How to Update Galaxy S2 with Jellybean 4.3 Firmware Update – Guide

An all new AOSP Jellybean 4.3 Android version has popped up for Galaxy S2 smartphone. While there are still no cues about the arrival of Jellybean 4.3 firmware update for the phone, you can apply this manual update which we will be discussing in the due course of this article. The best part of this AOSP build is that you not only get more usable RAM but also comes with the cleaner Nexus looking UI which is nothing but the Official Google’s UI along with minimal number of Default apps. So before we move on to check on what are the quick pre requisites you will need to follow, follow the list of quick pre requisites mentioned below.

Jellybean4.3_GalaxyS2_1 Jellybean4.3_GalaxyS2

Note: This firmware update should ONLY be applied to Galaxy S2 GT I9100 variant and to no other Galaxy S2 variant.

Quick Pre Requisites:

  • Backup all your important data present in your Samsung galaxy S2 with the help of below mentioned steps. Make sure that you are not creating the backup of data with the help of KIES as it won’t detect your S2 as this is the custom ROM firmware.

SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log -Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names”

  • Head over to the path “Settings > Applications > Development > USB debugging” to enable the same. Also, most importantly you will have to make sure that the minimum battery left in your Galaxy S2 is not less than 50% or else the device might just get turn Off.
  • This being a custom ROM firmware, you will need to make sure that your Galaxy S2 is rooted. To check the same, download the “Root Checker” app from Google PLAY Store.
  • If your Galaxy S2 is not rooted, with the help of below mentioned 2 sequential steps, you will need to root the same.

How to Update Samsung Galaxy S2 GT I9100 with Official ICS 4.0.4 XWLPO Firmware

How to Root Galaxy S2 GT I9100 on ICS XWLPO 4.0.4 Firmware

Disclaimer: We should not be held responsible / liable in any manner for the damage happened to your Galaxy S2 due to not following instructions.

Once your S2 is rooted, head over to the next step where we have summed up the detailed guide to update with the Jellybean 4.3 powered with Paranoid Custom ROM Firmware.

Procedure to Update Galaxy S2 I9100 with Jellybean 4.3 Android OS:

  • Once placed, you need to enter the device in Recovery Mode. Recovery Mode in Galaxy S2 can be entered either with the help of ROM Manager app or by the manual method.
  • Manually Galaxy S2 can be entered in the recovery mode by pressing Volume Up Key, Centre button, and holding both simultaneously press the Power Button after which you will get to see a green robot indicating that the device has entered in the recovery mode.
  • Select “install zip from SD Card” to choose the Jellybean 4.3 Android Firmware Package and then the Google Apps Package. Once selected, you will need to wait for the update process to complete. Typically it should take round about 3 -4 minutes.
  • Once the device is updated with the firmware and you see the home screen in your device, head over to the path “Settings > About Phone” to check out the current firmware version which should read as “Jellybean 4.3”. Just in case if the firmware is not Jellybean 4., then you will have to re follow all the above steps.

Note: Just in a rare case if the device doesn’t boot up or show the home screen then remove the battery and reinsert the same to boot the device again in the normal mode.

Do let us know in the comments section just in case if you face any issues in the process of firmware update.



  1. have you got the solution of ur problm buddy

  2. Manually installed upgraded according to your guide. All works, thanks! Previously unlocked and rooted the phone. Good tutorial and no dodgy links to the zip files as is often the case with many other websites.

  3. after doing everything as explained it shows the start screen ParanoidAndroid 3+ with color changing logo but it doesn’t go further…. waited over 10 min but nothing else changed. I reinserted battery as you explain above but same thing again. Any advice to help?

  4. im not able to update it to 4.3 .. im using 4.1.2 rooted phone ? why is that ?

  5. Hi…
    Used this update… its very nice.. but have some doubts…

    1. System settings display is very small.

    2. while receiving call, it shows details like “True Caller”, will it export my contacts to somewhere? or how disable this export.

    3. Also I am unable to drop down status bar from home screen, it is not showing Battery or network icon.

    Request your help in above things.

  6. It is showing the dophin and ParanoidAndroid 3+.
    How much time does it take on that screen though?

  7. Stupid question, how can I add extra home screen?

    • No Question is Stupid :) you can add extra home screen by pinching the screen and then tap on “+” Mark on the screen. Do let us know for more help on Android. We are here to help :)

  8. Play store is not working. it shows No connection even after i connect with wii/data. i can brows or whats app but no play store.

  9. after doing everything as explained it shows the start screen ParanoidAndroid 3+ with color changing logo but it dosent go further…. wating for more than 20 min. please guide.

    I was using 4.1.2 Bitrof……

  10. Do we need to do a factory reset, &/or wipe dalvik cache, before applying the rom ?

  11. after updation the extreme bottom of screen touch is not proper. i have to touch little up like 2mm up from the bottom of the display.

    • you should turn off pie trigger zone

      • Thank you my friend thank you so much. it is ok now. I have another problem like the play store is not working. it saying no connection retry. i have working (wifi and or dataplan) internet connection but still in vain. pls help me.

  12. I have done as you mentioned above but while at the first starting itself it got stuck and showing one fish’s drawing and blinking it not proceeding further.

    • hi pradeep. its ok now. after deleting caches it got rebooted properly and it works fantastic. thank you thanks alot.

  13. Will this update lock my carrier service

  14. I installed it & its stuck in the booting page with the name “ParanoidAndroid 3+”
    how much i re install the same happens. Help me please. can’t use the phone at all now

  15. Why all the firmwares from AOSP are so …….?
    Please check the firmwares, before you add them, so there is no need for us to complain.
    Of course this update its not functional, so dont bother to try it.