yashsingh1/xdaforums huggingface dataset:
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Thomas Cardif:
Same here all Gapps "Nano ,Pico,Stock "
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] andrewbaker1:
I had the same issue, I got around it by deleting the apk for setupwizard under priv-app.

Flashed back to OOS as found some issues with the current nightly. Will switch back when LOS15.1 is promoted to stable
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Thomas Cardif:
Works for me gapps

Okay that works for me .:)

https://xdaforums.com/android/apps-games/arm-unofficial-opengapps-builds-android-t3743495
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] cristianvaz81993:
Cant we flash anything on twrp? It cant read internal storage
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Kookitza:
I keep getting "Google services framework has stopped" FC, No matter what gapps i flash.

plz help :crying:
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] DanielBerlin:
The same problem to me.

Delete all network settings and connect new with your networks.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Galaxysm:
Hi guys just got my phone today and I want to flash this rom. I have bootloader unlocked I’m on latest OOS I’m guessing it’s 8.0 and version 5.0.3. Also phone is encrypted and using blu recovery. Is there anything I need to know before flashing this rom?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] preference:
Use codeworx recovery not blu
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Galaxysm:
Which one universal or 8.1?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] preference:
Universal. Remember to remove your pin/password and fingerprint authentication stuff before using twrp for backups or modifications. If you're doing this for the first time, back up your phone's files, you'll have to wipe your device before installing any custom roms or kernels.

There's a thread somewhere in the 5t forums that explains everything. There's also a thread with a tool that makes it easy to unlock the bootloader and install recoveries, but I personally find it simple enough to do with text commands. I don't know how comfortable you are with this stuff, so if you haven't done it before make sure to read read read.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Galaxysm:
I’m okay with also just using the text commands that’s how I did it.

And thanks. Didn’t know about removing the pin and password thingy.

Can I flash that recovery from blu or it would be better to just flash it from adb?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] timbit123:
So cool, congrats for hitting nightly builds!

Quick question, I returned stock because Google Pay wasn't working because bootloader verification on build feb 23. Did someone get it working? Thanks!
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Sygmasf:
thanks for explaining you effort on the kernel, for the first time it feels good to have a stock one!

ps: regarding the feature requests, any chance to get the ability to activate the fastlane?

anyway thank you for the beautiful rom and have a good time!
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] preference:
You should be able to flash the recovery from another custom recovery. Go into the flashing menu, change file type to image (img), click on the codeworx universal recovery file, choose recovery in the next menu, then flash. On your next reboot you should have codeworx recovery instead of blu. You can still flash blu's kernels with codeworx even though he sometimes says there might be bugs - I use elementalx but have flashed blu before with codeworx.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Galaxysm:
Ended up doing that, I used to have a 6P and 1+5 but it was some time back. So I haven't really been up to date on what has changed. All this encrypted and multiple recovery is having me confused.

I'm guessing you are running this rom. Is everything going good if I flash the latest build?

I'm not a big fan of flashing different kernels, I usually just stay with what comes with the ROM.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] OhioYJ:
Latest official TWRP? Don't do that, use Codeworkx, universal TWRP. If it still reboots into TWRP after telling it to boot to system a factory reset will usually fix it. However right now it sounds like you are using the wrong TWRP.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] OhioYJ:
I doubt it, a couple pages back this is explained. The device will even show up as uncertified in the play store unrooted. To even get Netflix to show up you need to be rooted (install Magisk). I don't care, I use Magisk anyways, as I need it for various other things. However once using it my device passes safety net and shows up as certified so I would assume Android pay would work? (I don't use it, so I don't know).
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] timbit123:
I'll try, thx
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] OhioYJ:
You are using the exact Gapp package I am using. That is the only one I could find with a working setup wizard. I found everything is very picky. For me I had no luck installing anything like kernels or Magisk for the first boot if I did it would just take me back to TWRP, and the only way out was a factory reset, then it would boot generally. Some mods would require a complete wipe of /system and a reinstall.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] OhioYJ:
I was able to add Gapps, just nothing else.

To be fair this is the first official release. So we may have some minor bumps in the road.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] timbit123:
Android Pay is working with Magisk 16.0, lineage-15.1-20180226 and MindTheGapps!
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] the Doctor:
I was able to flash the ROM and MindTheGapps before the first boot, no problem. However, Magisk should be flashed after the first boot.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] timbit123:
Waking up the phone with fingerprint or power button can be slow like... 5sec to not working at all. Im using nightly build 26Feb. I dont know if others have the same issue
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] rjrjzozo:
saturating earphone speaker during phone calls

Anybody else having the saturating earphone speaker during phone calls? Since 20 Feb build and also on latest nightly. Have to copy audio_platform_info.xml from 18 Feb build to fix it.

I want to know if it's only on my device.

Clean flashed nightly with mindgapps then boot, setup and then flashed magisk. No issue so far, aside the one mentioned above.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Subir Deb:
OTG not working.

How do I get the OTG to function.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] alexiuss:
There's a nasty bug when using two SIM cards and deactivating the second one, android.phone keeps crashing, both SIM card icons come and go and phone shuts down into recovery after a few seconds.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Thomas Cardif:
https://xdaforums.com/android/apps-games/arm-unofficial-opengapps-builds-android-t3743495

Works for me.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Kookitza:
Im using this gapps and still get this FC
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] the Doctor:
That's not the right gapps.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Kookitza:
So what is the right gapps?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Skinpipe:
https://androidfilehost.com/?fid=745849072291693774

In the OP

Open Gapps doesn't have 8.1 gapps yet
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Thomas Cardif:
https://builds.nezorfla.me/?dir=arm64/test

The direct link to the version I use. And then nano

You also deleted everything in TWRP? Under extended and then system? And then reinstall everything again.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Kookitza:
Thanks for helping me.

But i still get this FC with the above packeges.

What do you mean by "Under extended and then system"? :confused:
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] marko94:
Use this gapps recommended by Lienageos https://androidfilehost.com/?w=files&flid=170282 and no problems
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] MarcoReckless:
I'm currently running OOS.

Can I flash with ROM without problems if I do a full wipe (but WITHOUT internal storage)?

(I have like 70gbs of music in my internal memory, so I would like to avoid copying everything everytime I have to try a ROM).

Also, how's the battery? Any kernel recommended?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Thomas Cardif:
TWRP, Wipe, Advanced Wipe than delete System and data and Install All New.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] choukajohn:
Hi everyone.

Is there any way to completely disable the navigation bar?

I mean not just hiding it with expended desktop but really disable it?

Thank you!

Edit : just add qemu.hw.mainkeys=1 to build.prop
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] mandarthedon19@gmail.com:
Loved this ROM so much. Since yesterday working nicely. No FCs so far. Magisk 16 and viper4android FX (magisk module) also working fine.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] the Doctor:
MODERATOR NOTICE

This thread is getting filled with people reporting FCs on the setup wizard. The problem is usually a failure to read and following the directions found in the OP and by the developers in the thread.

A couple pages back the correct gapps package was posted more than once, and immediately after that people were asking why they are getting FCs and what the right gapps package is.

Per the forum rules:

No question is a stupid question and we're all here to learn and help each other. You can help keep the thread clean and on track by doing a little reading before posting.

Cheers, all.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] lexi1986:
Great rom flashed this one yesterday no problems at all. Had the fc problem but after the right gapps package this was solved :victory:
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] the Doctor:
There is no need to format /data in TWRP and lose /sdcard. Just do the normal wipes (art/dalvik, cache, data, system). I can't help with battery, but it seems fine to me. As for kernel, there really is no need to flash a custom kernel with LineageOS. They do a great job keeping it updated and optimized.

After flashing LOS, make sure to remove your PIN/password before entering TWRP.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Seferi:
I looked everyhwhere and couldn't find the setupwizard app. Under /data/data there is a com.android.setupwizard folder. Removing that didn't help...
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] MarcoReckless:
Alright.

Yeah, I had the PIN problem a few weeks ago, didn't know anything about the whole encryption thing.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] rijads:
People posted 3 different versions of gapps, so for those keeping up with the thread it really isn't clear which one to flash, especially after someone saying that magisk should be installed after first boot, even though OP says all zips should be flashed before first boot.

How's the camera btw, is it fully supported. does 4k recording work ?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] the Doctor:
Which is why I suggested that people read the instructions in the OP and by the developers in the thread. Out of all the voices out there, they are the most important.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] la2o:
Just wanted to talk about my experience.

When I installed the rom with the recommended gapps found in OP. It gave me issues with Setup Wizard.

So..

I actually went to LineageOS Wiki, and they recommend MindTheGapps.

Also, the Moderator is using it too!

https://wiki.lineageos.org/gapps.html

I installed it without any issues.

All in all, excellent ROM and I'm glad it finally became official.

Thank you!

*Edit: forgot to ask. Is LineageOS 14.1 root compatible with 15.1? Because that was the only thing available on the site.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] mandarthedon19@gmail.com:
How to use weather service ?? I downloaded openweather app from LOS extras but don't see anything in widget.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Delpo_96:
today's nightly is going to be up?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] OhioYJ:
I would assume we are now going back to a once a week "nightly" now.

---------- Post added at 09:04 AM ---------- Previous post was at 08:57 AM ----------

It's not under /data/data, that's not where apps are installed, that's where data for apps you install are placed.

Read this post if you really want to go that route:

https://xdaforums.com/showpost.php?p=75695587&postcount=438
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] senpoos:
Is it a Treble based ROM now ?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] persieghini:
Flashed this rom and used it for a full day

Was coming from OB3

1)Remove pin/security password anything of that sort

2)wipe dalvik,cache,system and data(advanced wipe)

3)flash ROM zip + mindthegapps 8.1.0(opengapps crashing for some people)

4)reboot into system and setup initial steps(do not setup password)

5)go into recovery and flash Magisk/SuperSU

6)restore data (apps) with titanium backup

NOTE:

1)mindthegapps DID NOT have faceunlock(smart lock didn't have any options-no idea why)

2)I flashed nano opengapps unofficial AFTER booting into system and setting up and all the steps mentioned earlier.

3)faceunlock worked perfectly no issues all good

I returned to OB3 now after a day's use because of battery life......

Compared to stock (ofc stock is better) I didn't get comparable results also...

Getting 3 hours of SOT and barely making it through the day changed my mind...gonna stick with stock for a while

Standby was around 11hours(which is actually decent...)

But for the amount of usage(no games just browsing and downloading 2 apps LITERALLY) 3hours SOT was bad for me...

Sorry I forgot to get screenshots of battery usage...will do to support my post from next ....all that I've written is true and is my experience...might vary for others...
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Evisceration:
just out of curiousity.

why does it matter?

what do you expect from it being Treble'ized?

it itself does not bring any benefits to the users, so i wonder why everyone is jumping onto the Treble hype train :)

to your question: yes but no.

we symlink /system/vendor to /vendor, but it lies on the system partition.

OnePlus does not have a dedicated vendor partition, but a unused partition, that could be used as vendor partition BUT we decided against doing so, because:

No benefits

More work for us and increased complexity

Everyone would need to flash a zip file, which repartitions with a chance of bricking the device

Flashing above zip turns into a requirement, means everyone has to flash it in order to use the rom

TL;DR

No Treble unless OnePlus introduces it, because it has no benefits to anyone
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Kookitza:
[MENTION=4833385]Evisceration[/MENTION] When the next nightly should release?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] mi3x:
I see there are some issues with different versions of gapps, still is there any chance it can be used with microG? I'm on unofficial LOS 14.1 all is great, but I'd take the plunge only for the increased security oreo has, though.

Thanks for your work!
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] MarcoReckless:
Which V4a module did you use?

The completely standalone one or the one that installs the APK for you?

Because I'm getting I/O error with both..
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] keitaro__:
Hello,

Is the NFC working? I'M unable to activate it.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Prevos:
Hi guys,

I flashed this tonight, all is working fine. But I didn't see anything about face unlock. Does it not available in custom rom ?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] OhioYJ:
Weird, I'm charging my phone now, and I had just shy of 5 hours SOT, but I didn't start at 100%, it was only at about 75% maybe? This is a decrease, but I was also setting everything up, so that's not a real indication of anything yet.

I have noticed it appears the big CPU is staying at 2457 MHz pretty much anytime the screen is on, even though the CPU load is basically 0. If I try and turn the big CPU off, the little CPU pretty much stays at 1900 MHz all the time. It is going to sleep though, so I guess I'll wait and see what kind of battery life I get on a full charge.

I think I'll try and new kernel though and see if I get the same results. (Wifi is broken in ElementalX though, so I'll have to try something else)
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Thomas Cardif:
Bluetooth does not work for me, searching for devices crashes the phone.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] free-sidux:
I flashed the nightly coming from testing 0223 and ended up in a boot loop. Am I supposed to flash the experimental first?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] OhioYJ:
I don't have this problem. Bluetooth works for me, found my tablet right away.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Avuton Olrich:
I've been running the unofficial builds up until 20180220_170930, if I try to boot anything newer, including the official builds, everything locks up/crashes and nothing ends up working. I don't have gapps installed. I always end up reverting. Help please!

And I've been getting tons of lines like these:

02-27 14:29:09.242 2099 2633 W ActivityManager: Duplicate finish request for ActivityRecord{e821799 u0 org.lineageos.setupwizard/.WelcomeActivity t2257 f}
02-27 14:29:09.268 2099 2115 I WifiService: getWifiEnabledState uid=1000
02-27 14:29:09.270 2099 2115 I ActivityManager: START u0 {act=com.android.wizard.LOAD flg=0x10000001 cmp=org.lineageos.setupwizard/.wizardmanager.WizardManager (has extras)} from uid 1000
02-27 14:29:09.333 2099 2115 I ActivityManager: START u0 {act=org.lineageos.setupwizard.LINEAGE_WELCOME flg=0x4000000 cmp=org.lineageos.setupwizard/.WelcomeActivity (has extras)} from uid 1000
02-27 14:29:09.405 3590 3590 I BaseSetupWizardActivity: Starting activity with USER_SETUP_COMPLETE=true
02-27 14:29:09.406 2099 2633 I ActivityManager: START u0 {cmp=org.lineageos.setupwizard/.SetupWizardExitActivity (has extras)} from uid 1000
02-27 14:29:09.457 2099 2115 I ActivityManager: START u0 {act=android.intent.action.MAIN cat=[android.intent.category.HOME] flg=0x10000100 cmp=org.lineageos.setupwizard/.SetupWizardActivity} from uid 0
02-27 14:29:09.485 2099 2115 W ActivityManager: Finishing task with all activities already finished

edit: reverting doesn't work now, all seems lost. Time to wipe.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] alexiuss:
Anyone having this issue? I cant disable second SIM without breaking everything, once disabled, both sims keep crashing and cant be enabled again.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] mandarthedon19@gmail.com:
I used the viper 15 version i.e. available in magisk modules.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] l3ones:
What kernel are you using?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] keitaro__:
I'm using Franco kernel release 25.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] gismo2004:
Check first post: no support for non standard rom...
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] keitaro__:
Sorry about it, but I really thought it was rom problem. I didn't think about the kernel, I checked the kernel thread and it appears the problem is from there.

Thank you for pointing in the right direction
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Seferi:
Same here.. I'll be very grateful if devs could look into this issue..
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] free-sidux:
I tried the experimental too, still the same. When dirty flashing, I'm ending up booting to recovery anytime. Wiping dalvik and cache didn't help.

What logs to privide after a crash?

Cheers
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] wdh969:
Why is it slow to unlock?

from pocket to unlock very slowly
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] choukajohn:
Hi,

I use LineageOS since monday on my OnePlus 5T and everythings works fine, thanks to maintainers.

I noticed that some apps doesn't support full screen on 18:9 screen, I didn't have this issue on OOS Oreo ROM, all my apps fit perfectly the screen.

Is there any way to force all apps in full screen ?

Thanks.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] pescixx79:
me too.. tried some weather apps, but not show on widjet
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] rijads:
How can you pinch out to zoom youtube videos ?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] mestizo19:
Hi,is LOS ok for daily driver? I'm rooted on stock Oreo,is it worth it to give LOS a try for better battery and performance?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] mandarthedon19@gmail.com:
I am using sandisk dual USB pendrive. Sometimes it is not detected by device. Any help ???
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] OhioYJ:
Its fine as a daily driver. Pefromance wise its also fine, its nice to be able disable background stuff as I want. Battery performance so far I wouldn't say is better, I would say is similar.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] kikijoli:
So happy to have a stable LOS !! I found a small issue though but I had it on other ROMs too. I'm using Whatsapp beta so that might be the issue but front cam on the app does not work :(
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] tidschi:
Can confirm for stable WhatsApp, too
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] CoreGaming:
Any Changelog? :) 03 Build is running smoothly
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] codeworkx:
This one is from official lineage maintainers.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Kookitza:
Hey [MENTION=3208754]codeworkx[/MENTION], OTA is not availiable on this stage?

We need to download every build manually?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] codeworkx:
Nope. No official builds yet.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] marko94:
wow, just saw there is new build..any changelog maybe ? anyone tried ? thanks
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] pieriv59:
]Can i flash LOS 15.1 with cockwork TWRP from OOS 4.7.6 and restore data ?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] free-sidux:
Hey all,

I just got my new 5t yesterday and am happy to see so much going on here.

Coming straight from OOS 4.7.6, I unlocked, wiped, flashed.

Apparently, I should have installed an experimental of OOS 5 before, since battery life is minimum and fingerprint sensor not working at all. Any suggestions on how to tackle that problem the easiest way?

Install Oreo beta 1 first?

http://downloads.oneplus.net/oneplus-5t/oneplus_5t_oxygenos_openbeta_1/

Thanks
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] ricky.kohli:
Lol You mean [MENTION=3208754]codeworkx[/MENTION]

Similar question. I'm on OOS Oreo Beta 1, would I be able to flash this ROM and restore data? I'm using codewordx unified TWRP. Thanks in advance.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] codeworkx:
Will explode.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] ricky.kohli:
Yeah, install OOS Oreo Beta first because that includes the latest firmware, that's as per the OP "HOW TO INSTALL LINEAGEOS

- Make sure your phone is running Oreo firmware (from OxygenOS 5.0)" you should be okay once you done that.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] codeworkx:
Might work but not recommended. But probably only if not encrypted.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] free-sidux:
I was silently hoping there was some extracted firmware somewhere ...

thx anyway