Galaxy C9 Pro is an appealing smartphone with decent, to high-end performance and with a premium design. However, its default Android OS is outdated considering that Android Marshmallow is running above all. Anyway, don’t worry as Samsung will soon release official OTAs for the Galaxy C9 Pro in order to keep everything safe, secured and of course updated. And you must be prepared for the update process or else you might end up in being stuck on the Marshmallow platform.

The stock Android OS can be installed on the Samsung Galaxy C9 Pro in different ways. You can receive the OTA automatically and install the firmware by following on-screen prompts, you can download the OTA and flash it manually through stock recovery mode, or you can download the full firmware package and manually install it through Odin. Well, all these processes will be explained and detailed during the following guidelines. The goal is to learn how to successfully install the stock Android OS on your Samsung Galaxy C9 Pro.

All procedures explained during this tutorial are supported by Samsung and by Google. You will be using only official updates and not custom ROMs. So, Samsung KNOX won’t get tripped while you apply the following steps. Shortly, you won’t lose your phone’s warranty so from this perspective you have nothing to worry about. Additionally, you won’t have to use third party apps or similar risky software for completing these update guidelines.

Your data should be also secured – only in extremely rare situations you can end up in losing personal files while applying official updates. So, a backup isn’t implied, though I still recommend it – that’s the only way in which you can prevent any possible further problems. On the Samsung Galaxy C9 Pro the backup can be easily completed and in the end you can quickly save your contacts, call logs, texts, images, videos, audio files, market apps, internet settings, saved passwords, the EFS folder or IMEI / NVRAM data.

As you will see, manually installing the stock Android OS will restore your Galaxy C9 Pro back to its default state. So, if you previously tweaked your device now you will lose root access, reinstall the stock recovery, relock the bootloader and reinstall bloatware and similar other default features, apps and processes.

But, restoring your device back to stock can be used in your advantage especially if you are currently dealing with software related problems. Yes, that’s right; flashing the official Android OS can help you fix software problems such as boot loops, lags, hangs, screen freeze, battery drain, heating situations, signal strength problems, total blackouts and more.

Before choosing to apply certain update operations from this tutorial verify the power left on your smartphone. It will be important to plug in the charger if the power left will be lower than 50%. When the power is lower than the mentioned threshold your device might get turned off in the middle of the update operation. And, in that particular case your device might get soft bricked.

How to Install Stock Android OS on Samsung Galaxy C9 Pro

Receive and apply OTAs

You can receive an OTA (over the air update) only if your Samsung Galaxy C9 Pro is already running on stock Android OS and only if root access wasn’t ensured. Otherwise you will have to manually install the full firmware package through Odin.

An OTA is received in form of a notification. All you have to do from that point is to tap on the notification and to follow on-screen prompts. The update will be automatically installed. However, if you know that an OTA has been made available for your phone but the notification is nowhere to find, don’t panic; you can try to force it down by following:

  1. Power on your device and enable a Wi-Fi connection.
  2. Tap on Menu and go to Settings.
  3. From Settings choose About Phone and go towards Software version.
  4. There you should be able to access a search engine which will look for possible updates.
  5. Run this search and if an update package is displayed, tap on it and choose to install the new firmware.
  6. Again, just follow on-screen prompts – do note that your phone might reboot its Android system several times during the update operation (that’s a normal thing).

Download the OTA and flash it manually

If you cannot force down the OTA but you can download it from online sources, you should follow this update section instead.

By using the steps from this section you can learn how to manually update your Samsung Galaxy C9 Pro by using the same OTA package – not the full ROM firmware file. So, once more, your device must already run on stock Android OS and root access shouldn’t be ensured.

Manually applying the OTA can be done in two different ways; choose the method that you prefer the most:

  1. Download the OTA file for your Samsung Galaxy C9 Pro on your computer – yes, a computer is required on this update process.
  2. Then, connect your phone with your computer with the help of its USB cable.
  3. Select the downloaded update file and transfer it on your handset.
  4. Remove the USB cable when done.
  5. Switch off your device and then enter recovery mode on your Android device: press and hold the Power, Volume Up and Home buttons.
  6. From recovery select Install zip from SD card.
  7. Load the software package and resume the flashing process.
  8. Reboot your phone when done.

Another way in which you can flash the OTA is by adb sideloading the firmware:

  1. On your computer install the Samsung Galaxy C9 Pro drivers.
  2. On the same computer install Android SDK: learn how to install Android SDK on Windows or how to set up ADB on MAC OS X / Linux.
  3. Next, download the OTA file on your computer.
  4. Rename the update package into ‘’ and transfer the renamed file inside the Android SDK folder.
  5. From there open a cmd window: press and hold the Shift keyboard key and while doing so right click on any blank space; finally choose ‘open command prompt window here’.
  6. In the cmd window enter: ‘adb sideload’.
  7. Wait while the firmware is installed and then reboot your phone.
  8. Enjoy.

Manually install the stock Android OS using Odin

As already mentioned, if the full firmware package can be downloaded then you can use Odin for flashing it on your Samsung Galaxy C9 Pro. Odin is an official program developed by Samsung and used especially on update types of procedures.

The best thing is that this particular update process can be successfully completed even if your smartphone was tweaked – so you can update to latest Android release even if root access is ensured or if the bootloader is unlocked. Unfortunately, once the update is applied all the tweaking procedures will be revoked.

As already outlined, it’s unlikely to lose your data but, while using Odin your files might get corrupted. So, a good idea will be to sync your data with your Google Account, to use built-in cloud storage platforms or any other similar backup and restore solutions before doing anything else.

Now, let’s see how Odin can be used for completing an update / downgrade operation:

  1. On your computer download Odin. Unzip the downloaded file and install the program on your computer by following on-screen prompts.
  2. Then, download the stock Android firmware for your Samsung Galaxy C9 Pro – you can download the firmware from Sammobile, from, from Samsung’s official website or from any other source you prefer. You can save the update package on desktop.
  3. Don’t forget to install the Galaxy C9 Pro drivers before doing anything else – you can do that by using the Samsung KIES toolkit.
  4. Run Odin on your computer and meanwhile enter download mode on your smartphone: power it off and then press and hold Power, Volume Down and Home buttons at the same time.
  5. In the end connect your C9 Pro with your computer with the help of the USB cable.
  6. On Odin you have to receive the ‘added’ message and the ID:COM field is turned yellow or blue. If that’s not happening, you should reinstall your phone’s drivers before repeating the steps from above.
  7. Next, from Odin click on the AP option and load the firmware package.
  8. Make sure you don’t check the Auto Reboot option and the Re Partition feature.
  9. Click on Start when done; wait while the stock Android OS is being automatically flashed on your Samsung Galaxy C9 Pro.
  10. You can unplug the USB cable and close Odin. Also, reboot your device.
  11. If Odin gets stuck during the flashing process: close the program, remove the USB cord, force restart your Samsung Galaxy C9 Pro, reinstall your phone’s drivers on your computer and repeat the steps from above.
  12. If your handset will get stuck in a boot loop (that can happen on the last reboot) you need to: go to recovery mode (press and hold Power, Volume Up and Home buttons) and initiate a hard reset and clear app data cache – just select “wipe data factory reset” followed by “wipe cache partition”.

There you have it. That’s how you can install the stock Android firmware on the Samsung Galaxy C9 Pro. If using the stock OS is just not for you and if you want to test something new, something better you should choose to install a custom ROM software such as Lineage OS, AOKP or Paranoid Android. In that case you will be able to choose an Android 8.0 Oreo based platform. However, if you choose to flash a custom ROM you will lose your phone warranty. So, choose wisely and try to keep everything safe and secured all the time.

If you need further assistance on the update process, don’t hesitate and contact us. Also, stay close as we will show you further Android related tips, tricks and tutorials available for your Samsung Galaxy C9 Pro. For getting in touch with us you can use the comments field from below. Enjoy.

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