If you only want the firmware and know what you're doing, then links will be at bottom.
If possible, Use the original charging cable that came with your phone, as sometimes there can be errors if you use an aftermarket cable.
If you don't know how to flash or convert from U to U1, read on.
As a precaution, I recommend removing your SIM card and SD card before flashing!
THIS WILL RESET YOUR PHONE!
Firstly, Download the modified Odin below as well as the firmware of your choice, there's 2, The latest version of Pie, and the highest version of Oreo that you can get without going to Pie.
All downloads will be labeled.
Step 1. Ensure that you have the Samsung drivers for mobile devices installed (which will also be linked below.)
Step 2.Extract the Firmware Zip that you downloaded, Open the modified Odin and click on the BL box, Then select the corresponding BL file.
Click the AP box and select the AP file, Do the same with the CP and CSC files by putting the matching file name into the corresponding boxes.
Step 3.Ensure USB Debugging is enabled and then shut down the phone. Then hold (In this order) Volume Down, Bixby, and Power button until you get to the Download mode warning screen.
Press the Volume Up button.
Step 4. Plug in the phone, and check Odin to ensure you see a blue box that says COM (also has a number at the end)
Step 5.Press Start in Odin and wait till you see pass, if it says PASS, The flash was successful and within about 10 minutes your phone will boot into the welcome screen.
If you are converting from the U firmware to the U1 firmware then you will have no carrier bloatware should have better performance and possibly better battery life as well.
If you have any issues, Don't hesitate to ask me!
If you have requests for any other firmware for the note 9, just leave a reply and ill see if i can download it and upload it.
Pie (N960U1UES1CSD1) https://www.androidfilehost.com/?fid...89523397959500
Oreo (N960U1UEU1ARL1) https://www.androidfilehost.com/?fid...89523397959514
Patched Odin https://www.androidfilehost.com/?fid...89523397959512
Samsung driver for mobile phones https://developer.samsung.com/galaxy...er-for-windows