Galaxy S II

Update Galaxy S2 GT I9100 with Stable Jellybean 4.1.2 Firmware – Guide

What if we tell you to install the custom ROM firmware in your Galaxy S2 which only fixes all the bugs in your current default factory firmware of Jellybean? So, let’s check out on how you can install the same in your device before which you will have to follow the list of quick pre requisites which are mentioned below. The firmware which we will eb checking out is the Jellybean 4.1.2 firmware. We have also mentioned the screen captures of this custom ROM firmware which is dubbed as “Biftor ROM”.

Note: Though applying this firmware update will void the Warranty, you can at any point of time revert back to the factory firmware of whose the link is mentioned below;

Manual Update Galaxy S2 GT I9100 with Jellybean 4.1.2 XWLSW Firmware – Guide

Quick Pre Requisites:

  • All the data in your Galaxy S2 GT I9100 should be backed up with the help of below mentioned steps so as to make sure that just in case if the data gets lost or corrupted, the same can be restored with the help of below mentioned steps,

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

  • Enable the USB Debugging Mode in your computer from the path “Settings > Applications > Development > USB debugging”. Also, the minimum battery life should be a minimum of 40% or else there is a risk of device getting turned Off in the middle of firmware update.
  • As this is a custom ROM, you need to make sure that your phone is rooted and installed with the custom recovery image. Just in case if your phone is not rooted, you need to root the same from the below mentioned steps;

Manual Update Galaxy S2 GT I9100 with Jellybean 4.1.2 XWLSW Firmware – Guide

Root Galaxy S2 GT I9100 on XWLSW Jellybean 4.1.2 Firmware – Guide

  • Custom Recovery image can be installed from the “ROM Manager” app which you can download from PLAY Store. Do check on whether your device is rooted or not with the help of the “Root Checker” app.

Disclaimer: Follow all the instructions mentioned in this article as if there is any damage caused due to not following instructions then we shall not be held liable or responsible. Just in case if you face any issues then we will try our level best to address the same.

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Let’s proceed to the next step where we have mentioned the detailed guide which will help you upgrade the Firmware with the latest Jellybean 4.1.2 Android OS.

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