Here’s AT&T Samsung Galaxy S7 SM-G930A stock firmware from the official Android 6.0.1 Marshmallow to the recent Android 7.0 Nougat updates. All of these firmware build are originally pulled from OTA updates and were bundled for manual flashing purposes.
AT&T Galaxy S7 SM-G930A stock firmware packages are rarely can be found and its been very useful just in case one my needed it for fixing the device if someone messed-up from rooting and any system modification attempts.
The stock firmware can also be use to upgrade the device if you have missed the OTA updates. This usually happens if your device is outside the US territory and as it couldn’t receive the OTA updates. The stock firmware itself can fix the device if and when the device suffers unwanted soft-bricks such as bootloops, stuck at welcome screen logo due to rooting, installing custom recoveries, kernels, and custom ROM.
An Important Note Of Caution: Once your device is upgraded to Android 7.0 Nougat you cannot return back to Android 6.0.1 Marshmallow. Also, you cannot downgrade from the newest updates back to the previous released builds due to the recent Android Security Maintenance Released (SMR) to which also contains “bootloader” locking mechanism.
Android 6.0.1 Marshmallow Official Firmware
|Baseband version||Android version||Release date||Stock|
|G930AUCS4APK1||6.0.1 Marshmallow||2016 November 28||(link)|
|G930AUCS4APJ4||6.0.1 Marshmallow||2016 November 8||(n/a)|
|G930AUCS4API2||6.0.1 Marshmallow||2016 September 26||(n/a)|
|G930AUCS2APH1||6.0.1 Marshmallow||2016 August 25||(n/a)|
|G930AUCU2APG1||6.0.1 Marshmallow||2016 July 27||(n/a)|
|G930AUCS2APF2||6.0.1 Marshmallow||2016 June 17||(n/a)|
|G930AUCS2APE1||6.0.1 Marshmallow||2016 May 12||(n/a)|
|G930AUCU2APD1||6.0.1 Marshmallow||2016 April 20||(n/a)|
|G930AUCS2APC2||6.0.1 Marshmallow||2016 March 18||(n/a)|
How to Check AT&T Galaxy S7 firmware build version?
From Home screen > tap Apps > Settings > About device. This displays the build version like the ones I gathered in each and every official OTA updates.
What does the stock firmware can do?
• Manually upgrade to the latest updates if your device is brought outside the United States.
• Fix a soft-bricked phone, if you have been attempting to root but ended into rebooting problem and or was stuck at the AT&T splash screen and the worse is the battery heated up so fast. The only thing you do is flash the exactly the same build version. However, if the problem still exist then you must flash the latest one, and then forget about rooting for a while.
• Restore the phone back to official from custom or a modified firmware version like you are seeing this error message when you try to update “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”.
What does the stock firmware cannot do?
• Stock firmware should not be use to downgrade the phone.
• Stock firmware has nothing to do about unlocking the device from the original carrier and to be use for another carrier.
What firmware build version do I need?
For those who owned the AT&T Galaxy S7 SM-G930A and may just want to update manually
First up, if your device hasn’t been rooted nor modified but it doesn’t get any updates for a longer period of time and you may only want to upgrade just grab the latest build version. Some common scenario like either you’re traveling overseas with your phone or you just bought the device at an online store. Those devices will not receive an update since all of the Over-The-Air OTA updates were released inside the US territory only. You may check the firmware version of your device first, then if you see that it’s totally outdated then simply grab the latest update.
For those advanced users who have a rooted and modified AT&T Galaxy S7 SM-G930A
In the meantime, to those who got a modified or rooted firmware and just wants to restore back to stock but still have plans to root and modify the device later-on should only grab the exact the same build version. A system modification such as rooting, installing custom recovery, custom ROM, modified kernels, and other unsigned system images are very crucial into these days.
The new updates has this “bootloader” locking mechanism that prevents you to root nor modify your device again, worse is you can no longer downgrade to the older firmware version of which how your rooting method works. We’ve been here for 7 years, it is not like the same thing as before to which we are free into tinkering our devices. So be careful about of choosing the right combination of stock firmware.
Can I force to downgrade my device, and or there are any other ways to do it?
Simply NO, if you will try to do so and forces to downgrade chances are your phone will get into trouble, like ending up into a black screen, a bootloop or the phone just keep on restarting over and over again, and stuck in Samsung logo or freezes at the welcome screen. There is other ways to downgrade though, but it is extremely risky and inadvisable since it breaks some important functionality of the device like, Wi-Fi and network connectivity, camera, audio, apps and etc and that the phone is completely unusable anymore.
How to Manually install AT&T Galaxy S7 SM-G930A Stock Firmware
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.
• 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 FRP Reactivation Lock – This also necessarily needed if your device already have this feature enabled. This is only needed if you already turned it ON, from which you cannot modify the system when and if 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
- Odin3_v3.11.1 downloader or the latest version – This is best for flashing the Android 6.0.1 Marshmallow stock firmware
- 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.
In addition, in stock firmware packages you may find two CSC files. The one that says “CSC_G930A,” while the other one also says “Home_CSC_G930A“. Both were exactly the same thing and will wipe your data cache. The only differences in the configuration is that the former may include some hidden system images or it’s the full packaged, while the latter has not. That is why you should backup your important files first before flashing the stock firmware.
I highly recommended using the CSC_G930A version instead of the Home_CSC_G930A. This is the manual installation method and it’s not the usual Over-The-Air (OTA) update, which is basically we are trying to install a much cleaner and much fresher firmware. Also performing a full wipe and factory data reset is highly recommended in the process. With this, we can get rid of lag issues here and there once after the firmware installation. Have you ever encountered about the phone’s sluggish issues after a OTA update? Those were commonly caused by lack of performing a Full Wipe/Factory Data Reset once after taking the OTA update.
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.
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!!
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.
Troubleshooting if and when firmware flashing failed
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. Please check back my insights about the stock firmware above.
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 that causes the problem of not letting it through pass in Odin3.
If you have something to add and or in need for my assistance, just drop it on the comments form below.