Galaxy S3 i9300 Gets Jelly Bean Update with Leaked XXBLH4 Official Firmware [How to Install]
Photo: XDA Developers

Owners of Galaxy S3 international model (i9300) are in for a double treat, as yet another official Jelly Bean firmware - XXDLH4 - has been leaked for Samsung\'s flagship smartphone within a span of two days since the first leak. The first leaked ROM porting Android 4.1 Jelly Bean OS for Galaxy S3 is not a stable build, as it is still under development in its beta stage. The rapid firmware leaks for the official Jelly Bean software clearly suggest that Samsung is busy working on the next Android iteration for its flagship smartphone, while an official public release of the same looks imminent.

Unlike the first leaked firmware for Galaxy S3 i9300, the XXDLH4 firmware needs to be flashed from ClockworkMod recovery instead of the regular Odin method. The leaked firmware is still in its beta stage and may contain some critical bugs or functional disorders.

Users are advised to consider it as good as a developer preview version for testing and demo purpose, and not an ideal build for everyday use. Users are at liberty to try the software at their own risk. Besides they can always revert to the much stable Android 4.0 firmware later if desired.

Prerequisites

Galaxy S3 i9300 Gets Jelly Bean Update with Leaked XXBLH4 Official Firmware [How to Install]
Photo: XDA Developers
  • The ROM and the instructions provided in this guide are applicable to the international model Galaxy S3 i9300 only and will not work with US variants or any other device. You may verify your device\'s model number by navigating to Settings > About Phone.
  • IBTimes UK advises users to backup important personal data (bookmarks, contacts, SMS, MMS, APNs and other internet settings) including contents of the SD card, to avoid data loss while performing the Jelly Bean firmware update.
  • The instructions provided in this guide are meant for reference purpose only and do not cover any warranty claims involving device damage or issues arising out of using this firmware update.
  • Make sure that ClockworkMod recovery is installed on your device before performing this firmware update.

How to Install XXBLH4 Based Jelly Bean Firmware on Galaxy S3 i9300

Galaxy S3 i9300 Gets Jelly Bean Update with Leaked XXBLH4 Official Firmware [How to Install]
Photo: XDA Developers

Step 1: Download the baseband firmware XXBLG8 from here

Step 2: Now, download the leaked XXDLH4 official Jelly Bean firmware from here

Step 3: Without extracting, copy both the downloaded zip files in step 1 and step 2 to the internal SD card on your phone.

Step 4: Now, power off your phone and boot into ClockworkMod recovery by performing a button sequence. Press and hold down Volume Up, Home and Power buttons together until the screen turns on, then release them. The phone will now boot into ClockworkMod recovery. In recovery menu, use volume buttons to navigate up/down and home button to select an option.

Step 5: Take a Nandroid Backup of your current ROM, so that you can restore it from recovery if something goes wrong with the new Jelly Bean ROM. To do a backup, choose Backup and Restore and on the next screen, tap Backup again. Return to main recovery menu once backup is done.

Step 6: Choose install zip from sdcard, then tap choose zip from sdcard. Browse and locate the Samsung-Updates.com-GT-I9300_BTU_1_20120806161432_al03it6wa2.zip file on the SD card and select it. Confirm installation by clicking Yes on the next screen to install the XXBLG8 ICS baseband firmware.

Step 7: Once the baseband firmware is installed, hit go back then tap reboot system now to reboot the phone. Wait for the phone to boot up. Once the phone boots up, power it off and boot into recovery again (using the procedure explained in step 4).
NOTE: If your phone fails to boot up even after 5 minutes, simply remove the battery on the phone, re-insert it, then boot into recovery. Now, wipe data by tapping wipe data/factory reset. You must wipe data only if the phone doesn\'t boot after flashing the XXBLG8 ICS firmware.

Step 8: Now, choose install zip from sdcard again, then tap choose zip from sdcard. Locate the Samsung-Updates.com-GT-I9300-BTU-JB_4_1_1-I9300XXBLH4-OTA-INTERNAL.zip file on the SD card and select it. Confirm installation by clicking Yes on the next screen to install the Jelly Bean firmware.

Step 9: After the Jelly Bean firmware is installed, hit go back, then tap reboot system now to reboot the phone. Wait for the phone to boot up into the Android 4.1 Jelly Bean XXDLH4 firmware.
NOTE: To restore your previous ROM, boot into recovery (using the procedure explained in step 4), tap backup and restore then restore your previous ROM by selecting it from the list.

The leaked XXDLH4 official Jelly Bean firmware is now installed on your Galaxy S3.

[Source: The Android Soul]