Saturday, November 14, 2015

Install N910AUCU2DOI2 AT&T Galaxy Note 4 SM-N910A Official Android 5.1.1 Firmware

Stock Firmware build version N910AUCU2DOI2. This is AT&T Samsung Galaxy Note 4 SM-N910A official Android 5.1.1 update released in the month of October 2015. The N910AUCU2DOI2 will not only bump up the Galaxy Note 4 N910A to Android 5.1.1 but it also contains some security updates to address the recent Android vulnerability and brings along a lot more improved performance.

The N910AUCU2DOI2 is the first Android 5.0.1 Lollipop built so far for AT&T Galaxy Note 4 SM-N910A. However, those who might have a rooted and a modified AT&T Samsung Galaxy Note 4 SM-N910A and might have missed the update via OTA. Perhaps, you might need the N910AUCU2DOI2 stock firmware itself. This is very useful if you might need to unroot the device and returned it back to official Android 5.1.1 firmware build N910AUCU2DOI2.

Technical Details of N910AUCU2DOI2 5.1.1 Update:

N910AUCU2DOI2 ATT galaxy Note 4
Device: Galaxy Note 4
Model number: SM-N910A
Android version: 5.1.1
Baseband version: N910AUCU2DOI2
Kernel version: 3.10.40-5613584
Build number: LMY47X.N910AUCU2DOI2

Changelog of N910AUCU2DOI2

  • Android OS 5.1.1

  • Improved perfromance

How to manually restore the AT&T's Samsung Galaxy Note 4 SM-N910A to Stock Android 5.1.1 N910AUCU2DOI2

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 plunging in. We shall not be held any responsibility if anything happens to your device from using this guide. Proceed at your own risk!

Frequently Asked Questions About Stock Firmware:

Q: When do we use the stock firmware?

When it happens that you try to perform a software update then receive an error that reads something like The operating system on your device has been modified in an unauthorized way. That simply means that the device could not get the software update anymore. So the best shot here is you need to remove root from the device by flashing the stock firmware.
Q: Will I lose root once installed the N910AUCU2DOI2 Lollipop 5.1.1 firmware update?

If your device is currently rooted you will lose root after flash, but you can still root it again if you want.

Q: Will this method triggers KNOX Warranty counter to 0x1?

No, this is an official and signed Android 5.0 Lollipop firmware released by Samsung, so flashing official firmware will not harm KNOX warranty void flag.

Disclaimer: Use of this method is solely at your own risk! Please proceed with precautions, for we will not take any responsibility if anything happens to your device by using this guide.


Before you proceed prepare these necessary things as follows so you’ll not screwed-up your phone:

  • Create a backup all your personal data, like Contacts, Messages, Applications, Pictures, and Videos, so that you will not lose it just in case something might go wrong after the update.

  • Make sure that your  Samsung Galaxy Note 4 SM-N910A battery is fully re-charged to ensure power stability and to get rid pf power failure issues while updating.

  • Prepare a PC, this will not work on MAC.

  • Enable USB debugging mode if you are having issues connecting your device to the computer try to enable this option. In your AT&T Samsung Galaxy Note 4 SM-N910A, go to Settings About device > then look for the firmware build number and then tap that build number for around 7-times. Then hiot back in Settings > developer option, then tick the box that says USB debugging mode.

  • TURN OFF the Reactivation Lock – from Home screen, tap on 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. You may just then re-enable once the installation has made.


Stock Firmware N910AUCU2DOI2 5.1.1 Download (this is the untouched, unmodified, and stays 100% original firmware package, directly pulled from OTA update)
Odin downloader – Use Odin3_v3.10.6 here
USB Driver – drivers are here (only needed if you haven’t installed the latest Kies 3 yet)
Important Note: This stock firmware build can only be and to be use to unroot and manually update the Galaxy Note 4 SM-N910A on top of an older software update. You should not use the firmware for downgrading purposes, including but not limited to such as much higher and latest than N910AUCU2DOI2 and future Android 5.1.1 Lollipop updates. Doing so may result into undesirable outcomes due to the new secured operating system. This specified stock firmware or so-called stock ROM is only compatible for Samsung Galaxy Note 4 SM-N910A (AT&T) specific model only. Do not ever try to use this firmware on other Samsung Galaxy Note 4 variants, including other brands and model numbers.

Extract/Unzip the stock firmware

Extract the downloaded N910AUCU2DOI2 firmware. Use any decompressing program you have had in your computer.

Run and Configure Odin. Run Odin3_v3.10.6 flasher program. In Odin window DO NOT tick the option box that says ‘Re-Partition’. Leave ‘Auto Reboot’ and “F.Reset Time” check-marked by default.

Load the N910AUCU2DOI2 stock firmware. The N910AUCU2DOI2 fulls stock is composed of 4 individual packages.
You may try to load the 3- files first and see if it it'll work. The BL, CSC, and the CP. You may only use the AP file alone if ever the three files won't worked it out. Noting that the size of this specific file causes you some headache to download.

N910AUCU2DOI2 Stock Firmware

  • In BL button load the BL_N910AUCU2DOI2_User_low_ship.tar.md5

  • In CP button load CP_N910AUCU2DOI2_User_low_ship.tar.md5

  • In CSC button load CSC_N910AUCU2DOI2_User_low_ship.tar.md5

Once the three files is loaded you need to wait for a while as it reads out the MD5 checksum for compatibility.

Reboot the Galaxy Note 4 into Download Mode. Reboot the Samsung Galaxy Note 4 SM-N910A  into Download Mode: Turn it Off first. Now 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.

Connect the Note 4 to PC. Connect the Galaxy Note 4 to the computer using the supplied USB data cable. In Odin window, the ID: COM box will turn to a bluish color when the phone is properly connected and an indication that its recognized with Odin. It also states as “Phone Added! in the log cat.

Start on flashing the N910VVRU2BOG5 stock firmware. Once you are ready to fire-up, hit the “START” button in Odin to begin flashing the stock ROM. Do not ever interrupt the phone while already in flashing progress, like disconnecting the cable or turning off the device. Just wait until it completely finishes.

Wait until you see the PASS!! message. When the Stock Firmware installation successfully completes, you will then see a word “PASS” in Odin. This indicates that the flashing already finishes, and on the log box it says “All threads completed (succeed 1 / failed 0)”. The phone will just then automatically reboot, then it’s about time to remove it from PC or laptop USB connection.


How to get rid of lag issues and achieved a more stable Android 5.1.1 Lollipop on your Galaxy Note 4.

Some folks might miss this part, then there goes this lag problem here and there. This will also affect the battery life performance. So it is much better to perform a full wipe and factory reset once before and after flashing a stock firmware. This will not just avoid getting into any issues, but you can also achieve a cleaner and fresher firmware installation. Just do make sure you all important data has a backup copy and already saved in a safe place before doing this. This process does not cover on any outdated apps that cause incompatibility issues on Android 5.0 Lollipop OS, all you need is find any updates on that particular apps to fixed any issues.

Performing Full Wipe Data/Factory Reset on Samsung Galaxy Note 4 in Recovery Mode

  1.  Press and hold Volume Up, Home and Power button.

  2. Use volume keys to select, Up and Down and Power or Home key to select the option.

  3.  Select Wipe Data/Factory Reset using the Home button.

  4. Next select the “Wipe Cache Partition”.

  5. Lastly, select “Reboot System Now” to reboot your Samsung Galaxy Note 4 N910A.


  1. Is it possible to give an alternative source for stock N910A -N910AUCU2DOI2 files as the link shared to Mega is inaccessible?

  2. It's working fine.. You may just simply enter the decryption key.