A new wave of Jellybean 4.2 firmware versions will be out very soon and in the due course of this article we will be checking out on how you can install the NxtGen Custom ROM firmware in your Galaxy S3 GT I9300 device. Though there is no ETA on by when there will be an Official firmware version of Jellybean 4.2 be rolling out, but as in when it comes we will keep you posted about the same. So, let’s check out on how you can update with one of the most loved firmware in your Galaxy S3. Please note that this is not an Official firmware released by Samsung Electronics but is a custom ROM firmware released by a recognized XDA developer eric-filth.
This firmware comes with add on features like call recording capability, faster kernel, ext4 file system for faster processing, more FREE RAM and also it comes with an extended power menu.
Disclaimer: Follow all the instructions carefully mentioned in this article, we should not be held responsible in any manner if your Samsung GALAXY S3 GT I9300 doesn’t boot up or gets bricked due to not following the instructions.
Since this NxtGen Custom ROM is not an Official firmware, it will require you to root your device. To check on whether your device is rooted or not, you will have to download the “Root Checker” app from the Google PLAY Store. Just in case if your phone is not rooted, with the help of below mentioned steps you will have to root the same. If your Galaxy S3 is not rooted, with the help of below mentioned steps, you will have to root the same. Also, don’t forget to install the “ROM Manager” app from the Google PLAY Store.
All the data in your device will get wiped off, so its recommended that you create a backup of all the data present in your device so that just in case if the data gets lost or corrupted, the same can be restored with the help of below steps. Don’t backup the data with the help of KIES as it doesn’t recognize the custom firmwares.
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”
From the path “Settings > Applications > Development > USB debugging”, enable the USB Debugging, ensure that the USB debugging option is ticked. Battery left in your device should be a minimum of 30%. Your computer should have Read / Write access.
Let’s head to the next page where we have summed up a detailed tutorial on how to apply this firmware update.