[Samsung Galaxy Note 9 Guides, News, & Discussion] Rwhyayn:
Let me start off by stating that this is by no means my tutorial, all information was gathered from this community and organized into, hopefully, a helpful tut. Thank you to Max Weinbach, who originally posted this tutorial - due to issues with the file hosting server, that page hasn't been updated in a bit. Hopefully this will help in the meantime... And a big thank you to Venom0642 for hosting these files!

NO ROOT!!!

MUST BE SNAPDRAGON VARIANT (SM-N960, SM-N960U1, SM-N960W)

Optional: This will wipe the data on your phone. Use SmartSwitch to backup your phones data to your computer

Step 1: Download the 3 Items listed below (AT&T N960USQS1ARJA, Odin3, N960USQS1ARJA-U1CSA7)

Step 2: Copy or Move the "N960USQS1ARJA-U1CSA7.zip" file to your SD card and insert SD card into your Note 9 - If you do not have an SD card you can use ADB sideload to flash this .zip later in the process but I will not be going into much detail on this option. Skip this step if this is you and I will let you know when to use adb later on

Step 3: Unzip the "AT&T_N960USQS1ARJA" folder - Notice that you will have 5 files within this folder, we will only be using the 4 that begin with BL, AP, CP, and CSC

Step 4: Unzip the "Odin3_v3.13.1_3B_PatcheD" folder and launch the Odin3 executable

Step 5: Within Odin, click on the "BL" box and navigate to your "AT&T_N960USQS1ARJA" folder and select the corresponding file that beings with "BL". Do the same thing for the AP, CP and CSC fields within Odin, you can leave USERDATA empty - The BL, AP, CP, and CSC fields within Odin should now be populated with the "AT&T_N960USQS1ARJA" files

Step 6: Power down your phone. Once it is off, enter Odin mode by: holding Power button + Volume Down + Bixby button - Your phone may prompt you asking if you want to download a custom OS, press the Volume Up button to continue.

Step 7: Plug your Note 9 into your computer - If Odin is communicating with your phone, on the left hand side of the screen (odin on your computer), under "Log", you should see something like "Added!!"

Step 8: Hit "Start" within Odin - Your phone will now flash to N960USQS1ARJA and will automatically reboot into recovery mode when it is done. This will take a few minutes!

Step 9: You should now be in recovery mode. If you are not, power down your phone and boot into recovery by holding Power button + Volume Up + Bixby button. Use the volume keys to highlight "Wipe data/factory reset" , use the Power button to select it and select "Yes" to continue. - After the wipe completes, you will be brought back to the main menu of Recovery Mode

Step 10: Use the volume keys to highlight “apply update from SD card” and select it with the power key - If you do not have an SD card, this is where you would select "apply update from adb", open a command prompt/terminal on your computer and type:

adb sideload <file location of N960USQS1ARJA-U1CSA7.zip>

Step 11: Now find the N960USQS1ARJA-U1CSA7.zip file that you put onto your SD card earlier by using the volume buttons to navigate and power button to select it - Your phone will now flash to N960USQU1CSA7 (Pie/OneUI) and will boot up normally when it is finished. This will take a few minutes!

Step 12: You are now on Android Pie. Walk through the normal startup menus and then use SmartSwitch to restore your data. Done!

Hope this helps a few people! I will try to keep this thread up to date with current builds as Venom0642 makes them available :D