A few weeks ago Google announced the new Jelly Been 4.3 update that would be immediately available for Nexus devices, such as Nexus 4 and Galaxy Nexus covered in our tutorial, and in the next months to devices from other manufacturers. But probably you are on of those Samsung Galaxy S2 or Galaxy S3 owners who are itching to try this new update from Google.

4.3

Thanks to Android developers, there’s an available custom ROM for Samsung Galaxy handsets named CM10.2. Of course this is just an experimental ROM so don’t expect a totally bug-free system running on your device.

First of all, let’s go through the updating process for Nexus 4 and Galaxy Nexus users.

NOTE! Samsung Galaxy S2 and Galaxy S3 owners, there is a different tutorial for you down below on this page.

  1. Go to Settings > About phone > System update. Look if Google has already made this update available for you. If so, go ahead and install it. If not, check out the next steps.
  2. Now we’re going to force your handset to download this update. Go to Settings > Apps and click on All tab. There you will find Google Services Framework, select it. Click on Clear data button.
  3. Return to Settings > About phone > System update and check whether the Jelly Bean 4.3 update is now available for you. If not, repeat Step 2 until it is. Most likely you won’t have to repeat it, as almost all users reported that it worked first time.
  4. An Android 4.3 System Update screen will eventually show up on your device, click Restart & Install button and your device will automatically reboot with Android 4.3 on board.

NOTE! If you have problems updating apps from Google Play, re-add your Google account in Settings > Accounts. The problem should now be fixed.

Now it’s turn for owners of Samsung Galaxy to update to the latest Jelly Bean firmware. The CyanogenMod (CM10.2) we’ve talked about earlier requires ClockWorkMod Recovery to be already installed on your device. So here’s the detailed tutorial for you:

NOTE! This guide is only for Samsung Galaxy S2 I9100G and Samsung Galaxy S3 I9300. We are not responsible for what’s done to your device. Please do the below steps very carefully in order not to brick your handset.

Prerequisites:

  1. First of all, fully backup your phone. Going through this process will wipe all your data.
  2. Make sure you have at least 70% left on your battery.
  3. Enable USB debugging by navigating to Settings > Applications > Development > Debugging.
  4. Install USB drivers correspondently to your device. To do this, please visit Samsung’s Developer page. (LINK)
  5. MOST IMPORTANT! Your device should be rooted and unlocked. If it’s not rooted yet, please follow the steps from our earlier posted tutorial on how to root Samsung Galaxy S3. That tutorial suits your Galaxy S2 too.

Installing CustomWorkMod Recovery:

Download and extract ClockWorkMod Recovery to Desktop. Installing it will require the same steps you went through the rooting process. So:

1. Turn off your handset and wait like 5-6 seconds for the vibration confirming it’s completely shut down then, boot the phone into Download Mode by holding Volume Down, Home and Power buttons all together until Android appears on the screen. Then press the Power button again to enter Download Mode.

2. Run Odin.exe as Administrator and connect your phone into PC via USB. ID:COM box should now turn yellow. A successful connection should also be indicated by an “Added” message in Odin. This step might take some time.

3. Once your phone is successful connected, press the PDA button in Odin and pick the root file extracted during the first step.

4. Click on Start button in Odin to start installation process. It will take up to 6 minutes, so please be patient.

5. Eventually, you will get a “Pass!” notification in the ID:COM box and your device will reboot automatically.

NOTE! Do NOT remove the USB cable while the handset is being flashed.

TROUBLESHOOTING! If your phone is rebooting into recovery mode, press “reboot system now” and then agree to disable flash recovery.

Installing CyanogenMod 10.2:

First, download CM10.2 for your device: Galaxy S2, Galaxy S3 Additionally, for Galaxy S3 you have to download Google Apps too.

NOTE! Do not extract these files. We are going to use them zipped on.

  1. Connect your phone to PC via USB and copy CM10.2 zip (+ Google Apps zip for Galaxy S3) on your SD card.
  2. Now fully shut down your phone and unplug it from PC.
  3. Boot into Recovery by pressing Volume Up, Home and Power buttons until the Galaxy S4 logo appears.
  4. Now you’re in ClockWorkMod Recovery. Run a data wipe first and then tap on Install Zip and select it by pressing the Power button. Again press Power button and select Choose Zip from SD Card.
  5. Using the Volume keys, select the 4.3 ROM and install it.
  6. Do again the previous steps only with Google Apps now (for Galaxy S3 users).
  7. Reboot your system and it’s done. You’re now running a custom 4.3 Jelly Bean ROM.
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