N900AUCUDNL1 AT&T Galaxy Note 3 SM-N900A 4.4.4 KitKat Update Stock ROM

Android 4.4.4 KitKat firmware build version N900AUCUDNL1 for AT&T Galaxy Note 3 (SM-N900A). The N900AUCUDNL1 is update from previous Android 4.4.2 N900AUCUDNJ5 and N900AUCUCNC2 which adds-up a system stability improvements and more handful new features (read the changelog). Since the N900AUCUDNL1 is now an Android 4.4.4 KitKat based which might probably the last KitKat firmware have had to released on AT&T Galaxy Note 3 before the upcoming Android 5.0 Lollipop update. So for those advanced users that might need the N900AUCUDNL1 stock ROM which has been useful to completely unroot and return back their devices to a 100% stock official firmware. Whilst others might hardly needed it for fixing unwanted soft-bricks while modding, but ended-up in any issues such as bootloops, and just stuck at welcome screen logo. So this is the right files that might fix your phone in times when you are desperate enough looking for the right solution to fix and unbrick your bricked Galaxy Note 3 SM-N900A.

Technical Details of N900AUCUDNL1

N900AUCUDNL1Device: Samsung Galaxy Note 3
Model number: Samsung SM-N900A
Android version: 4.4.4 (KitKat OS)
Baseband version: N900AUCUDNL1
Kernel version: 3.4.0-3032228
Build number: KTU84P.N900AUCUDNL1
other info:
Release date:  December 23, 2014

The N900AUCUDNL1 stock ROM below was  pulled during the released of the official OTA update on December but was just repackaged it to a Odin flashable file. It remained untouched and stays official at is was like the ones released via OTA update.

How to Manually Install-back the N900AUCUDNL1 stock ROM on Galaxy Note 3 SM-N900A

Disclaimer: This method are used by Android developers and advanced users only. If ever this is your first time heard about this procedure, please make a careful research first before proceeding. We shall not be held any responsibility if anything happens to your device from using this guide. Proceed at your own risk!

Warning! This stock ROM is only compatible for Galaxy Note 3  with SM-N900A (AT&T) specific model only. Do not ever try to use this firmware on other Samsung Galaxy Note 3 variants.


Q: Will I lose root once installed the N900AUCUDNL1 stock ROM?
A: Yes, this will restore your device into the official firmware.
Q: Can I install root on N900AUCUDNL1 KitKat version?
A: Yes, this firmware build can be rooted.  Also be aware about the new KNOX security platform hidden inside the system that completely voids the warranty of your device once gets tripped by means of rooting or installing any custom recovery. This sets “KNOX warranty Void: 0×1 from 0×0″ (You can see this when you set your device in download mode). This cannot be reverse back.

Download the original N900AUCUDNL1 Stock ROM/Firmware:

Important Note: DO NOT INSTALL the N900AUCUCNC2  stock ROM for downgrading purposes on-top of any latest updates, including the Android Lollipop updates that might arrive very soon. Whilst at-least you knew exactly what you are doing then it’s up to you.

Single N900AUCUDNL1 stock firmware packaged
Full single tarball – N900AUCUDNL1_N900AATTDNL1_N900AUCUDNL1_HOME (link)

Individual N900AUCUDNL1 stock firmware consists of AP, Boot, CSC, and AP packages.
BL_N900AUCUDNL1_CL3032228_QB3188679_REV03_user_low_ship (link)
AP_N900AUCUDNL1_CL3032228_QB3188679_REV03_user_low_ship (link)
CP_N900AUCUDNL1_CL3032228_QB3188679_REV03_user_low_ship (link)
CSC_ATT_N900AATTDNL1_CL3032228_QB3188679_REV03_user_low_ship (link)


Before you proceed prepare these necessary things as follows so you will not screw-up your phone:

• Create a back-up all your personal data, like: Contacts, Messages, Applications, Pictures and Videos, so that you will not lost it just in-case something might went wrong after the update.
• Make sure that your Galaxy Note 3 battery is fully charged to ensure stability and to get rid pf power failure issues while updating.
• Close all softwares, such as KIES suite, Antivirus, firewalls, to prevent the possible conflict.
• Prepare a personal computer or laptop with Windows OS.
• Enable USB debugging mode if you are having issues connecting your device to the computer try to enable the this option. In your Samsung Galaxy Note 3, go to Settings>> About device>> then look for the firmware “Build number” and then tap that build number for around 7-times. Then hit back to Settings>> Developer option>> Enable USB.
• TURN OFF the Reactivation Lock – Got Settings>>Security>>Reactivation Lock and then uncheck the Turn Reactivation lock on. This is only needed if you already turned-it-ON, from which you cannot modify the system when it’s turned-ON.

Galaxy Note 3 reactivation lock

The Procedures:

Odin downloader – look for Odin3_v3.09 here
USB Driver – drivers are here (only needed if you haven’t installed Kies)

1) Download the firmware packages and ensure that you have installed the USB drivers first.
2) Run Odin3_v3.09 flasher program. DO NOT touch the default options such as check-marked boxes “Auto-Reboot” and “F-Reset Time” while leaving the “Re-Partition” unchecked.

3) Reboot the Galaxy Note 3 into Download Mode: Turn it Off first. Then press and hold the Volume Down, HOME and Power ON button at the same time). You will then presented into a “Warning Message” screen, just press the Volume Up to continue. Once the Android robot and a “Downloading” message appears.

4) Connect the USB data cable from Phone to PC. The ID:COM box will turn to a bluish color when the phone is properly connected and recognized with Odin.

5) Load the stock firmware on each designated slots.

For single-packed stock firmware only:  Just click on the AP button then select and load the single NC2 stock firmware packed.


N900AUCUDNL1 single firmware Odin


For loading the four individual packages: Select carefully each specific files to each designated slots in Odin such as BL, AP, CP and CSC files as it will fail if you choose the wrong ones while flashing.

BL button:
AP button:
CP button:
CSC button:

N900AUCUDNL1 individual firmware Odin


6) Lastly, tick the ‘START’ button when all is set and ready to begin flashing.

Do not disconnect nor do anything when the phone is already in flash mode. You’ll messed up the phone if you accidentally interfere the installation. Wait until a word “PASS” appears on the left side of the Odin screen, it is an indication that the installation successfully completes. (If you get failed errors, check the USB connection condition, repeat the whole process)
Wait until the phone completely reboots, then unplug it from PC.

Do full wipe data factory reset again just right after flashing. This is only optional just in-case you’ll want to get rid of lag issues after flashing. Press and hold Volume Up+ Home+Power button, then select the Wipe Data/Factory Reset, to gain a fresh firmware installed.