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Update Nexus S 4G to JRN84D Jelly Bean 4.1 Custom ROM Firmware

The Nexus S 4G users are the next to receive the Jelly Bean 4.1 update, as a custom ROM has just been made available for their handsets. Until now, the Android 4.1 flavor was received by the Nexus, Nexus 7 Tab and Asus Transformer TF300T, but more and more versions of the software are being prepared for numerous Android powered smartphones and tablets. Anyway, now it’s Nexus S 4G moment, so we will be checking in how to update the same with the JRN84D Jelly Bean 4.1 Custom ROM firmware.

As already mentioned in the introduction, this is a custom ROM and not an official update released by Samsung for the Nexus S 4G users. We don’t know when the OTA variant will be made available, so if you just can’t wait, you should give this a try, or at least check the features that are included in the JRN84D software. The installation procedure will be easy to apply and completing it will take only a couple of minutes from your time. But for ensuring that you are doing all as it should, make sure that you are reading all the lines from this step by step guide.

You cannot update the Nexus S 4G to Jelly Bean if your phone is not rooted. Furthermore, after root access is granted you must install a custom recovery image too. I recommend you to get ClockWorkMod recovery because it is the best. But, what should interest you the most though is the warranty. As usual, when you are making changes into the internal system of your handset (this is happening when you perform a root operation) you are also losing its warranty. This means that if you are trying to apply this tutorial, the Nexus S warranty is already void. Don’t worry as you will be able to regain the warranty as soon as Samsung is releasing the official Jelly Bean. Then, by applying the ROM you will revoke the root access and restore the factory restrictions back to your S 4G.

For those who might consider this operation risky, I recommend to backup the current ROM first. In this way, if somehow something isn’t working, they can easily restore to the stock, or previously, variant of the Android firmware. Furthermore, you should backup all of your data too, because somewhere during the steps from below a full wipe will be required. If you choose not to save the data, then it will be corrupted and you can lose contacts, messages, call logs, internet settings, market apps, and more.

Now, as we are dealing with a custom ROM, don’t expect to see a real stable version of Jelly Bean. Some features might now work on your Nexus S 4G. From what we know there have been reported some issues related to the WiMax/4G, Face Unlock and GPS lock (navigation works…just no GPS signal). On the other hand, here are the features and capabilities that will power up the performances of your smartphone:

Jelly Bean 4.1 features for Galaxy Nexus S 4G

Jelly Bean 4.1 features for Nexus S 4G

For being able to flash the ROM you must have access to a Windows running computer, to the handset and to its USB cord. In order to properly connect the device with the PC you should enable the USB debugging option from your phone. Also, it should be charged, or you should ensure that it has at least 60 of battery power remain. On the PC and on the Nexus S 4G shouldn’t run any kind of security tools, including antivirus and Firewall protection. Don’t forget to root, install a custom recovery image and backup the data. Then, you can safely begin the steps from the guide below.

How to Update Nexus S 4G to JRN84D Jelly Bean 4.1 Custom ROM Firmware

  1. Download the update file on your computer.
  2. The download link is here.
  3. Then, take your Nexus and connect it with the computer; use its USB cable for that.
  4. Copy-paste the file downloaded before from the PC to your phone and don’t forget where you place the file.
  5. You can now remove the USB cable and disconnect the device.
  6. Turn it off.
  7. Reboot and try to enter recovery mode.
  8. The recovery mode can be reached by pressing on Volume down and Power buttons simultaneously.
  9. From the recovery mode menu you should do a full wipe. For this select “wipe data factory reset” followed by “wipe cache partition”.
  10. Then return back on the recovery menu: “+++go back+++”.
  11. From there select “install zip from sd card” and “choose zip from sd card”; pick the ROM file copied before.
  12. Click on “yes” and wait until the installation process ends.
  13. In the end you will be back on recovery mode.
  14. Select “+++go back+++” followed by “reboot system now”.
  15. Done.

Well, that was all for now. The Samsung Nexus S 4G is now updated with JRN84D Jelly Bean 4.1 Custom ROM Firmware. As stated above there are some bugs and things that aren’t working; the same will be resolved with the next version of the update. Since then this should do the job. Anyway, stay close as the official Android 4.1 is highly expected. If you had problems in understanding the steps from above or if something wasn’t working share the issues with us and we will try to help you through.

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