings. Backup your Apps and important data — bookmarks, contacts, SMS, APNs (internet settings), etc. This Android backup guide would help you.
    NOTE: Don’t forget to at least make a backup of your APN settings, which you can restore later if your data connection does not work after installing the ROM. Use the backup guide to find out how.
  2. [Important!] Install the ClockworkMod (CWM) Touch recovery on the phone by following the guide → here.
  3. Download the latest version of the ROM and the kernel from the development page.
  4. Download the Google Apps package. This will install apps like Play Store, Gmail, etc. which are not present in the ROM by default.
    Download Gapps  |  Filename:
  5. Copy the 3 zip files downloaded in steps 3 and 4 to the internal SD card on the phone (do not extract them).
  6. Turn off the phone, then boot into recovery mode. For this, press and hold these 3 buttons together until the screen turns on: Volume UP + Volume Down + Power. Phone will boot into CWM recovery.
  7. Perform a Nandroid Backup of your existing ROM, so that you can always restore it from recovery if something does not work out with this ROM. To perform a backup, select Backup and Restore –> On the next screen, select Backup again. Go back to main recovery menu after backup is complete.
  8. Select wipe data/factory reset, then select Yes on next screen to confirm. Wait a while till the data wipe is complete (this will not erase your personal files on the SD card).
  9. Select mounts and storage, then select format /system to format the system partition (this will not affect internal/external storage). After format is complete, select go back to go back to the main recovery menu.
  10. Now select install zip from sdcard, then select choose zip from sdcard. Scroll to the ROM file on the sdcard and select it. Confirm installation by selecting Yes – Install on the next screen. The ROM will start installing.
  11. After ROM installation completes, select choose zip from sdcard again, then select the file to install the Google apps package.
  12. After gapps installation is complete, select choose zip from sdcard again, then select the kernel file to install the kernel, confirming installation by selecting Yes.
  13. After kernel installation is complete, select go back then select reboot system now to reboot the phone and boot up into AOKP.
    NOTE: To go back to your previous ROM, boot into recovery, select backup and restore then restore your previous ROM by selecting it from the list.

AOKP Jelly Bean Android 4.1 ROM is now installed and running on your T-Mobile Galaxy S2. Visit the development page for updates and more info. Share your thoughts on the ROM in the comments below.

Also try out CM10 for the T-Mobile Galaxy S2 → here.

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