If you are staying in the United States of America, then you must have heard about AT&T Samsung Galaxy S5 SM–G900A. This is a popular smartphone among American smartphone lovers. Big screen is the main reason behind the popularity of Galaxy S5 SM–G900A. The South Korean company Samsung has also added 16MP camera in this phone. If you are using AT&T Samsung Galaxy S5 SM–G900A, then I am going to share some good news with you. Android 4.4.2 KitKat UCU1ANCE has been released for your AT&T Galaxy S5 SM–G900A. In the previous article, I have posted the steps for updating Samsung Galaxy S5 SM-G900F to KitKat XXU1ANE2. Now you can update AT&T Samsung Galaxy S5 SM–G900A to Android 4.4.2 KitKat UCU1ANCE.

This is really a great news for the people who are staying in the United States and using AT&T Samsung Galaxy S5 SM–G900A. You can experience the improvement on your AT&T smartphone after installing the new official firmware. You can use the 16MP camera of this phone to take stunning photos. It is not required to install CWM recovery on your AT&T Galaxy S5 SM–G900A before updating it to KitKat UCU1ANCE. The good news is that you can easily root AT&T Samsung Galaxy S5 SM–G900A after updating it to the new firmware. You must backup your photos, videos and other data available on your AT&T Galaxy S5 SM–G900A before installing KitKat UCU1ANCE. AT&T Samsung Galaxy S5 SM–G900A USB driver need to be installed on your PC for successful connection between your AT&T smartphone and PC.

You can follow the steps posted below to install KitKat UCU1ANCE on your AT&T Samsung Galaxy S5 SM–G900A. Androidbiits will not be responsible if your AT&T Galaxy S5 SM–G900A got corrupted during the update process. The battery level of your Galaxy S5 SM–G900A must be above 95% before following these steps.

How to Install Android 4.4.2 KitKat UCU1ANCE on AT&T Samsung Galaxy S5 SM–G900A

1. First you have to download Android 4.4.2 KitKat UCU1ANCE on your PC.

2. Now you must download Odin.

3. Now you have to put your AT&T Samsung Galaxy S5 SM–G900A into download mode using these steps:

• Turn off your AT&T Galaxy S5 SM–G900A.
• Push the volume down button and home button of your AT&T Galaxy S5 SM–G900A simultaneously.
• Press the Power button of your AT&T Galaxy S5 SM–G900A at the same time while pressing the Home button and volume down button.
• After a few minutes you will be able to see a warning message on your AT&T Galaxy S5 SM–G900A. Press the Power button again after viewing this warning message to put your S5 into download mode.

4. Launch Odin on your PC and connect your AT&T Samsung Galaxy S5 SM–G900A with your PC via USB cable.

5. You can see a message in the bottom left corner of Odin after connecting your AT&T Galaxy S5 SM–G900A with your PC.

6. Now you have to extract the ZIP file of Android 4.4.2 KitKat UCU1ANCE on your PC downloaded in STEP 1.

7. Once you have successfully extracted the ZIP file of KitKat UCU1ANCE, you have to press “PDA” in Odin and choose “.tar.md5″ file.

8. Now you have to press “PDA” in Odin and choose “modem” file.

9. Now you have to press “CSC” in Odin and choose “csc” file.

10. Press “PIT” in Odin and choose “.pit” file.

11. Now you have to press the “Start” button in Odin after selecting “Re-Partition” and “Auto-reboot” options.

You will have to wait until your AT&T Samsung Galaxy S5 SM–G900A restarts. It may take around 5 minutes to reboot. Once your 5.1 inch AT&T Android smartphone is restarted, you can enjoy KitKat UCU1ANCE firmware on your S5 SM–G900A. If you are facing any difficulty while installing KitKat UCU1ANCE firmware on your AT&T Galaxy S5 SM–G900A, then you can share your difficulty with me in the comment section.