Galaxy S3 Receives Android 4.3 via SuperNexus 3.0 ROM – How To Install

Galaxy S3 I9300 users can now install the SuperNexus 3.0 ROM on their devices to enjoy Pure Vanilla look on their devices, though you can convert your Android to Stock Vanilla using the tutorial that we wrote some days back. But the drawback is you won’t be able to enjoy Android 4.3 which is the latest iteration of Android as of now and the bloat-ware free operating system.


Apart from the Android 4.3 Jelly Bean update, the Galaxy S3 owners can experience the latest CM kernel and Stock Jelly Bean interface that is seen on the Nexus devices. The ROM comes pre-rooted, fully Deodexed, with optimized Android Source Code.

Features of SuperNexus 3.0 ROM

  • Android 4.3 Jelly Bean (JSS15J – Android-4.3_r2.1)
  • Latest CM kernel
  • All Jelly Bean features and Apps (Nothing excluded from AOSP)
  • No visual changes
  • Stock Jelly Bean look and feel
  • Brings Nexus-styled interface and features for Galaxy S3

You can head to the official development page at xda to know more about this ROM.

Below is a list of devices that are officially supported:

  • AT&T Galaxy S II (i777)
  • AT&T Galaxy S4 (jflteatt)
  • Samsung Galaxy S II (i9100)
  • Samsung Galaxy S IIG (i9100g)
  • Samsung Galaxy S III (i9300)
  • Samsung Galaxy S4 (i9500)
  • Samsung Galaxy S4 LTE (jfltexx)
  • T-Mobile Galaxy S4 (jfltetmo)
  • Samsung Galaxy Note (n7000)

If your device is in the list, then you’re good to go, proceed with the tutorial below, and get the SuperNexus 3.0 ROM up and running on your device.

Make sure that you backup the data stored on your device, read how we can completely backup an android device’s data.

The procedure that we have written is for the Galaxy S3 I9300 running CWM recovery, the procedure is almost the same for all devices, but in some cases it can be different, for example when you’re using some other Custom Recovery such as TWRP.

Lets proceed with the installation without wasting anymore time.

Installing SuperNexus 3.0 ROM on Galaxy S3

Step 1: Download the SuperNexus ROM from the official development thread and Google Apps from this link

Step 2: After the downloads are complete, transfer the files to the internal storage of your device

Step 3: Boot your Galaxy S3 into recovery mode (Volume up + Home + Power).

Step 4: In Recovery mode:

  • Wipe Cache
  • Advanced -> Wipe Dalvik Cache

Step 5: Now select “install zip from SD Card” then “choose zip from SD Card” and select the SuperNexus 3.0 ROM file and confirm the same. After the flashing of the ROM file is complete, flash the Gapps package using the same way.

Step 6: Reboot your device, it might take a couple of minutes while booting for the first time.

That’s how we can install the SuperNexus 3.0 ROM on the Galaxy S3 I9300.

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