Download Android OS 4.1 Jelly Bean ROM for Samsung Galaxy S3 | Upgrade Steps

Do you own the international version of the Samsung Galaxy S3, then this is certainly going to be a great news for you people that an unofficial ROM of Android 4.1 Jelly Bean has been released for the best Android-powered Samsung smartphone-Galaxy S3. This new version of Google’s Android operating system – Android 4.1 Jelly Bean is faster, has a cleaner home screen, a new camera app and much better notifications. The search experience in Jelly Bean has a new look-and-feel, and has faster and more natural Voice Search.

As per Google, it has been stated that Jelly Bean will arrive for Galaxy S3 and S2 in mid-July of this year. Still, if you can’t wait for its official arrival, then you can use this unofficial Jelly Bean ROM. This unofficial ROM was released out from the preview build of this firmware. Being just a preview version of Jelly, a lot of functions and features are not working in this ROM.

NOTE: – Works only with the international edition of Galaxy S3 i.e. GT-I9300. So if you are using any other variant of this smart phone, then don’t ever try to install this firmware.

This ROM uses a modified CM9 (CyanogenMod 9) kernel which makes this firmware more

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resourceful and as for what’s working and what’s not, here’s a list of those features.

What Works:

  • ADB
  • Touchscreen
  • Hardware Acceleration
  • Notification LED
  • SMS
  • Accelerometer
  • Cellular Radio (But No Audio so no Calls)
  • Physical Buttons
  • Charging
  • Maybe More

What doesn’t Work:

  • Wi-Fi/Bluetooth/NFC
  • Audio
  • MTP
  • Storage
  • Camera
  • Maybe more

So would you be willing to sacrifice all of this for a premature taste of Android 4.1 Jelly Bean before the official version arrives? For all practical intents and purposes there is no point in installing this version. But if you are being curious enough, then go-ahead.

Disclaimer: Please attempt this guide at your own risk. We won’t be responsible in case your device gets damaged or bricked in any way due to this method.



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  • A rooted Android device. If you haven’t, then you need to root your device.
  • ClockworkMod recovery installed on your device.
  • Download Android 4.1 Jelly Bean

Note: Please backup all your data, application and original ROM because this ROM can NOT be your daily driver.


Step 1: Download Android 4.1 Jelly Bean for Galaxy S3. Then put into Galaxy S3 external SD Card.

Step 2: Power off your Galaxy S3.

Step 3: Press Galaxy S3 Volume Up Button + Power Button +Home Button until boot into CWM Recovery Mode.

Step 4: Select wipe data/factory reset, then select ‘Yes’ to confirm.

Step 5: After wipe data/factory reset process is complete. Select “install zip” from SD Card and select “choose zip” from SD Card.

Select “Yes – Install Android-4.1-JellyBean-GNex-OTA-Port”. The installation process is start now.

Step 6: Android 4.1 Jelly Bean will completely flash into your Galaxy s3 within 3 minutes. Reboot your galaxy S3 once the installation Complete. That’s All!

And now get ready to use your Galaxy S3 with jelly bean!!

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