How to Install Galaxy S3 I9300 Android 4.3 CM10.2 Jelly Bean Custom Firmware

• Last modified: Tips

Android 4.3 Jelly Bean for the Galaxy S3 I9300 is now available! You can now download CM10.2 custom ROM to get the stock Android 4.3 on Galaxy S3 I9300. This is an early nightly build of the CM10.2 firmware, but it is good enough to try it out on your Android device — it will be getting all the aweosme new features of CyanogenMod in the next few days/weeks. If interested in Android 4.3 for other phones, check out our new Custom ROMs section. You can update Galaxy S3 I9300 to Android 4.3 CM10.2 Nightly Jelly Bean custom firmware using the tutorial below. This is not an official release by Samsung, but just a custom ROM that is based on the latest AOSP release and would require a custom recovery like ClockworkMod in order to flash the ROM zip and Google Apps zip files on your phone.

As you continue reading below, we will guide you through the entire process of how to install Android 4.3 CM10.2 Nightly Jelly Bean on Galaxy S3 I9300 with complete steps. Please make sure you backup all your data as given below because this tutorial will wipe your data. This is similar to installing any other custom ROM on your Galaxy S3. Let’s move on to the tutorial now.

CM10.2 Android 4.3 Jelly Bean

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 (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 ;-)

Android 4.3 CM10.2 Nightly Jelly Bean ROM Details:

For those who are new to to CyanogenMod, please read the following:

CyanogenMod (pronounced sigh-AN-oh-jen-mod), is a customized, aftermarket firmware distribution for several Android devices (See above for supported devices & how to install CyanogenMod on said devices). Based on the Android Open Source Project, CyanogenMod is designed to increase performance and reliability over Android-based ROMs released by vendors and carriers such as Google, T-Mobile, HTC, etc. CyanogenMod also offers a variety of features & enhancements that are not currently found in these versions of Android.

NOTE: Since this is an unofficial nightly build, make sure you know that after installing this firmware update, your Android device 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 or any other stable custom ROM.

There are tons of useful articles and how-to guides on Team Android for the Samsung Galaxy S3, but we think you might be interested in the following posts:

Like this CM10.2 Nightly ROM based on the latest Android 4.3? We love it too and we know you are looking forward to install it on your phone now. Now please read below for important tips on how to make sure your installation goes smooth and you do not end up with any problems.

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. Now, let’s proceed with the tutorial on the next page and update Galaxy S3 I9300 to Android 4.3 CM10.2 Nightly Jelly Bean custom firmware.