How to Root Samsung Galaxy Note 3 SM-N900A (AT&T) N900AUCUBMI1

We have now a root method that works on AT&T Galaxy Note 3 SM-N900A. This root method is brought to you by designgears and  Chainfire, XDA’s  top-notch and highly recognized developers.  It is dubbed with a code-named ‘Root de la Vega’ named after Ralph de la Vega, CEO of AT&T Mobility, according to designgears. The firmware build used on this process is the N900AUCUBMI1 and it has been accomplished by ‘hex editing the system image to call a script on the sdcard as root’,  the developer added.

We include the build number N900AUCUBMI1 on the title  as our standard posts procedure since the rooting process might be quite different on other builds or any future updates. The files used on each build might changed sooner or later, so again the build number is N900AUCUBMI1 for now, and not with the N900AUCUBMI9 build, this means if you already received an update but you want root, you  don’t have any other choice but to downgrade back from previous UCUBMI1 firmware.  But soon there will be an updated version if the developer himself  can get an access to the needed firmware file for AT&T Samsung Galaxy Note 3 N900A.

How to Root the Samsung Galaxy Note 3 SM-N900A procedures:

For a quick guide and more detailed info how possible this root method successfully created for Samsung Galaxy Note 3 SM-N900A just head-over to XDA-developers original thread. You can also read from the top-to-bottom of the whole thread on how this root method has worked and what are the possible issues and other causes once you root your AT&T Samsung Galaxy Note 3 SM-N900A.   Below is the step by step  process intentionally created for beginners that shows  the rest of the process on how to root the Samsung Galaxy Note 3 SM-N900A.

Disclaimer: Rooting voids the warranty of your device, the developer of this rooting process including us shall not be held responsible if any undesired outcomes happens to your device. Please proceed at your own risk!

Warning: This root method will only work and can only be used on AT&T Samsung Galaxy Note 3 with specific model number SM-N900A. DO NOT ever use this root method on other carrier variants, including the international Galaxy Note 3 variants SM-N900 and SM-N9005.  Do not ever attempt to play around, or you may end-up a hard-bricked device. You are being warned, don’t blame us!

Download the necessary files  to root the Samsung Galaxy Note 3 SM-N900A

Download
FILENAME: Root_de_la_Vega.7z
SIZE: ~2.20 GB
MD5: FBCC671D7D56ECEC0CC721F88AB6CDB8
Mirrors
Google Drive

Download Odin3_v3.09 flasher tool Download
Download Samsung Galaxy Note 3 USB driver Download (Not necessarily if you’ve already installed Kies in your computer,  we only need the USB Driver).

Step 1: Prepare these Rooting things as follows

Make sure your AT&T Samsung Galaxy Note 3  SM-N900A is fully charge before proceeding into rooting. You are about to flash a hefty large root files here, a power failure may result to unwanted bricks in no time.
Make a back-up copy of all of your important data files stored from the device, including contacts, messages, call logs, photos, videos, apps and etcetera.  All files will be deleted during the rooting process.
Install the USB Driver from download link above if you have not yet installed Kies in your computer, by simply run the (Samsung_Mobile_Phones_USB_Driver_1.5.27.0.exe) then restart your computer once finished the installation.
Unzip or extract the downloaded files, you may use, 7zip, winzip, winrar or any unzipping program in your computer.
Enable USB debugging mode in your Samsung Galaxy Note 3, head over to Settings>> About device>> then scroll down to the firmware build number and then tap that build number 7-times until a message pop-ups that says something “congratulations you are now a developer”.

Step 2: Run and Flash the N900AUCUBMI1 Bin file

Unmount the external micro SD-card if you have any, simply hit your device Settings, then tap unmount SD card.
Reboot your AT&T Galaxy Note 3 into Download Mode: Turn it off, then once it is completely shut down. Press the Volume Down+Home+Power keys at same time, you will then prompted into a warning screen that let you choose to continue or cancel. Hit the Volume Up to continue into the download mode screen.
samsung galaxy note 3 download mode -androidayos
Run the downloaded and already unzipped N900AUCUBMI1_OneClickBin.exe file in your computer. This will show you a customized Odin3_v3.09. Then connect your AT&T Galaxy Note 3 to the computer, the customized Odin3_v3.09  should turn into a yellow color that tells you the USB port number from where the device is being connected and it also says something like ‘added’ in the log-cat box.

Root ATT Samsung Galaxy Note 3 SM-n900A
Now, fire-up that “Start” button to begin flashing.
Once it has completed flashing, wait until your Galaxy Note 3 completely reboots. Disconnect your Note 3 from the computer.

Step 3: Flash the Root file

Run the Odin3 v3.09.exe  in your computer.
In Odin options, make sure the “Re-Partition is unchecked. Leave Auto Reboot and F. Reset Time checkboxes are checked.
Reboot the Galaxy Note 3 into download mode again. Hold down the three keys Volume Down, Home and the Power button simultaneously same as sample photo above steps to get into the download mode screen.
Connect your Galaxy Note 3  to the computer via USB cable. You should see that in Odin ID:COM bar will then turned into blueish color the and it says “Added!!”. If  Odin doesn’t respond once the device is plugged-in, just check for possible issues like re-installing the USB driver and or checking the USB cable.
Click the AP Button,then browse to the folder where the Root_de_la_Vega.tar  file location, tick the file to load it in Odin.
Now, simply Hit the START button to begin the root process on your AT&T Galaxy Note 3.
Wait again until it finishes or until you’ll see a word “PASS!” displays in Odin and then let the device completely reboots. Then unplugged the AT&T Galaxy Note 3 from the computer.

Finalizing Step to completely root the AT&T Galaxy Note 3 SM-N900A

Head back to your computer, unzip or extract the Root_de_la_vaga.zip file. You will then see two different files:
root_files
root_de_la_vega.sh

Root_de_la_vaga root file for AT&T Galaxy note 3 SM-N900A

Now copy the two files (root_de_la_vega.sh and root_files) to your Galaxy Note 3 internal SD-card. You should put it in the root directory of the SD card. Once copied, reboot your Galaxy Note 3 in normal mode.
Once your Galaxy Note 3 completely restarted, locate the two files (root_de_la_vega.sh and root_files) you’ve previously copied in the SD card then delete both. Then restart your Galaxy Note 3 again, then that could be the last step on this rooting process.

You should then now have a rooted AT&T Samsung Galaxy note 3 SM-N900A, you may the check and confirm if the SuperSU apps was successfully installed by heading to your apps drawer. You may also then restore back your back-up files and re-insert back the external SD card.

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