Sunday, December 25, 2016

N910AUCU2EPK1 AT&T Galaxy Note 4 SM-N910A Official Android 6.0.1 Marshmallow Firmware

AT&T Galaxy Note 4 (SM-N910A) has been upgraded to Android 6.0.1 Marshmallow. These updates were officially rolled out Over-The-Air and thru Samsung Smart Switch for PC. However, those with modified and rooted devices will no longer received the update at the right moment of its release period. To those who may not it know  yet, that a rooted and modified phones has lost its warranty and the privileges to get the official support from the dealer. Therefore,  the only way out to install the most latest update is by using the stock firmware.

Marshmallow Updates on AT&T Samsung Galaxy Note 4 SM-N910A

  • 1-12-2016 –  OTA update N910AUCU2EPK1 release. It contains November Android security patch.

  • 27-10-2016 – OTA updates rolling out to build version N910AUCS2EPH7. October Security update is also added. This update has "bootloader" locking mechanism that prevents advanced used to return back to an older version.

  • 8-9-2016 –  First Android Marshmallow OTA Updates rolling out dubbed as build version N910AUCU2EPH5. It also includes the August Android Security patch.

Download the Stock Firmware:

Android Marshmallow Firmware for Galaxy Note 4 SM-N910A
Important Note: This stock firmware can be use only on top of any older software updates. You should not use the stock firmware for downgrading purposes on top of any newer software updates. Doing so may result into undesirable outcome 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.


How to Restore Back AT&T Galaxy Note 4 SM-N910A to Official Android Marshmallow Firmware

Disclaimer: This method is 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 you proceed. We shall not be held any responsibility if anything happens to your device upon using this guide. Proceed at your own risk!

Frequently Asked Questions About Stock Firmware:

When do we use the stock firmware?

When it happens that you try to perform a software update then gets an error message that says “The operating system on your device has been modified in an unauthorized way. Try downloading software updates using Samsung Smart Switch on your PC or visit a customer service center”.

That simply means that the device could not get the software update anymore. So the best thing you’ll need to do is by removing the modified system image that has been installed in your device. And installing back the stock firmware itself.


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

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.

Recharge the device battery – Make sure that your Galaxy Note 4 battery is fully recharged to ensure its stability. A power failure during the installation process may harm your device.

• Prepare a PC as this process will not tend to work in Mac computers.

Enable OEM unlocking mode – This thing wan’t there before during the old times, but if this feature is already enabled in your device.  Just go to Settings > About device > then look for the firmware’s Build number and then tap that build number for around 7-times until a message pop-up that says something like “Congratulations you are now a developer!”. Then hit back in Settings > About device > Developer option > OEM Unlocking.

Enable USB debugging mode if you are having issues connecting your device to the computer try to enable this option.go to Settings > About device > Developer option > USB debugging.

TURN OFF the Reactivation Lock – This also necessarily needed if your device already have this feature. This is only needed if you already turned it ON, from which you cannot modify the system when it’s turned-ON.

To do this just got to Settings > Security > Reactivation Lock, and then uncheck the Turn Reactivation lock on.


Grab these necessary tools

  1. Odin3_v3.11.1  downloader –  Use for flashing the Android 6.0.1 stock firmware

  2. USB Driver – only needed if you haven’t installed the latest Samsung Smart Switch in your PC.

Extract/Unzip the download stock firmware

Extract the downloaded firmware or stock ROM. Use WinZip, 7zip, Winrar or any decompressing program you have had in your computer.

Run and Configure Odin3 Flasher

Run Odin3 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.

Just click on the AP button then select and load the stock firmware.
It reads out something like this: (N910AUCU2EPH5_N910AATT2EPH5_Home.tar.md5)
Once loaded, you need to wait for a while as Odin3 will check the compatibility measures.

Reboot the Galaxy Note 4 in 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 your Note 4 into your computer

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 it’s an indication that it’s recognized with Odin. It also states as “Phone Added! in the log-cat.

Begin Flashing

When all is set and you are ready into flashing just simply tick the ‘START’ button located at the lower part of Odin.

Avoid Interrupting the process

DO NOT disconnect nor do anything when the phone is already in download mode and flashing status. You’ll messed up the phone if you accidentally interfere the installation process. Wait until a word “PASS” appears on the left side of the Odin screen, it is an indication that the installation successfully completed. However, if you get failed errors, check the USB connection condition, repeat the whole process or read the troubleshooting section below.

Wait until it says Pass!!

Wait until the phone completely reboots, then unplug it from the computer

Troubleshooting when firmware flashing fails

Do performing factory reset after flashing is necessary when the device previously runs on any modified ROM and unofficial firmware images?
This process is optional, but this method can get rid of the unwanted bootloop, rebooting issues, freezes and lag issues after the new firmware installation.

  • Press and hold Volume Up+ Home+Power button, then select the Wipe Data/Factory Reset, to gain a fresh firmware installed.

Odin keep on failing and I’ve tried everything from A to Z but still nothing works. What else can you suggest?

You may have attempted rolling back to an older firmware version. Noting that newer updates will not allow you to downgrade to an older firmware version.  This is why Samsung and Google frequently released the Android security patches in a monthly basis. You must carefully keep an eye of each firmware build version.

Also,  if you’ve use the stock firmware to unroot and or restoring back from a modified system images but cannot get through the during the flashing and you get Odin3 fail error, you may first sort  things out like what root kernels and custom ROM, and any modified system images you have previously used before and try to find an answer to why it causes a flashing failure. Sometimes the problem is not on the stock firmware but lies in the modified system image you’ve used before that causes the problem of not letting it through pass in Odin3.

If you have something to add and or in need for assistance, just drop it on the comment form below.


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