G935AUCU4BQA6 Nougat Firmware on AT&T Galaxy S7 edge SM-G935A

If somehow you cannot upgrade your AT&T Galaxy S7 edge SM-G935A to the official Android 7.0 Nougat Update G935AUCU4BQA6 via Over-The-Air then this guide is made out for you.  The best way for you to get the Nougat update on your device is to sideload the stock G935AUCU4BQA6 either via ADB or right thru the SD-card update in Recovery mode.

  • Android version: 7.0
  • Baseband version: G935AUCU4BQA6
  • Kernel version: 3.18.31-10280464
  • Build number: NRD90M. G935AUCU4BQA6

To sideload the Nougat G935AUCU4BQA6 firmware, your device must recently running with the last released version of Android 6.0.1 Marshmallow build version G935AUCS4APK1.
Check your device first, just simply head on to your device Settings > about Device. See if it’ll meets the criteria such as follows:

  • Android version: 6.0.1
  • Baseband version: G935AUCS4APK1
  • Kernel version: 3.18.20-9439621
  • Build number: MMB29M.G935AUCS4APK1

Download Nougat OTA Update G935AUCU4BQA6:

If your device is not on G935AUCS4APK1, you may need to install the stock firmware itself first using Odin. Just read on Odin instructions here.

Download Marshmallow Stock Firmware G935AUCS4APK1:

Prerequisites:

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

Backup all your personal data – Use “Samsung Smart Switch for PC (Google it) to easily make a backup of your Contacts, Messages, Applications, Pictures, and Videos, so that you will not lose it. You must do this because the recent firmware packages will wipe out your device stored data.

Recharge the device battery – Make sure that your Galaxy S7 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.

Install Nougat OTA Update G935AUCU4BQA6 via SD-Card in Recovery Mode

Step 1: Rename the firmware file to Update.zip

Right click the downloaded G935AUCU4BQA6 Nougat firmware file and rename it from “SS-G935AUCS4APK1-to-U4BQA6.zip” to “Update.zip”. Then copy the “Update.zip” file on the root directory of your phone’s SD-Card.

Step 2: Reboot the device in Recovery Mode

Power down the phone first. Then press and hold down Volume Up + Home + Power at the same time until it shows you the Android robot, and then comes up with recovery mode screen.

Step 3: Install update from SD card

Toggle down and select “Apply Update from SD card” using the volume buttons and select using the power button.

Step 4: Wait until the phone reboots

Just wait until the installation completes. The phone may reboot once or thrice and it may take up around 30 minutes or more.

Sideload Nougat OTA Update G935AUCU4BQA6 via ADB

Step 1: Install the ADB tool and the necessary drivers

Right click the downloaded firmware file and rename it from “SS-G935AUCS4APK1-to-U4BQA6.zip” to “Update.zip”. Then copy the “Update.zip” file on the root directory of your phone’s SD-Card.

Step 2: Reboot the device in Recovery Mode

Power down the phone first. Then press and hold down Volume Up + Home + Power at the same time until it shows you the Android robot, and then comes up with recovery mode screen.

Step 3: Apply Update via ADB

Toggle down and select “Apply Update via ADB” using the volume buttons and select using the power button.

Step 4: Rename the file

You may firs rename the G935AUCU4BQA6 file, so it’ll be easier for you to remember the name of the file. Example: from SS-G935AUCS4APK1-to-U4BQA6.zip” to juts “Update”.

Step 4: Execute ADB command line

Head over to the ADB folder (you may find it in the PC’s local disk drive). Now hold SHIFT + Right mouse click and choose “Open command window here”.

Then simply type the command line “adb sideload update” 

Step 4: Wait until the phone reboots

Just wait until the installation completes. The phone may reboot once or thrice and it may take up around 30 minutes or more.

Instructions for Installing G935AUCS4APK1 Marshmallow Firmware Prior to Nougat Update G935AUCU4BQA6

The device must necessarily runs in the last Marshmallow version G935AUCS4APK1, so you can update to the Android Nougat G935AUCU4BQA6. Just follow the step by step procedures below, then once you finishes refer back the sideloading the Nougat firmware (instructions above).

Grab these necessary tools

  1. Odin3_v3.11.1 downloader or the latest version – This is best for flashing the Android 6.0.1 Marshmallow 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. Use any decompressing program you have had in your computer.

Reboot the Galaxy S7 into Download mode

Reboot the Samsung Galaxy S7 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. If you can’t get into it, repeat the 3-button combination again and again.

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.

Add the firmware binary files to their designated slots in Odin such as: the “BL” (bootlooder) file goes to the “BL button/slot“, same goes about the “AP” (phone), “CP” (modem) and the “CSC” (consumer code) files. Once loaded, you need to wait for a while as Odin3 will check the files compatibility and authenticity.

  • BL_G935AUCS4APK1_CL9439621_QB11452742_REV02_user_low_ship_MULTI_CERT.tar
  • AP_ G935AUCS4APK1 _CL9439621_QB11452742_REV02_user_low_ship_MULTI_CERT.tar
  • CP_G935AUCS4APK1_CL9439621_QB11452742_REV02_user_low_ship_MULTI_CERT.tar
  • CSC_ATT_G935AATT4APK1_CL9439621_QB11452742_REV02_user_low_ship_MULTI_CERT.tar

Connect the Galaxy S7 into the computer

Connect the Galaxy S7 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 the stock firmware

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

Wait until it says Pass!!

Odin3 will display a message that says “PASS!” when the process finishes. Wait until the phone completely reboots, then unplug it from the computer. However, if you might get the error message “FAILED!” you may check the troubleshooting procedures down below.

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