[Samsung Galaxy S9+ Questions & Answers] fish312:
I have never had such a frustrating experience trying to get my S9+ rooted.

1. I got the S9+ (SM-965F/DS) about 2 weeks ago. I decide I want to root it before setting it up.

2. After a day or two of research, I download Odin and TWRP, switch to download mode and try to flash it.

3. Doesn't work, because OEM unlock is disabled and RMM is prenormal.

4. I enable Developer options, but the OEM Unlock button is not there.

5. Read up online, apparently it only appears 7 days after.

6. I try to do the date/time adjusting trick. It fails.

7. Okay, whatever, I decide to wait it out. Phone is left powered on the charger for 7 days.

8. 8 Days later and the OEM unlock is still missing. I guess I messed up. Post on reddit, nobody seems to know or care.

9. I don't know what to do, decide to do a full factory reset, then pop in a sim card and login to Samsung and Google accounts just to be safe.

10. Left the phone on for ANOTHER 7 days. OEM unlock appears and for a moment I'm elated.

11. I read up on a guide so I don't screw up. Seems like it's really important to boot straight into recovery after flashing.

12. I open Odin and disable auto restart. Flashed twrp-3.2.1-1-star2lte as AP and it succeeded.

13. Inserted an SD card containing the RMM bypass zip.

14. Very carefully, I reboot straight into recovery. The TWRP logo shows and I thought I was good.

15. DISASTER. I see some error messages about how something could not be mounted or wiped. Not too sure.

16. The phone reboots on its own! I panic and immediately hold down the key combination for recovery again (bixby+power+volup)

17. It doesn't work. Samsung logo shows for a dreaded few seconds and then I get a verification failed screen.

18. I restart and boot into recovery again. TWRIP IS GONE. Stock recovery is there again.

19. Boot into download mode confirms the worst... RMM Prenormal is back.

20. I don't know what to do. I decide to try flashing Pie to see if anything changes.

21. Download the latest official firmware for Pie and flashed it with Odin. It worked but RMM(Rlc) was still Prenormal. And the Pie experiences just feels bad.

22. OEM Unlock remains unlocked, but impossible to flash TWRP when RMM is prenormal.

23. Since SamFirm only provides the latest firmware, I waited half a day to download an older firmware from sammobile to try to revert.

24. Back to download mode. But, the phone refuses to downgrade bootloader from v2 to v1.

25. So here is where I am now, two weeks later and with an unrooted S9+ that's knox tripped and bootloader efused to v2. I've read through dozens of XDA threads to no avail, just so much contradictory info and S9 support is so sparse.

I regret getting this phone. Should have just bought an S7 refurb.

I'm so frustrated. I don't know what to do. I don't expect anyone to read through this mess of text. I understand that many of you will consider root unnecessary, and for most uses you're probably right, I'm just too used to having full control of my phone to ever give it up (firewall, adblock, app data backup and restore, these are just some of the things you need root for).

I guess this post is just more of a rant than anything. I'm going to wait in this 7 day jail again, and god knows how many more times I will have to keep trying. If you have better luck, let me know