How to Update Galaxy S3 to jelly bean 4.2.1 leaked Frimware

When it comes to the leaked Android 4.2.1 Jelly Bean firmware in question, it’s available for download. Here’s a list of key enhancements in the Android 4.2.1 Jelly Bean firmware I9300XXUFMB3, provided by SamMobile:
Feature :
– Android 4.2.1 – JOP40D
– Improved Ripple effect on Lockscreen
– New Android 4.2.1 Lockscreen with widgets
– Daydream (Settings>Display)
– New Additions in Notification Center
– Notifications are more actionable
– Voice Command (Let’s you control various parts of the phone using voice commands)
According to a report from Ars Technica, the implementation of the voice command feature will be interesting to see “considering the handset already uses its native S-voice.”
“There also seems to be new additions to the Notifications center, though we’re not too keen on the implementation as seen in the screenshot above because it appears bloated with icons and options. Fortunately, it looks like it will live beyond a second screen in the Notifications shade,” the report added.
Based on the screenshots, provided by SamMobile, the first look of the Android 4.1.2 Jelly Bean seems more like the TouchWiz on Android 4.1 Jelly Bean currently. However, the inclusion of the lockscreen widgets will likely give the oomph!
While all the new features from Android 4.2 are apparently included, the only exception seems to be the Photo Sphere feature. The quick settings panel has also been overhauled with TouchWiz, looking handier than stock Android, Android Community reported.
“All those toggles should really come in handy – and keep the regular notification pulldown bar clear for those expanding notifications,” said the report.
How To Install
The steps for installing Android 4.1.2 Jelly Bean I9300XXUFMB3 on the Samsung Galaxy S3 (GT-I9300) are given below. But before trying out the tutorial there are some aspects that must be noted:
– Proper backups must be taken for personal data, apps and settings
– The phone must have at least 80 percent of battery power
– The firmware will increase the device’s binary counter
– The firmware will change the device status to modified
– The firmware does not have any modem; therefore the Modem being used before flashing the firmware will remain
– The firmware is a pre-release version, not official from Samsung Kies
– Being a pre-release version, the firmware will likely have some minor bugs
It must be kept in mind that this tutorial is only for Samsung Galaxy S3, model number GT- I9300. In addition, the users must proceed at their own risk. IBTimes cannot be held responsible for anything that goes wrong.
Let’s get started!
Step 1: Download I9300XXUFMB3_I9300OJKFMB3_ILO.zip and unzip the file.
Step 2: Open Odin 3.04 (included in the firmware package).
Step 3: Power off Galaxy S3 and put it on the Download Mode. To do this, press and hold the Volume Down and Home buttons while pressing the Power button until the Samsung Galaxy logo appears on the screen.
Step 4: Connect phone to the computer and wait until you get a blue sign in Odin.
Step 5: Add I9300XXUFMB3_I9300OJKFMB3_HOME.tar.md5 to PDA.
Step 6: Make sure re-partition is NOT ticked.
Step 7: Start flash and wait a few minutes.
Step 8: If you encounter any issues with the firmware boot into recovery mode (Home +power + volume up).
Step 9: Choose to wipe/ factory reset.
Step 10: Choose reboot.
[Source: SamMobile]

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