Followed by the success of RootBox v3.8, recognised XDA developer bajee11has announced the release of official RootBox ROM v3.9.1 featuring Android 4.2.2 Jelly Bean. The developer claims that the latest version is a very stable release.

The RootBox v3.9.1 is filled with a host of new features and fixes big issues found in the previous v3.8. Moreover, the random reboot and some major memory leak issues have been fixed in this release. The custom build adds support for four more Android devices.

Samsung Galaxy S3
RootBox ROM based on Android 4.2.2 Jelly Bean available for Galaxy S3 I9300.

RootBox v3.9.1 features

AOKP features

CyanogenMod profiles

Per App DPI

Per App tablet user interface

Per App Language

OTA updates-Goo Manager

Camera: save to external memory

Phone: Advanced phone settings

Phone: Noise suppression

MMS: Message rate alerts (Modify SMS message limit for alert)

MMS: Fully customisable MMS theme

MMS: Soft keyboard type

MMS: Emoji support

MMS: Read, delete, reply and call options in StatusBar for message

Home button call answer (Accessibility option)

Variable size patter lockscreen

Clock: Increasing Alarm

Clock: flip/shake-snooze or dismiss

Clock: Disable Alarm icon on StatusBar

One such custom build is available for the international version of Samsung Galaxy S3 with model number I9300. Galaxy S3 users who wish to experience Android 4.2.2 software, using the RootBox v3.9.1 ahead of the official release, may follow our step-by-step guide below. Users are reminded that this is a custom ROM and is now in its development stage; therefore, they may come across bug issues.

IBTimes UK reminds its readers that it will not be held responsible for any damage to the device, so proceed at your own risk.


1) Install USB Drivers for Samsung Galaxy S3 on the computer.

2) Ensure that USB Debugging Mode is enabled to transfer files using USB cable. [Press Menu>> Settings>> Applications. From there navigate and click on Development option and ensure the USB Debugging Mode is turned on.]

3) The phone should be unlocked.

4) The Galaxy S3 should be rooted and have ClockworkMod (CWM) Recovery installed.

5) Create backup of all data of phone.

6) The battery of the phone should have above 80 per cent charge.

7) The RootBox ROM v3.9.1 is compatible with only Samsung Galaxy S3; installing this on any other variant is likely to brick the device.

Steps to install Android 4.2.2 Jelly Bean RootBox ROM v3.9.1 on Samsung Galaxy S3 I9300

1) Download Android 4.2.2 RootBox v3.9.1 Jelly Bean ROM for Samsung Galaxy S3 to the computer

2) Download Google Apps package

3) Plug in the Galaxy S3 to the computer using USB cable. Then mount the storage first and copy the downloaded zip files to the SD card of the phone [Do not extract any files.]

4) Unplug the USB cable from the phone and turn the device off

5) Boot into Recovery Mode by pressing and holding Volume Up, Home and Power buttons together until the screen of the phone flashes. Then release all the buttons

Note: In Recovery mode use the Volume buttons to scroll between the options and use the Power buttons to select the required option.

6) In Recovery Mode first perform a Nandroid backup of the existing ROM which you can be restore later in case the new one does not work or when uou wish to return to the previous firmware. To perform a Nandroid backup, select 'Backup and Restore' and select 'Backup' again on the next screen. Return to the main recovery menu once the backup is completed

7) Now perform data wiping task in order to avoid clash between new ROM and the previous ROM. To do so, select 'wipe data/factory reset' then select 'Yes' on the next screen to confirm the action. Wait for some time until the data wiping process is over. Return to CWM Recovery main menu and select 'wipe cache partition'. Once the wiping cache partition process is completed, select 'Wipe Dalvik Cache' under 'advanced' option. After the action is completed, browse to recovery menu

8) Select 'install zip from sdcard' and select 'choose zip from sdcard.' Now navigate to the RootBox Jelly Bean ROM copied to the SD card. Select it pressing the Power button and confirm installation on the next screen. The installation process should begin now

9) After the ROM is installed, follow a similar procedure (step-8) to install the Google Apps zip

10) When the installation process is completed, go to main recovery menu and reboot the phone by selecting 'reboot system now.' The device will boot into the customised Jelly Bean ROM; it will take about five minutes for the first boot

[Note: In order to return to the previous ROM, boot the device into recovery then select 'Backup and Restore' and then restore the ROM by selecting it from the list.]

Once the Samsung Galaxy S3 I9300 boots up successfully, it should be updated and running on custom RootBox ROM v3.9.1. Navigate to Settings>> About Phone to verify the software version of the device.

[Source: Droid Noobs]