How to Install XXDLI5 Android 4.1.1 OTA Firmware for I9300BUBLG3 on Galaxy S3 I9300
XXDLI5 Android 4.1.1 Jelly Bean OTA firmware is slowly being released for a number of more regions. It looks like Galaxy S3 I9300 users will be getting the Jelly Bean update before any other Samsung device. This new OTA firmware has a different perquisite firmware this time. It requires you to have BUBLG3 Android 4.0.4 installed on your phone. You can (install it and) update from this step-by-step tutorial we have written for you. Remember, this is just an OTA update (not a full firmware) because of which, you will need to first install I9300BUBLG3 as the base firmware (ignore if you already have it) and then install the new I9300XXDLI5 Jelly Bean OTA firmware update. We have the full tutorial below as you read this post and also a tutorial to root XXDLI5 firmware.
As you continue reading this post, we will guide you through how to install XXDLI5 Android 4.1.1 Jelly Bean OTA firmware on Galaxy S3 I9300. Don’t forget to backup all your personal apps and settings as given below. Jump over to page 3 for XXDLI5 firmware if you already have Android 4.0.4 BUBLG3 installed. Let’s continue with the tutorial now.
Disclaimer: All the tools, mods or ROMs mentioned below belong to their respective owners/developers. We (TeamAndroid.com) or the developers are not to be held responsible if you damage or brick your device. We don’t have you on gun point to try out this tutorial 
NOTE: Since this is a leaked firmware, make sure you know that after installing this firmware update, your can get FC errors, boot loops, several other bugs, apps might not work or worse, your phone might not boot. To fix, you will have to reinstall stock firmware.
Android 4.1.1 XXDLI5 Firmware Details:
Base Firmware: I9300XXDLI5 (4.1.1)
Region
Country: Europe
Carrier: United Kingdom
Build Date: 17th September 2012
Modem:
CSC: OXADLI5
Change List:
Make sure you have installed all your USB drivers for the Samsung Galaxy S III to connect it with the computer. Download Samsung Galaxy S3 USB drivers! Apart from just the USB drivers, there are a few more things that you need to take care of.
1. You need to enable USB debugging mode. This helps to connect your Android phone with the PC. See here: How to Enable USB Debugging. (optional, when updating via ODIN).
2. Your phone battery should be 80-85% charged. If your phone goes off suddenly because of battery, during flashing ROMs or installing mods and updates — your phone might go dead permanently. See here: How to Check Battery Percentage.
3. Backup all your important data that you might need as soon as your flash a new ROM, or make a backup for just in case, you never know when anything might go wrong. See below on how to backup data:
- Backup your SMS messages. How? –> How to Backup/Restore SMS Messages.
- Backup Contacts, Gmail and Google Data. How? –> Sync with Google Sync.
- Backup Call History. How? –> How to Backup Call History.
- Backup WhatsApp Messages. How? –> How to Backup/Restore WhatsApp Messages.
- Backup APN Settings: GPRS, 3G, MMS Settings.
Data can also be backed up using Samsung KIES for their devices, but if you backup data manually, you get more options what top choose from and it is very easy to move data across Android devices from different manufacturers, i.e moving Samsung Galaxy Note backup data to HTC One X.
4. Your phone should be factory unlocked. Additional instructions for locked Android devices will be added in the tutorial for unlocking devices.
Now, let’s proceed with the tutorials on the next page and update Galaxy S3 I9300 to XXDLI5 Android 4.1.1 Jelly Bean official OTA firmware.
