Tips & Tutorials

Install ZSDLL1 Android 4.1.2 on Galaxy S3 I9300 Jelly Bean Official Firmware

You can now download ZSDLL1 Android 4.1.2 Jelly Bean update for Galaxy S3 I9300. There is a slight update to it with ZCDLL1 update for same region. This firmware update is primarily for Galaxy S3 users in Hong Kong and China. I9300ZSDLL1 can now be downloaded from Samsung KIES and like always, in case you want to update manually, we have a working tutorial by which you can easily update Galaxy S3 I9300 to ZSDLL1 Android 4.1.2 official firmware. You can also root Galaxy S3 on this firmware. Remember, this is a region specific firmware (China, Hong Kong Taiwan), meaning you shouldn’t flash it on some different region device.

As you continue reading below, we will guide you how to backup your important data, some important tips and then tell you how to install ZSDLL1 Android 4.1.2 Jelly Bean on Galaxy S3 I9300. This is a region specific firmware (China – Hong Kong) but completely unbranded. Don’t forget to backup all your apps and personal data. Let’s continue with the tutorial now.


Disclaimer: All the custom ROMs and firmwares, official software updates, tools, mods or anything mentioned in the tutorial belong to their respective owners/developers. We ( 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 😉

Android 4.1.2 ZSDLL1 Firmware Details:

Version: 4.1.2
Date: 2012-12-28
Regions: China, Hong Kong

Root tutorial: How to Root ZSDLL1 Android 4.1.2 on Galaxy S3 I9300 Official Firmware. And if you wonder why you should root? Read: Benefits of Rooting Your Android Device.

Previous Jelly Bean official firmware tutorials for Galaxy S III:

Galaxy S3 Android 4.1.2 Firmware New Features:

  • Android 4.1.2 – JZO54K
  • Multi-View (Multi-Windows Multitasking, same as in Note II)
  • Page Buddy
  • New Gallery App (Same as in Note II)
  • Notification Panel (Notification Panel can now be customized)
  • Brightness Slider in Notification Panel Can Now Be Disabled
  • Smart Rotation (Screen Display adjusts to your angle of sightings)
  • Continues Input in Samsung Keyboard (Like Swipe or Android 4.2 Keyboard)
  • Paper Artist App
  • Group Cast App

Samsung Galaxy S3 USB Drivers

You will need to connect your Android phone with the computer. For that, please make sure you have installed the USB drivers for Samsung Galaxy S3 properly. If not, you can download the latest official drivers from our Android USB Drivers section here:

Download Samsung Galaxy S3 USB drivers!

Backup and Other Important Tips

Done with the USB drivers? Perfect. The tutorial is on the next page, but first, please take a look at the following tips and important points you need to take care of. These are important, as we don’t want anyone losing their personal data or apps:

Always backup your important data that you might need after you install a new custom ROM, an official software update or anything else. Make a backup for just in case, you never know when anything might go wrong. See below for some tips on how to backup data:

Samsung users can also back up data using Samsung KIES. If you backup data manually, you get more options what to 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.

If you already have a custom recovery (ClockworkMod, TWRP etc.) installed on your phone, we strongly recommend a backup using that as it creates a complete image of your existing phone set up.

A few more optional tips that you should remember:

1. Having problems connecting your Android phone to the computer? You need to enable USB debugging mode. See here: How to Enable USB Debugging — for Gingerbread, Ice Cream Sandwich and Jelly Bean.

2. Make sure your Android device is charged up to 80-85% battery level. This might help you: How to Check Battery Percentage. Why? Because, if your phone goes off suddenly while installing a custom ROM, flashing an official firmware update or installing mods etc. — your phone might get bricked or go dead permanently. No one wants that, right?

4. Most of the tutorials and how-to guides on Team Android are for factory unlocked Android phones and tablets. We recommend NOT to try our guides if your phone is locked to a carrier, unless we have specified the carrier name or device model.

If you find the above tips useful and they were helpful to you, please consider giving us a +1 or LIKE to thank us!

All set and ready? Good. You can now head over to the next page and update Galaxy S3 I9300 to Android 4.1.2 XXELL6 official firmware update.

About the author

Taimur Akmal

Devoted writer, enjoys developing code. Appreciates excellent food, exceptional coffee and great company. He is also into sublime design and nicely built cars.

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