How to Flash Stock Firmware on Samsung Galaxy A9 Star SM-G8850

Requirements for Flashing :

Frequently Ask Questions :

I can’t Flash Stock Rom on Samsung Galaxy A9 Star SM-G8850 

Samsung Galaxy A9 Star SM-G8850 doesn’t turn on, not respond to power button ( Dead/Soft Brick)

• Let’s be a little more patient. Because the Flashing process takes some time. (20min)
• If there is no progress then, download Firmware and latest Odin from another source and try again.
• If your problem persists then, please open the Help Topic with details under android in our Forum.

Samsung Galaxy A9 Star SM-G8850 Doesn’t not pass boot logo/ boot-loop

• after flashing, the Samsung Galaxy does not pass the logo and keeps restarting until the logo. That means the phone is stuck in the boot loop. so,  we have to take action for this. But is this the first time after flashing? Give it time. (20 minutes)
• If your problem persists then, please open the Help Topic with details under android in our Forum.

Samsung Galaxy A9 Star SM-G8850  continuously restarts/ keep rebooting

• Follow this Guide-line again with Fresh Firmware and Odin tool from another source.
• We also have some dedicated posts about this. you can Search them.
• If your problem persists then, please open the Help Topic with details under android in our Forum.

Phone automatically disconnecting during flashing

1. Use Different USB Port
2. After that run Odin Flash Tool as administer.
3. Make sure you have the correct driver installed
4. If the problem persists then use another PC

USB device not recognized

• This is a normal USB error and it is not related to Odin. The only thing you can do is change the USB port, try with another cable, try with another Computer.
• if you need to fix this problem first, then go to this troubleshooting guide. However, it is better to bookmark this page for future use.

Error displaying “secure check fail” / FAIL on Samsung Galaxy A9 Star SM-G8850

• won’t boot no Samsung logo just flashes in red “secure check fail Modem” then blue screen security error phone is locked

• You may try to install the wrong version. the reason is:  The mobile phone has been replaced with an incorrect ROM that is not “original/legal” for his motherboard.  So, Download Right Country, Latest Version, Right Model. If your problem persists then, please open the Help Topic with details under android in our Forum.

Samsung Galaxy A9 Star SM-G8850 “SW REV.CHECK FAIL! DEVICE: BINARY

• The Odin notification box displays a “failed” message while Odin-mode displays the message “SW REV.CHECK FAIL! DEVICE: BINARY” in the device.

• The reason is:  The mobile phone has been replaced with an incorrect ROM that is not “original/legal” for his motherboard.  So, Download Right Country, Latest Version, Right Model. This is the only one Solution for “SW REV.CHECK FAIL! DEVICE:4 BINARY3”.  – Read More – Fixing “SW REV.CHECK FAIL! DEVICE: BINARY

Screen showing a blank white screen

• This may sound scary, but it is the easiest problem that one can solve without any trouble. The problem reason is some mirror problems in primary memory. Although the whole phone works here, the screen does not work.
• Go again Download Mode and Download Firmware and latest Odin from another source and try again the above process.

Samsung Galaxy A9 Star SM-G8850 “Nand write start fail”

• Solving this bug in the Odin tool is difficult but not complicated. Nand is a non-volatile memory that stores data while the phone is off. When we install new firmware, Odin tries to write NAND, which is the first thing Odin does and this is the most important part in flashing.
• If the Odin logs are stuck at NAND Write for more than a minute or two, you can assume that there is something wrong with NAND Write that needs to be fixed. Make sure that OEM Unlocking is enabled, Use Odin version 3.13.1, try again above Process again. Read More – Fixing Nand write start fail

Can’t open the serial(com) port on Samsung Galaxy A9 Star SM-G8850

• Most probably this problem occurs due to USB driver issues.
• double-check whether you have enabled USB debugging and OEM unlock in developer options.
• Some of our users say this Custom Odin Version has helped them. try and tell us your success story.

Please get approval to use factory binary (Pit)

• Actually this is the most serious error. because Some solution works for some phones while some not. This Happen because of  new security feature in Android Stock ROMS which strictly blocks the Flashing of custom ROMs
• Use the above Patch-Odin version and Flash the Stock Firmware Again. If not help, you should extract PIT file from CSC file. after that. insert the same in the Odin by going to the “PIT” tab in the Odin and by clicking the PIT button. Keep in mind that this should be done while trying to flash with the combination firmware. If you want step by step Guide, Read More – Please get approval to use factory binary (Pit)

Complete (write) operation failed

• This is a Normal error during Flash. There could be a lot of reasons.
• Solution: So first try the above step first. If it’s not working please double-check whether you have enabled USB debugging and OEM unlock in developer options. if still not works, then use this above Custom Odin Version

Install the android version that still not officially supported on Samsung Galaxy A9 Star SM-G8850

• We know that some Samsung Galaxy devices have not yet received the latest Android Version, which also depends on the region (Samsung’s upgrade is based on region).
• Imagine that you are in Singapore and have a Pie on your device. If you want to upgrade to the latest android version and if the latest version is not supported in your country. Don’t worry. Still, you can flash the latest version, find the right model from the nearest country. Find the right Model number and flash it. (Not recommended but still working).

How to revert back to the previous version of Android

• When you flash a new custom ROM which found from the internet, you will inevitably get errors if it is still test-level. such as the camera fails, WiFi fails, the NFC Fails, the GPS fails, hotspot fails, Bluetooth Fails…
• But is there a chance to downgrade / Comeback to Android Marshmallow, Oreo, Nougat, Pie? I’d like to say. Yes.  Find a suitable Android version and flash it like the guide above

Download Country/Carrier Based Stock Rom 

You can see there are many versions on the same Samsung galaxy. Country / Carrier, PDA, CSC. This is because Samsung designs the operating system to targeting countries ( USA, US, Uk, Korea, India, Thailand, Philippine, Australia, Africa, France, Italy, Indonesia, Malaysia, China, Sri Lanka, German, Mexico, Brazil, Canada, Egypt, Bangladesh, Turkey, Poland, Netherland, Spain, Portugal, Czech Republic…) These Stock Roms are not different, but pre-installed applications and frequencies may be different. So, Select your country or the nearest country. (Nearest Country not recommend but you can try).