How to get an S9 G960U1 rooted? - Samsung Galaxy S9 Questions & Answers

I tried today to root this phone in all sorts of ways, but mainly I got stuck at the first step of getting a custom recovery, I found the twrp files for my phone, but when I tried to flash the file in Odin I got an error of "secure check fail : recovery"
I tried different versions of Odin.
I also tried t use fastboot, but it couldn't recognize my device, (adb devices shows my device, while fastboot doesn't [and of course I'm in download mode])
I've tried all sorts of drivers, from universal drivers to the specific one for my device from the Samsung website, fastboot still didn't see me device...
I have no idea what to do now...
I managed to get an official stock firmware update, that's all I was able to do...
Current device info:
One UI version: 1.0
Android version: 9
Baseband version: G960USQU3CSAB
Kernel version: 4.9.112-15119402
Build number: PPR1.180610.011.G960USQU3CSAB
SE for Android status: Enforcing, SEPF_SM-G960U_9_0001
Knox version: Knox 3.2.1 , Knox API level 27 TIMA 4.0.0
Security provider SW ver. : SAOMC_SM-G960U_OYN_XAA_PP_003, 4c51483458303498, XAA/XAA/XAA
previous device info (before the update):
Android Version: 8.0.0
Baseband version: G960U1UEU3ARK5
Kernel version: 4.9.65-14745140
Build number: R16NW.G960U1UEU3ARK5
Modem board: SDM845
If I think of anything else to add I'll edit and add it here...
If anyone wants more info, I'll try my best to provide it

Light_Wing said:
I tried today to root this phone in all sorts of ways, but mainly I got stuck at the first step of getting a custom recovery, I found the twrp files for my phone, but when I tried to flash the file in Odin I got an error of "secure check fail : recovery"
I tried different versions of Odin.
I also tried t use fastboot, but it couldn't recognize my device, (adb devices shows my device, while fastboot doesn't [and of course I'm in download mode])
I've tried all sorts of drivers, from universal drivers to the specific one for my device from the Samsung website, fastboot still didn't see me device...
I have no idea what to do now...
I managed to get an official stock firmware update, that's all I was able to do...
Current device info:
One UI version: 1.0
Android version: 9
Baseband version: G960USQU3CSAB
Kernel version: 4.9.112-15119402
Build number: PPR1.180610.011.G960USQU3CSAB
SE for Android status: Enforcing, SEPF_SM-G960U_9_0001
Knox version: Knox 3.2.1 , Knox API level 27 TIMA 4.0.0
Security provider SW ver. : SAOMC_SM-G960U_OYN_XAA_PP_003, 4c51483458303498, XAA/XAA/XAA
previous device info (before the update):
Android Version: 8.0.0
Baseband version: G960U1UEU3ARK5
Kernel version: 4.9.65-14745140
Build number: R16NW.G960U1UEU3ARK5
Modem board: SDM845
If I think of anything else to add I'll edit and add it here...
If anyone wants more info, I'll try my best to provide it
Click to expand...
Click to collapse
AFAIK, root isnt possible for the 960U's, only the 960F's

I think I saw someone write they were able to root it.. though I couldn't find it again for some reason...
Also, it's supposed to be an UNLOCKED phone with the U1 software... I don't understand how or why it cannot be rooted (or change to a custom ROM)...
Hope someone know how to get it done

Light_Wing said:
I think I saw someone write they were able to root it.. though I couldn't find it again for some reason...
Also, it's supposed to be an UNLOCKED phone with the U1 software... I don't understand how or why it cannot be rooted (or change to a custom ROM)...
Hope someone know how to get it done
Click to expand...
Click to collapse
"Unlocked" means carrier SIM unlocked. Different thing.
All Qualcomm Snapdragon variants have locked bootloaders that prevent rooting. Except the Chinese variant - the lone exception.
There was an exploit found last year that allowed rooting for one of the Qualcomm variants but can't remember which, and newer firmware may have since blocked the exploit.

Is it worth trying to install firmware (official) for the g9600 phone (China Snapdragon)? And from there if that was successful, would I be able to use CROM to OEM unlock?

Light_Wing said:
Is it worth trying to install firmware (official) for the g9600 phone (China Snapdragon)? And from there if that was successful, would I be able to use CROM to OEM unlock?
Click to expand...
Click to collapse
nope. it will very likely fail at the Odin flash process. you can if you want to, but im betting it will fail. Hell, i even had to use a modded Odsin just to flash another carriers firmware on mine, but it worked like a charm. That being said, it was all within the same basic model info, what youre proposing isnt

I'll try the modded Odin, if its a fail, I'll probably give up

Light_Wing said:
I'll try the modded Odin, if its a fail, I'll probably give up
Click to expand...
Click to collapse
careful not to permabrick your phone man

Light_Wing said:
I'll try the modded Odin, if its a fail, I'll probably give up
Click to expand...
Click to collapse
So, What's the verdict?
I'm guessing it was a NO-GO.

baraban0 said:
So, What's the verdict?
I'm guessing it was a NO-GO.
Click to expand...
Click to collapse
Yeah, I have up and got an G9600/DS

Funcionó?
Light_Wing said:
Yeah, I have up and got an G9600/DS
Click to expand...
Click to collapse
Cambiaste la ROM de g960u1 a la de g9600 y pudiste rootearlo?

Josh730 said:
Cambiaste la ROM de g960u1 a la de g9600 y pudiste rootearlo?
Click to expand...
Click to collapse
english pls
as for your answer, no, i got an g9600, and rooted it

Wow u really rooted it

Related

S9 still stuck in Apr 2018 security patch, no updates whatsoever...

Hi, my Samsung S9 (SM-G960F, dual SIM) was purchased in May 2018 from Dubai (fully unlocked) and is being used in India. There were no carrier restrictions at the time of purchase, it was purchased fully unlocked.
Even today, it still shows Android Security Patch Level at 1/April/2018. I have enrolled into Samsung Pie beta, and I try everyday to download software manually, but no update has come, either in security patch or in software version. The details are given below:
When I try to update software manually by going to software update - download updates manually, it says 'The latest updates have already been installed. Current version : G960FXXU1ARD4/G960FOXM1ARCA/G960FXXU1ARD6'
When I go to settings - software information, the android version is 8.0.0, samsung experience version is 9.0, baseband version is G960FXXU1ARD6, build number : R16NW.G960FXXU1ARD4, kernel version : 4.9.59-13138374-QB17882910 [email protected] #1 Tue Apr 24 11:50:17 KST2018, android security patch level : 1 April 2018
I have even downloaded Samsung Smart Switch and tried downloading latest software but no use. The message I get there is 'Your software is up to date : RD4(INS)'
Please help. At this rate, I am not sure if I will receive any updates at all, even security patches. I dont know what is the problem.
Thanks in advance.
Flash it manually with ODIN, loads of guides all over XDA if you look
Thanks a a lot.
*Detection* said:
Flash it manually with ODIN, loads of guides all over XDA if you look
Click to expand...
Click to collapse
Thanks.
I have downloaded Odin v 3.13.1. I have downloaded the Android Pie firmware available in Sammobile applicable in UAE and the firmware is G960FXXU2CRLI/G960FOXM2CRLI.
Can I directly update my firmware from G960FXXU1ARD4/G960FOXM1ARCA using Odin 3.13.1 to G960FXXU2CRLI/G960FOXM2CRLI. Please advise.
Thanks.
Kssomu said:
Thanks.
I have downloaded Odin v 3.13.1. I have downloaded the Android Pie firmware available in Sammobile applicable in UAE and the firmware is G960FXXU2CRLI/G960FOXM2CRLI.
Can I directly update my firmware from G960FXXU1ARD4/G960FOXM1ARCA using Odin 3.13.1 to G960FXXU2CRLI/G960FOXM2CRLI. Please advise.
Thanks.
Click to expand...
Click to collapse
Yea, just flash as normal, your bootloader will change to version 2 so you will not be able to downgrade back to that current firmware you are running as it is version 1
*Detection* said:
Yea, just flash as normal, your bootloader will change to version 2 so you will not be able to downgrade back to that current firmware you are running as it is version 1
Click to expand...
Click to collapse
Thanks a lot for the prompt response. I would attempt to directly flash to this version in one step tonight.
Thanks once again.
This is happening to me too...
I have an s9 plus bought from Dubai full unlocked...bt still stuck on December 2018 patch where as other s9 plus recieving April 2019 patch..I'm worried about this..my build number is SM965FXXU2CRLI

TA-1054 - Update from 7.1.1 to xxx ?

hi ppl...
i am on stock 7.1.1 with unlocked bootloader.
can i update straight to custom pie, if so how ?
thanks in advance.
ps: i tried flashing a pie vendor image, getting tons of errors.
need a little help here...
tried installing omni rom.
flashing in slot a works fine, when switching to slot b i get error:
failed to mount /bt_firmware
failed to mount /firmware
You need to update the device firmware if your bootloader Is unlocked
You can search for the firmware and the tool yo flash It
Send me a pm
where can i find this firmware?
weird thing is, i found a way to get omni to run, even with those error in twrp.
paparansen said:
where can i find this firmware?
weird thing is, i found a way to get omni to run, even with those error in twrp.
Click to expand...
Click to collapse
You can find the firmware AND the tool here, justo look for tour model and variant.
If you are stuck ok 7.1.1 you have the chinese variant (00CN) same as i do (i've tried the same)
https://fih-firmware.hikaricalyx.com/hmd_en.html
This page Is from a senior member here on xda, however search your model and variant firmware, if you flash a firmware for other variant YOU WILL KILL YOUR DEVICE
Good luck me if you need further help send me a PM
ah ok... by firmware you mean stock rom ^^
i allready tried to flash the android 8 & 9 from that page
for ta-1054 - ost get stuck at "checking device status".
i was only able to flash the android 7 from that page.
paparansen said:
ah ok... by firmware you mean stock rom ^^
i allready tried to flash the android 8 & 9 from that page
for ta-1054 - ost get stuck at "checking device status".
i was only able to flash the android 7 from that page.
Click to expand...
Click to collapse
Wich variant do you have?
And what firmware are you tring?
like i wrote above: ta-1054 & android 8 & 9
paparansen said:
like i wrote above: ta-1054 & android 8 & 9
Click to expand...
Click to collapse
But is Android one variant? Check on settings where Is device info
In hardware should say somenthing like 00CN or 00WW
there is no android one variant on that page.
i got the china version of ta-1054
paparansen said:
there is no android one variant on that page.
i got the china version of ta-1054
Click to expand...
Click to collapse
Then download the firmware marked as PL2-347C-0-00CN-B04
On the bottom of the page there Is a tool called Generic flashing script (or somenthing like that)
Once you have downloaded both files uncompress the firmware un any folder and copy the tool on the same folder
Click on the tool icon and follow the instructions
Nokia Online Service Tools (Insufficient_Permissions).
I cant do Firmware Upgrade with Nokia Online Service Tools ver. 6.2.8.
Its shows me this Error Message:
(Insufficient_Permissions).
What should i do?

Custom rom moto g7 play

Is there any custom rom for the moto g7 play that is stable?
Chapie1 said:
Is there any custom rom for the moto g7 play that is stable?
Click to expand...
Click to collapse
What is the most current firmware? I can try to build one as long as you have twrp and root
Sent from my moto g(6) play using Tapatalk
Sands207 said:
What is the most current firmware? I can try to build one as long as you have twrp and root
Sent from my moto g(6) play using Tapatalk
Click to expand...
Click to collapse
there they are I use the xt1952-2 version
https://mirrors.lolinet.com/firmware/moto/channel/official/
Chapie1 said:
there they are I use the xt1952-2 version
https://mirrors.lolinet.com/firmware/moto/channel/official/
Click to expand...
Click to collapse
Code:
GENERAL INFO
Manufacturer: motorola
Brand: motorola
Phone Model: moto g(7) play / moto g(7) play
Device Type: channel
Product Name: channel_reteu
Country of Origin:
Manufacturing Date:
Knox Warranty Void:
Colour:
Internal Storage:
CSC INFO
Product Code: pH
Original CSC Code:
Firmware's CSC Code:
Active CSC Code:
Available CSC Codes:
CSC Country:
CSC Country ISO:
Mobile Operator: Virgin / 23430 / 23438
FIRMWARE INFO
Bootloader Version: 0xC111
PDA Version:
CSC Version:
Baseband Version: M632_26.100.01.120.01R CHANNEL_SUPER_CUST
Latest Firmware: N/A
Firmware Status:
Kernel Version: 4.9.112-perf+ [email protected] #1 32-bit
Java Virtual Machine: ART 2.1.0
OS INFO
Root Existence: Yes
Android Version: 9
Build Number: PPYS29.105-134-9 (cd8e0)
Build Fingerprint: motorola/channel_reteu/channel:9/PPYS29.105-134-9/cd8e0:user/release-keys
Build Description: channel_reteu-user 9 PPYS29.105-134-9 cd8e0 release-keys
Build Date: Mon Feb 10 12:39:21 CST 2020
Changelist:
HARDWARE INFO
Hardware: qcom
Board: msm8953 [32-bit]
Platform: msm8953
Chip:
GPU: Qualcomm Adreno 506
Modem Board:
Hardware Revision:
Total RAM: 1.79 GB
Screen: 5.63 inches, 720 × 1512 pixels, 293 ppi, 240 dpi
Camera:
Rear: 13MP
Front: 8MP
Sound Card: msm8953_-tas2560
Loudspeaker:
WiFi Chip: Motorola Mobility LLC, a Lenovo Company
GPS Chip:
Battery: Li-ion 3000 mAh, Health: Good
USAGE HISTORY
Battery Health: 99.4 %
Last saved on: 08-Apr-2020 00:53:49
Thanks, I'll get to work on a rom today!
Sent from my moto g(6) play using Tapatalk
I used this one for my XT1952-4...
The build is for XT1952-2 (posted by αℓ૯×12345) but I went ahead and tried it. So far (couple days now) it is working pretty well. I've connected it to my WiFi and I've been surfing the internet. Also, Google Play Store works.
Hope this is helpful:
https://forum.xda-developers.com/g7-play/development/gsi-lineageos-17-1-modified-t4075035
I followed the directions in that thread; I already had the bootloader unlocked (obviously, right?) I also had TWRP installed using the method in this thread:
https://forum.xda-developers.com/g7-play/how-to/how-to-successfully-install-twrp-g7-play-t3979701
Read down the thread a little bit. In the directions, Linuxassassin leaves out what turned out to be an important step for me, which is after I fastbooted the TWRP image linked to in that thread, I needed to select Wipe from the TWRP menu and then Format Data. I needed to do that to remove the encryption from the file system so that it was usable for the rest of the steps for installing TWRP. As already stated, it is working pretty well at the moment.
Edit...
FortunateFennec said:
The build is for XT1952-2 (posted by αℓ૯×12345) but I went ahead and tried it. So far (couple days now) it is working pretty well. I've connected it to my WiFi and I've been surfing the internet. Also, Google Play Store works.
Hope this is helpful:
https://forum.xda-developers.com/g7-play/development/gsi-lineageos-17-1-modified-t4075035
I followed the directions in that thread; I already had the bootloader unlocked (obviously, right?) I also had TWRP installed using the method in this thread:
https://forum.xda-developers.com/g7-play/how-to/how-to-successfully-install-twrp-g7-play-t3979701
Read down the thread a little bit. In the directions, Linuxassassin leaves out what turned out to be an important step for me, which is after I fastbooted the TWRP image linked to in that thread, I needed to select Wipe from the TWRP menu and then Format Data. I needed to do that to remove the encryption from the file system so that it was usable for the rest of the steps for installing TWRP. As already stated, it is working pretty well at the moment.
Click to expand...
Click to collapse
Sorry folks. New here; don't know how to edit my posts ...Edit: Now there's an edit button... huh. OK.
Ran into a little problem if you are rebooting from TWRP when the above stuff has been done.
When rebooting from TWRP using the TWRP image in the above thread, and it gives you the options to "Prompt to install TWRP app if not installed" and "Install as system app" be sure NOT to install them. Press the button that says "Do Not Install." If you do install them, it causes the boot to hang up on the "android" screen. I fixed the problem by going back into TWRP, wiping the system partition, and reinstalling the custom ROM image.
Anyway, hope this helps someone.
CFKod said:
Code:
GENERAL INFO
Manufacturer: motorola
Brand: motorola
Phone Model: moto g(7) play / moto g(7) play
Device Type: channel
Product Name: channel_reteu
Country of Origin:
Manufacturing Date:
Knox Warranty Void:
Colour:
Internal Storage:
CSC INFO
Product Code: pH
Original CSC Code:
Firmware's CSC Code:
Active CSC Code:
Available CSC Codes:
CSC Country:
CSC Country ISO:
Mobile Operator: Virgin / 23430 / 23438
FIRMWARE INFO
Bootloader Version: 0xC111
PDA Version:
CSC Version:
Baseband Version: M632_26.100.01.120.01R CHANNEL_SUPER_CUST
Latest Firmware: N/A
Firmware Status:
Kernel Version: 4.9.112-perf+ [email protected] #1 32-bit
Java Virtual Machine: ART 2.1.0
OS INFO
Root Existence: Yes
Android Version: 9
Build Number: PPYS29.105-134-9 (cd8e0)
Build Fingerprint: motorola/channel_reteu/channel:9/PPYS29.105-134-9/cd8e0:user/release-keys
Build Description: channel_reteu-user 9 PPYS29.105-134-9 cd8e0 release-keys
Build Date: Mon Feb 10 12:39:21 CST 2020
Changelist:
HARDWARE INFO
Hardware: qcom
Board: msm8953 [32-bit]
Platform: msm8953
Chip:
GPU: Qualcomm Adreno 506
Modem Board:
Hardware Revision:
Total RAM: 1.79 GB
Screen: 5.63 inches, 720 × 1512 pixels, 293 ppi, 240 dpi
Camera:
Rear: 13MP
Front: 8MP
Sound Card: msm8953_-tas2560
Loudspeaker:
WiFi Chip: Motorola Mobility LLC, a Lenovo Company
GPS Chip:
Battery: Li-ion 3000 mAh, Health: Good
USAGE HISTORY
Battery Health: 99.4 %
Last saved on: 08-Apr-2020 00:53:49
Click to expand...
Click to collapse
I downloaded your firmware as well as the sprint and the retus variants. It will take me a day or two to complete. are you willing to test?
Sent from my moto g(6) play using Tapatalk
Sands207 said:
I downloaded your firmware as well as the sprint and the retus variants. It will take me a day or two to complete. are you willing to test?
Sent from my moto g(6) play using Tapatalk
Click to expand...
Click to collapse
What ROM are you porting? Id be willing to test on my RETGB (XT1952-1 iirc) as the firmware is quite similar between devices.
00p513 said:
What ROM are you porting? Id be willing to test on my RETGB (XT1952-1 iirc) as the firmware is quite similar between devices.
Click to expand...
Click to collapse
It will be custom stock. I will grab your firmware as well. my upload is slow but it's now Wednesday, tonight I'll finish them and upload them. Are you able to flash zips with your recovery as of now? Any requests or suggestions on root?
Sent from my moto g(6) play using Tapatalk
Sands207 said:
It will be custom stock. I will grab your firmware as well. my upload is slow but it's now Wednesday, tonight I'll finish them and upload them. Are you able to flash zips with your recovery as of now? Any requests or suggestions on root?
Sent from my moto g(6) play using Tapatalk
Click to expand...
Click to collapse
we are currently having issues with magisk, but phh's su works on gsis. and yes i can flash zips in twrp
Sands207 said:
It will be custom stock. I will grab your firmware as well. my upload is slow but it's now Wednesday, tonight I'll finish them and upload them. Are you able to flash zips with your recovery as of now? Any requests or suggestions on root?
Click to expand...
Click to collapse
Ill test
I've been sick so I'm a little behind. I'll include the phh su for testing purposes until we can get magisk working. Expect an update on the ROM's soon. I'm building for 4 different models so it's taking me longer than i anticipated.
Sands207 said:
I've been sick so I'm a little behind. I'll include the phh su for testing purposes until we can get magisk working. Expect an update on the ROM's soon. I'm building for 4 different models so it's taking me longer than i anticipated.
Click to expand...
Click to collapse
Thank you.
Moto G7 PLAY with MicroG?
Any progress with this project?
I have the Moto G7 Play..
I would like to install TWRP, flash custom ROMs.. is this available yet?
In particular i would like a ROM that supports MicroG /signature spoofing..
https://www.youtube.com/watch?v=UXLo15l2i4c
I have seen this is possible, but i do not know how to achieve it.. any help?
i have the sprint/boost version. i have got twrp to work but ran into a problem with magisk. treble versus non treble. would be willing to pull anything that would help or try anything, this is an extra phone for me so would love to help someone.
bigsteve62275 said:
i have the sprint/boost version. i have got twrp to work but ran into a problem with magisk. treble versus non treble. would be willing to pull anything that would help or try anything, this is an extra phone for me so would love to help someone.
Click to expand...
Click to collapse
What twrp u use and is it decrypting phone properly
i used the twrp that spaceminer provided, followed that tutorial, can possible attach a copy and refer you to the tutorial. also used the dtbo that was provided also.
it wont let me attatch the twrp, sorry
if needs be i will write out exatcly what i have done and send you screen shots of everything. i will help however i can, you guys have been great. keeps me in paperweights lol

Help root for Samung galaxy s7 Active Android 8 OREO. G891AUCU6CTB1

I need some help to root this device. I can't find TWRP files for it. And the ones that "work" dont. No matter what i flash with Odin I always get a "failed" message. Here is the phone info to help you all out. THANKS!
Samsung Experience version: 9.0
Baseband version: G891AUCU6CTB1
Kernal version: 3.18.71-15820403////// [email protected]////WED Feb 5 15:29:57 KST 2020
Build Number: R16NW.G891AUCU6CTB1
SE for Android Status: ENFORCING///////SEPF_SAMSUNG-SM-G891A_8.0.0_0018
Knox Version: Knox 3.1//// Knox API Level 25////Tima 3.3.0
Security software version: MDF v3.1 release 2////WLAN v1.0////VPN PP-MOD v2.1 release 1.1////ASKS v2.0.0 release 180123////FIPS BoringSSL v1.2/////FIPS SKC v1.7////FIPS SCrypto v1.0/////SMR Dec-2019 release 1
Android security patch level: December 1, 2019
Thanks for you help!
that's the very last firmware is it not.... how is the battery life for it?
sadly there is no root for android 8.0 on this phone
supertac said:
that's the very last firmware is it not.... how is the battery life for it?
sadly there is no root for android 8.0 on this phone
Click to expand...
Click to collapse
Can it be downgraded I just got one and it's super slow practically useless....
fockewulf190a10 said:
Can it be downgraded I just got one and it's super slow practically useless....
Click to expand...
Click to collapse
just replied to your similar complain elsewhere... Am on android 8 unrooted and 300+ apps and hell of a lot of other stuff and no such issues... so may be there is more wrong with the phone than you realise....
fockewulf190a10 said:
Can it be downgraded I just got one and it's super slow practically useless....
Click to expand...
Click to collapse
back to 7.0? how do you do that?
落后念书 said:
back to 7.0? how do you do that?
Click to expand...
Click to collapse
No se puede
I'd really like to be able to get this phone onto the Verizon network. I have the exact same software numbers as the OP and am trying to open my phone up to work on Verizon. I've seen bits and pieces that others have done it but never have found the complete successful procedure.
Anyone??

How to install Q roms on a device with P fw and TWRP installed? (SM-G960F)

Hello friends
I'm trying to flash custom Q roms in TWRP on my S9 (SM-G960F), but have received the same error message for any Q rom:
ERROR:
Vendor image on the device
is NOT compatible
Expected Android 10 vendor
Click to expand...
Click to collapse
I've only been able to successfully flash P roms, namely the Pie-based LightRom.
Based on the error message, it seems I need to update the firmware to Q before installing custom Q roms?
I've also seen some roms note installation requirements like "ROM Firmware Required: OneUI 2.x", which is new to me (have not seen a TW/OneUI ver requirement for roms I've used on S4, S7, N8).
May I ask someone to explain the steps required to install Q roms (eg, Havoc-OS) coming from P firmware? There seems to be some assumptions in most install instructions I'm not aware of, maybe since I am on older FW. (I am asking here, since I did not find instructions in any of the Q roms I tried)
So far, all I have done to the phone since unboxing it was to install TWRP 3.4.0, following the official guide for Exynos S9.
I am guessing I need to download latest official firmware image from sammobile or something for my device, and flash it in Odin. Is this correct?
If so, can someone explain the steps so that I can have latest FW for my device while maintaining TWRP and not bricking the device?
Thank you for your help
Extra info
(Snapshot from LightRom rom)
One UI version: 1.0
Android version: 9
Baseband version: G960FXXU6CSG4
Kernel version: 4.9.59
Android security patch level: 1 October 2019
Click to expand...
Click to collapse
UPDATE:
I installed latest firmware from Sammobile, flashed it through Odin following their instructions, reinstalled TWRP, and am now able to flash Q roms.
For those who have stock rom < Q, I would suggest updating firmware through OTA before flashing TWRP. If you cannot OTA, download the latest firmware from Sammobile and flash it through Odin following their instructions, then flash TWRP, then you can flash Q roms.
So:
Update firmware through OTA or via Odin with latest firmware from Sammobile.
Flash TWRP
Flash whatever rom you want.

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