Flash Android 4.3 Jelly Bean JWR66V leaked update for Samsung Galaxy S4 Google Edition I9505G

Leaked Android 4.3 Jelly Bean JWR66V Firmware for Samsung Galaxy S4 Google Edition now available

A new leak of the Android 4.3 JB is now available for the Galaxy S4 Google Edition phone. Use this tutorial and learn how to successfully install it without bricking your device.

This is not an official update by Samsung / Google, which is why you should only install it for testing purposes. In order to make sure that you successfully install the leaked update, you will first have to take a look at the following guidelines:

  • Android 4.3 JWR66V leaked firmware will work only with the Galaxy S4 phones with the following model numbers: I337, I337M, M919 and I9505.
  • It will work for the I9505G which is the standard Galaxy S4 Google Edition phone, obviously.
  • Do not attempt to flash this firmware on any other Galaxy S4 variant.
  • Galaxy S4 AT&T devices should be running the UCUAMDL or UCUAMF3 baseband version, as otherwise you won’t be able to flash the update with custom Recovery.
    > if the baseband version is different from the ones that I’ve listed above, then you will have to flash the updated modem using stock Odin.
  • Your device has to be rooted and running a custom Recovery image such as TWRP or CWM. In this post you’ll find instructions for both Recovery variants.
  • This Android 4.3 JB zip doesn’t contain root nor any other custom mods, but you can apply any customization after the installation is complete.
  • This is a ROM that is Odexed and it doesn’t contain any modifications.
  • Make sure that your device’s battery has enough power left before switching off completely.
  • Use this tutorial only if you’re and advanced user.
  • Create a full NANDROID backup before continuing to the next post. This will set a restore point for your device and it can be used in case something doesn’t go as planned.
  • Since you’ll be installing a new ROM, you will be forced to wipe data and factory reset the device. Use the following tools to backup SMS info, Call Logs and APN internet Settings. Root access will be required for some of these tools: SMS backup & restore | Call Logs backup & restore | APN Settings Backup & Restore.
  • Also, sync your Contacts info with your Gmail account so that you won’t lose any important phone numbers in the process.
  • Enable the USB debugging from Developer Options menu.
  • Read all instructions that I have listed and make sure not to skip any steps.
  • Note that we cannot be held responsible in case you lose any data in the process. This is a tutorial that should be used only if you know what you’re doing. In case you’re having problems updating your device, then you should ask for extra help in comments.

These were all the guidelines that you had to go over before continuing to the tutorial. Below you can find two guides, one that uses the CWM Recovery and another one that teaches you how to flash the leaked update files with TWRP Recovery. Use the one that matches the Recovery image you use as default for your device.

How to flash Android 4.3 Jelly Bean JWR66V leaked firmware for Galaxy S4 Google Edition with TWRP Recovery:

  1.  Download the JWR66V firmware zip from HERE.
    > that’s an XDA link and you should download the file that is required for your device.
    > I’ve decided against posting a direct download link, as the XDA thread is continuously updated with new and more stable versions of the ROM.
  2. After the download is complete, you need to connect your Galaxy S4 with your computer via USB cable.
  3. Copy the zip file to your device’s internal SDcard.
  4. Disconnect the phone from PC when the files have been moved completely.
  5. Power off the Galaxy S4.
  6. Boot it into CWM Recovery Mode.
    > if you don’t know how, use this post here to learn.
  7. Select ‘backup and restore’ option from the main CWM Recovery screen. Create a NANDROID backup of your current ROM.
  8. Next, select ‘wipe data/ factory reset’ option and confirm that you wish to complete this action.
  9. Now, select ‘install zip from SDcard’, then ‘choose zip from sdcard’.
  10. Find the JWR66V Jelly Bean 4.3 zip. Confirm the installation.
  11. When the ROM is installed, return to the main recovery screen and select ‘reboot system now’.
    > The first boot process might take at least 5 minutes to complete.
  12. Enter your Google Account details when the Galaxy S4 / Android 4.3 home screen appears.
  13. Take control over your device and start testing its new features, as the installation is now complete.

If you’re using the TWRP Recovery with your phone, then you need to follow the instructions listed below.

How to flash Android 4.3 Jelly Bean JWR66V leaked firmware for Galaxy S4 Google Edition using CWM Recovery:

  1. Download the JWR66V firmware zip from HERE.
    > that’s an XDA link and you should download the file that is required for your device.
    > I’ve decided against posting a direct download link, as the XDA thread is continuously updated with new and more stable versions of the ROM.
  2. When the file is downloaded successfully, connect the SGS4 with your PC using the USB data cable.
  3. Move the JWR66V zip on your phone’s internal SD card storage. When the file is copied, disconnect the phone from computer.
  4. Power off the Galaxy S4.
  5. Boot your device into TWRP Recovery. If you don’t know how to do it, use the info listed here.
  6. Select ‘backup’ option and then create a NANDROID backup of your current ROM.
  7. When the backup is ready, select ‘Wipe’, then press Factory Reset. Confirm by swiping the blue sliders shown at the bottom of the screen.
  8. Next, select ‘Install’. Browse your device’s internal SDcard for the JWR66V zip file.
  9. Confirm that you wish to flash the new ROM. Wait several minutes for the installation to complete.
  10. Return to the main TWRP Recovery screen, select ‘Reboot’, press ‘System’ and now wait for your Galaxy S4 to boot into normal mode.

After the device displays the home screen, enter your Google Account credentials to take control over the new Android 4.3 Jelly Bean leaked ROM.

If you have any other questions, use the tutorial listed below and we will offer you viable solution for any problems that you’ve encountered during the updating process.