How to Update AT&T Galaxy S3 SGH I747 with Cyanogen MOD 10 Jellybean 4.1 Firmware

at&t LogoIt’s now Official, as Cyanogen Mod 10 which resembles more of a Jellybean 4.1 operating system can now be easily updated right on your AT&T powered Galaxy S3 I747 smartphone. This brings in a huge respite for all those who wanted to get some custom ROM firmware installed in their device. Over a period of this article we will be checking out on how you can install the latest firmware of Cyanogen MOD 10 but before that you will have to go through the express pre requisites followed by which in the next page we have summed up a detailed guide on how to apply this update.

Caution: This update is strictly for the I747 Model only and not for the devices which have different model numbers. You can get the model number info from the “Settings > About Phone > Model Number”. This should not be applied to the I9300 model.

All the data in your I747 Galaxy S3 smartphone should be backed up 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


Minimum battery left in your Galaxy S3 I747 should be at least 50% so as to make sure that it doesn’t get turned off in the middle of firmware update. Disable all the antivirus suites in your computer and in your device. Download “ROM Manager” app from the Google PLAY Store and flash the clock work mod recovery.

Also, you will have to check on whether your phone is rooted or not with the application of “Root Checker” application. If it’s rooted then you will get the notification that the device is rooted. If it’s not rooted then you will have to root the same.

Disclaimer: It will be solely your responsibility if any damage happens to your device caused due to not following of the instructions mentioned in this article. We should not be held responsible or liable for any damage done which is highly not possible if you follow all the instructions.

Please be informed that once the device is rooted, the warranty will get void. The only way with which the warranty can be restored is by re applying the official firmware update.

About Pradeep Neela

Friends call him Droid Geek because he tries out different ROM’s everyday and helps droid users experience better features on their devices. Add +Neal Pradeep on Google Plus for more Updates.