Update AT&T Galaxy S3 SGH-I747 to Android 4.4 KitKat CM11 Unofficial Beta Custom ROM

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Android 4.4 KitKat is now available for the AT&T Galaxy S3 SGH-I747 as an unofficial CM11 custom ROM. This is great news for those who want to give this ROM a try and see what Google has introduced in Android 4.4 KitKat and what are we going to see in CM11. This is an early developmental build, so expect a few features to not work at all. make sure you backup your current ROM before installing this. You can update AT&T Galaxy S3 SGH-I747 to Android 4.4 KitKat CM11 custom firmware using the tutorial below. This is not an official release by Samsung, but just a custom ROM which would require a custom recovery like ClockworkMod in order to flash the ROM zip and Google Apps zip files on your phone. For Android 4.4 KitKat on T-Mobile Galaxy S3 T999, click here!

In this tutorial, we will tell you how to install Android 4.4 KitKat CM11 ROM on AT&T Galaxy S3 SGH-I747 with complete steps using CWM recovery. We also have several tips on how to backup your phone data and also some more tips that you have to keep in mind before proceeding to the tutorial on the next page. You will have to wipe your previous personal data and apps as usual when installing custom ROMs. The following tips are important as they will help the installation procedure to go smooth without any issues. Let’s begin with the tutorial below.

Android 4.4 CM11 KitKat

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 4.4 KitKat CM11 ROM Details:

NOTE: Since this is not a final 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 AT&T Galaxy S3, but we think you might be interested in the following posts:

Like this CM11 ROM based on the latest Android 4.4? 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 AT&T 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 AT&T Galaxy S3 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, Jelly Bean and KitKat.

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 AT&T Galaxy S3 SGH-I747 to Android 4.4 KitKat CM11 custom firmware.