Database Develop

[Q] Relocking Bootloader after installing Cyanogenmod?

Hey gang, trying to make sure I won't run into any nasty surprises before I attempt this, so;
I want to install the Unofficial Cyanogenmod ROM for the Mi 5, move away from Miui - but I also want to regain Android Pay functionality (and a few other apps I'd like to use that require a 'secure' device). For that, as far as I know, I need to relock the bootloader. So basically I'm looking to have my device that is:-
• Rooted
• Running custom ROM
• Custom recovery
• Locked Bootloader (or at least Android Pay functionality)
Installing the ROM and keeping the recovery updated and working isn't a problem, but I just want to make sure that I won't bugger something up when playing around with the bootloader. I've never had a device that's needed a bootloader unlock before, so I'm very tentative around the whole idea.
Is there anything that I need to know about relocking? Such as specific quirks with the device (I've read people have found themselves stuck in boot loops after locking) and if it's even possible to do so with a different ROM installed.
Thanks in advance!

Don't lock bootloader again, usually it causes issues(been there, done that).
But Android Pay doesn't require a locked bootloader, just unmodified system.

newbie warning: don't re-lock bootloader, and beware flashing any custom ROM. &OTA...

newbie warning: don't re-lock bootloader, and beware flashing any custom ROM. &OTA...
only modify a phone you are willing to throw away.......
##
pre-note: TWRP 3.3.1-0 -> fastboot boot twrp.img (this is temporary)
before doing anything, backup some little partitions: EFS, fsg, Vendor. Maybe others. You will need these to get back to a working stock.
##
$$
DO AT YOUR OWN RISK - I TAKE NO RESPONSIBILITY.
note added 2-27-2020: it may be that some problems with returning to stock are due to not (in TWRP) advanced wiping data, system, dalvik ART cache before flashing. You can do temp "fastboot boot twrp-3.3.1-0-payton.img" w/o quotes, and do it there. -changed/edited. don't use TWRP to flash a stock zip!
$$
NO FIX IS KNOWN FOR ANY OF THESE PROBLEMS. PHONE IS DESTROYED.
newbie warning: don't re-lock bootloader, and beware flashing ANY custom ROM.
On the X4, the bootloader changes drastically between 8 and 9 as it introduces a dual file system which is used by OTA updates to alternate the live system, and as a backup if failure. It is not a true Treble system, only partial. You must not depend on being able to flash back and forth between O and P. If you update to P, stay there. I expect this to be exacerbated by those phones which update to 10, if that in fact happens(probably One/fi only). There is also much confusion as to which file system/setup any custom ROM uses, and thus, how you would get back to stock, if that is even possible. Be very careful and assure yourself that you are fully willing to lose permanently your new phone before you do anything. Please read posts in these forums.
I've seen many posts of folks, mostly noobs, who have flashed ANY custom ROM Lineage and are unable to get back to a working stock. Sounds super simple but apparently it's not. Best to assume that if you try things, especially Lineage, that you will never be able to get back to a working stock. Read a bunch of posts here and you will realize that.
I've also seen a bunch of folks on this phone, and other phones who have run a bat file to flash their phone which contains the line
"fastboot oem lock" or similar.
Don't do it!!! - This will lock your phone and you will never be able to do anything with it again. It is totally unnecessary to lock your phone. Folks who should know better are leaving bat files lying around with this command. If you use one of those bat files to flash your phone, just check and remove that command line. Else you will have destroyed your phone. That's one of those things that "sounds good" until you do it.
EDIT: You can run stock on a bootloader unlocked phone - I do it all the time - plays PoGo just fine. I don't know about banking apps - I don't use them as I assume any 10-year-old can and will hack my phone.
EDIT: 6Feb2020: folks are reporting taking a security OTA onto a modified phone and rendering their phone(s) unusable. Only take OTA to a pure unmodified (no Majisk ever on it)(etc)(no mods ever on it)(stock recovery)(etc) stock ROM. Heed this warning. All of these "temporary" mods leave traces that screw up the update process.
EDIT: this was successfully fixed. see: https://forum.xda-developers.com/moto-x4/help/ota-update-endless-fail-loop-ppws29-69-t4045771 my guess is only works if you haven't changed bootloader or file system - NO custom ROM.
NO FIX IS KNOWN FOR ANY OF THESE PROBLEMS. PHONE IS DESTROYED.
Please do a lot of reading here before you try to modify your phone, unless you are totally willing to render it useless. A word to the wise.

Ahah ))) I bought today X4 with relocked BL and I it seems it was relocked after flashing LOS or similar )) )
Now I trying to recover it ))
Сan we boot phone to QC9008 (EDL) mode without testpoiint?

St.Noigel said:
Ahah ))) I bought today X4 with relocked BL and I it seems it was relocked after flashing LOS or similar )) )
Now I trying to recover it ))
Сan we boot phone to QC9008 (EDL) mode without testpoiint?
Click to expand...
Click to collapse
afaik, you can't. Return the phone and get your money back. There will probably be a bunch of these worthless phones put up for sale. If you can't return it you could try the suggestions of sd_shadow in other threads here, but I don't believe they were successful on the X4.

KrisM22 said:
afaik, you can't. Return the phone and get your money back. There will probably be a bunch of these worthless phones put up for sale. If you can't return it you could try the suggestions of sd_shadow in other threads here, but I don't believe they were successful on the X4.
Click to expand...
Click to collapse
OK. But I unbrick it. Now I have fully loaded system, but without WiFi ot mobile network.. It`s problem - I can`t turn on OEM unlocking.. (
Goшng to try to find solution
UPD. Everything work well now. But it my device I have custom stock flashed. Not sure it`ll work with LOS onboard

its to late for me

llue45 said:
its to late for me
Click to expand...
Click to collapse
Yeah, I know. You're one reason I posted this.

modified OP

change: from "Lineage" to "any custom ROM"

hi im thinking about buy this phone for 100 bucks used how i can verify this relocked bootloader problem ? in Developer Options ? if i cant switch to Oem Unlocking its broken ? to make sure this dont happen to me the one who its selling it to me says that already its updated to PIE , i want stock and root it just that after unlock the bootloader but if cant be unlocked i better move on . so my question is what really im looking for , when i get my hands on the phone before drop my money to the thin air because is not a store . and maybe never see this guy again in my life , i Live In The Caribbean Dominican Republic
People here are not so trusty . so i will appreciate if i can have some tips to know if im going to do a good Buy. Thanks In Advance .

JavaShin said:
hi im thinking about buy this phone for 100 bucks used how i can verify this relocked bootloader problem ? in Developer Options ? if i cant switch to Oem Unlocking its broken ? to make sure this dont happen to me the one who its selling it to me says that already its updated to PIE , i want stock and root it just that after unlock the bootloader but if cant be unlocked i better move on . so my question is what really im looking for , when i get my hands on the phone before drop my money to the thin air because is not a store . and maybe never see this guy again in my life , i Live In The Caribbean Dominican Republic
People here are not so trusty . so i will appreciate if i can have some tips to know if im going to do a good Buy. Thanks In Advance .
Click to expand...
Click to collapse
Good to not be trusting!!!! With this (or any) phone, I recommend you get only from a place (like ebay) where you can easily return it and get your money back. ebay can force a reluctant seller to refund your money. Assure that the seller has a 99% + rating and says they will accept returns and pay for return shipment, usually for 30 days. I don't think you can easily tell if it has been unlocked and re-locked - only that it works perfectly, or doesn't. You can check the ID of the ROM in your phone against the latest for your area by checking lolinet.
When you get it, check all functions and assure IMEI is present. check wifi, BT, etc etc. Make calls. Check that the phone works with the towers in your area and with a local SIM. etc etc. read here and find the things that folks having problems where it won't do things and assure your phone will do it. Install Pokemon Go on it and play it briefly to assure your phone hasn't been modified. I have no idea if any of these phone will work with any banking or payment apps, and each app will have it's own specific checks that it performs against the phone. Test what you will use. Fully. ASSUME NOTHING!!!
As far as rooting it and/or unlocking it, I would strongly advise against it. For this particular phone X4 I would determine that it works perfectly and then NOT modify it. Unless, of course, you are willing to throw your phone away and buy a new one without a second thought(most of us don't have that kind of money!). Mine happened to have been unlocked when I got it from ebay but it was on a stock 8.1 and it was able to, and did OTA update to the latest Pie stock ROM. Thus I was easily able to assure if was okay. It being unlocked seems to have affected nothing. I have never tried to root it or do anything to it (recovery or otherwise) as I read far too many posts of folks here who had rendered their phones incapable of returning to a working stock, and only on a limited custom. Not what I wanted. I have not heard of anyone successfully getting one of these phones back to a FULLY WORKING stock state.
The days of getting a phone and easily modifying it and then returning it to stock may be gone. Get a phone you will enjoy, and use it! Unmodified!!! Welcome to pre-Treble part1a . Expect a few years of growing pains.
I like my phone and enjoy not having to worry about whether a custom ROM will work and constantly be chasing updates and fixes. I use a case - I believe it is this one
https://www.ebay.com/itm/For-Motoro...hash=item33d89fee5a:m:mU5XV7jSj1TfD_kr-L4VT9g
which, so far, has protected it from several minor falls. I would never use any phone w/o a case!!!

But i think if the phone gets unlocked the bootloader and flash twrp making a backup of the stock recovery before just booting the twrp custom recovery then flash magisk on twrp on top of Stock PIE , After Of Course Make A Full Backup Of all partitions reboot and then on Stock PIE have ROOT. and never flash custom roms and never lock the bootloader and stock can be reflashed without problems with a script on linux with fastboot on bootloader-fastboot mode this plan can work , NO ? i had a E4 sprint and never had problems doing that
I need root for A Lot Of Things like Xposed Drivedroid Youtube vanced Adway ETC.
Can Anyone who is reading this have done this just root pie on this phone with unlocked bootloader ? and able to restore stock flashing it back with the retail firmware just to remove root and clean the stock and recovery ? or try to put android one ? the phone which im going to buy its the XT1900-6 retail brazil i already have the retail stock official pie rom ready to flash and with the script on linux with no fastboot oem lock anywhere .

added to OP: EDIT: 2-6-2020 folks are reporting taking a security OTA onto a modified phone and rendering their phone(s) unusable. Only take OTA to a pure unmodified (no Majisk ever on it)(etc)(no mods ever on it)(stock recovery)(etc) stock ROM. Heed this warning. All of these "temporary" mods leave traces that screw up the update process.

OTA issues
KrisM22 said:
added to OP: EDIT: 2-6-2020 folks are reporting taking a security OTA onto a modified phone and rendering their phone(s) unusable. Only take OTA to a pure unmodified (no Majisk ever on it)(etc)(no mods ever on it)(stock recovery)(etc) stock ROM. Heed this warning. All of these "temporary" mods leave traces that screw up the update process.
Click to expand...
Click to collapse
I posted a new thread on these OTA issues with the X4 at https://forum.xda-developers.com/moto-x4/help/ota-update-endless-fail-loop-ppws29-69-t4045771. I was never presented with an "option" to install the latest OTA, it just automatically attempted to install (apparently a FORCED update) and is continuing to do so and failing ad infinitum. That phone works, just getting constant failure notifications. Question is, how to stop the attempted updates?
The second identical phone (updated per Magisk OTA tutorial instructions) is borked, with no phone connectivity. Can these be recovered by wiping/flashing stock rom PPWS29.60-39-6-2 and get them operating again as stock? I can forego the OTAs if there's a way to stop them from screwing up the device.
I never had other than stock recovery on either of these phones, I always boot TWRP via fastboot to do mods.

EDIT: XDA system is stalling and caused double post. Sorry. Mod please delete.
-deleted by me -

@redwoodie , please don't post to this thread. I read all your threads/posts but have no information.
NO FIX IS KNOWN FOR ANY OF THESE PROBLEMS. PHONE IS DESTROYED.
As to whether "x" strategy will work, you are certainly free to explore that on your own, in your own thread.
No one here knows. I am certainly not going to experiment on my own phone and run the likelihood of having to buy a new one. Folks like yourself keep showing up and doing just that because they are SURE it will work. But it hasn't.
Read all the posts.
There are very few folks left here on this forum. Once they have destroyed their phone, and tried a bunch of things, they move on.
THERE IS NO SOLUTION.
This thread is only to warn newbies.
I personally know nothing about the phone other than what has been posted by others.
Read it.
If you discover a true solution that allows a phone to work perfectly ON STOCK, please post it and you will make lots of folks happy, assuming it is repeatable.
However, no known solution.
But, again, you are free to explore solutions - just not in this thread, please. Thanks.

added paragraph at top:
$$
DO AT YOUR OWN RISK - I TAKE NO RESPONSIBILITY.
note added 2-27-2020: it may be that some problems with returning to stock are due to not (in TWRP) advanced wiping data, system, dalvik-ART-cache before flashing. You can do temp "fastboot boot twrp-3.3.1-0-payton.img" w/o quotes, and do it there. -changed/edited. don't use TWRP to flash a stock zip!

This guy is full of crap
KrisM22 said:
only modify a phone you are willing to throw away.......
NO FIX IS KNOWN FOR ANY OF THESE PROBLEMS. PHONE IS DESTROYED.
Please do a lot of reading here before you try to modify your phone, unless you are totally willing to render it useless. A word to the wise.
Click to expand...
Click to collapse
I've literally put so many different custom ROMs on this phone. I've bricked it, unbricked, hard bricked it and soft bricked it. Stop misinforming people bro. The Moto G6 I would say to be careful with but still I wouldn't make a post like this guy. The Moto x4 just requires a little prep to make it a full treble, GSI accepting, custom Rom beast. Plus there are a few official ROMs out there even Android 10 for the Moto x4 specifically. Don't be scared. Just research a lot and follow instructions
---------- Post added at 03:28 PM ---------- Previous post was at 03:24 PM ----------
JavaShin said:
But i think if the phone gets unlocked the bootloader and flash twrp making a backup of the stock recovery before just booting the twrp custom recovery then flash magisk on twrp on top of Stock PIE , After Of Course Make A Full Backup Of all partitions reboot and then on Stock PIE have ROOT. and never flash custom roms and never lock the bootloader and stock can be reflashed without problems with a script on linux with fastboot on bootloader-fastboot mode this plan can work , NO ? i had a E4 sprint and never had problems doing that
I need root for A Lot Of Things like Xposed Drivedroid Youtube vanced Adway ETC.
Can Anyone who is reading this have done this just root pie on this phone with unlocked bootloader ? and able to restore stock flashing it back with the retail firmware just to remove root and clean the stock and recovery ? or try to put android one ? the phone which im going to buy its the XT1900-6 retail brazil i already have the retail stock official pie rom ready to flash and with the script on linux with no fastboot oem lock anywhere .
Click to expand...
Click to collapse
The op is a cracker Jack

Ims status not registered
Guys i flashed custom rom without taking backups of efs and all,so i ended up with ims status not registered because of that my volte is broken mine is retin.I tried to flash stock firmware but the imei is broken.Any way to fix this?

bumpsi since apparently folks are not reading this. mod a phone, likely lose it. relock a phone and def lose it.

Op 3T not bricked, all working, stock ROM, yet I CAN'T re-lock bootloader in any way

Hi all,
I am trying to relock the bootloader on 3T, with no success. I want to do it because of too many apps nagging me or not working with unlocked bootloader
here's what I did to unlock in the past and relock:
unlocking:
- enable dev options, enable oem unlocking & usb debugging
- flashed TWRP & fastboot oem unlock from command line (don't remember which I did first)
- got my phone wiped which was an an unexpected surprise!
- bootloader unlocked, the fist of those lovely warning screens telling me so
- tried to root without success, so no custom ROMs for me
- lived with it like this for a while, too many apps telling me they won't work, decided to relock
- got latest stock ROM, flashed it via TWRP, wiped, tried to fastboot oem lock ==> success reported by CLI, BUT device still unlocked
- flashed just the 3t recovery img, wiped, fastboot oem lock ==> success reported by CLI, BUT device still unlocked
- tried the qualcomm unbrick tool after installing the recommended drivers, can't have it see my device maybe because it's not bricked or maybe some other reason, I don't know. it doesn't show up in the app. Will uninstall and reactivate driver signature checks soon unless someone explains me how to make the bloody phone show up ...
So at this moment I have a many times-wiped phone with latest 9.0.4 stock ROM whose bootloader won't lock back. I am quite at a loss. I haven't tried any magisk or similat, SuperSU at the time told me I am not rooted.
I am tearing out the few hairs I have left. Any help for this poor family man so that he may not be allowed to walk in darkness? (quote from Uninvited). Thanks

Why don't you use Magisk hide to hide root/unlock status to those apps instead of loosing root/adaway and more?

pitrus- said:
Why don't you use Magisk hide to hide root/unlock status to those apps instead of loosing root/adaway and more?
Click to expand...
Click to collapse
I have never investigated Magisk, I think I installed it at the tima but there was some problem with it so I uninstalled it and didn't think much more about it. The problem is, my phone is not rooted (even though I tried it failed, I unlocked the bootloader to root it in the first place but was not successful), only OEM unblocked. So, so to say, I'm stuck in the worst of the possible worlds except for a bricked device. unlocked with no apparent way to relock it, and not rooted.
I feel like my phone is in some strange state where the normal procedures do not work. If I could at least figure out what's wrong with the rooting, I could go the full way AND then, in case use Magisk. but at the moment I feel like there is a need to put the phone in a known definite state whichever it is and work from there. I'd be happy to revert to stock and locked and then redo everything when needed in the future.
How could I troubleshoot further or get to such a "known state"? many thanks

The thing you did wrong was using the outdated SuperSU method of rooting which is not supported anymore. You should just flash the latest Magisk zip of their github page and then you will have root with the possibility of hiding it for bank apps and others.
https://github.com/topjohnwu/Magisk/releases/download/v20.4/Magisk-v20.4.zip

pitrus- said:
The thing you did wrong was using the outdated SuperSU method of rooting which is not supported anymore. You should just flash the latest Magisk zip of their github page and then you will have root with the possibility of hiding it for bank apps and others.
https://github.com/topjohnwu/Magisk/releases/download/v20.4/Magisk-v20.4.zip
Click to expand...
Click to collapse
Thanks pitrus, I'll have a look at it tomorrow and will update with what happened

MassiB said:
Thanks pitrus, I'll have a look at it tomorrow and will update with what happened
Click to expand...
Click to collapse
Hi, update. I installed Magisk but, seeing that it had a way to put the phone in EDL mode, instead of going full root I decided to go the other way around and try to make my phone as stock as possible and reserve the experiments to an unit other than my primary. So I used the Qualcomm "unbrick" tool, and was able to flash the OxygenOS version that came with it - a rather old Android 6 whose networking (wifi, mobile...) wasn't working. But an adb sideload of the latest version after having put the phone in recovery mode allowed me to restore the networking and to update to the last supported version.
Magisk made the difference in getting me out of the spot. Thanks for bringing it to my attention!

Question Can I install root on my device WITHOUT wiping any data from it?

i just want to say, i used my device for long, i dont wanna wipe my data but i want to root it. is that possible?
THX in advance

If your bootloader isn't unlocked then doing so will wipe data. If it is unlocked you can use the latest version of Magisk. Following this guide:
Magisk Root without custom Recovery and without losing Encryption
So, I unlocked my bootloader a couple of days ago, but when I got into the point of flashing TWRP, I realized that there is no custom recovery that supports device encryption. For that reason I didn't root my phone but there is a way around...
forum.xda-developers.com
Obviously you will need the correct boot.img file relevant to your specific Redmi Note 10s device extracted from an official rom.
You'll also need to enable usb debugging in the hidden developer options and configure ADB properly on your computer.
If you don't use the correct rom for your device it will get stuck in a bootloop, or just won't boot at all, requiring a hard reset and loss of all data.
There are guides for all these things on the XDA forums.
If you haven't heard of these things before, this is your main phone, or you aren't confident in your abilities then I don't recommend doing it, but it's your choice just don't blame others if something goes wrong.

stuntdouble said:
You can use the latest version of Magisk. Following this guide:
Magisk Root without custom Recovery and without losing Encryption
So, I unlocked my bootloader a couple of days ago, but when I got into the point of flashing TWRP, I realized that there is no custom recovery that supports device encryption. For that reason I didn't root my phone but there is a way around...
forum.xda-developers.com
Obviously you will need the correct boot.img file relevant to your specific Redmi Note 10s device extracted from an official rom.
You'll also need to enable usb debugging in the hidden developer options and configure ADB properly on your computer.
If you don't use the correct rom for your device it will get stuck in a bootloop, or just won't boot at all, requiring a hard reset and loss of all data.
There are guides for all these things on the XDA forums.
If you haven't heard of these things before, this is your main phone, or you aren't confident in your abilities then I don't recommend doing it, but it's your choice just don't blame others if something goes wrong.
Click to expand...
Click to collapse
okay! i think i dont wanna root it then if you give advice to not do so

Sorry I missed out the part about the bootloader which is important and edited the post above so please re-read.
Yeah if unsure then just don't do it as you could end up losing everything very easily.

KerbMario said:
i just want to say, i used my device for long, i dont wanna wipe my data but i want to root it. is that possible?
THX in advance
Click to expand...
Click to collapse
technically there is a way to unlock the bootloader without losing data but magisk is kinda fuc*ed up on MIUI, and it can cause the phone to not boot

J6idot said:
technically there is a way to unlock the bootloader without losing data but magisk is kinda fuc*ed up on MIUI, and it can cause the phone to not boot
Click to expand...
Click to collapse
isnt unlocking bootloader an option in developer mode options?

KerbMario said:
isnt unlocking bootloader an option in developer mode options?
Click to expand...
Click to collapse
it's not as simple as that, you can register to unlock your bootloader by xiaomi from the dev options, but you still have to do the unlock though your pc with the miunlock program logged into your account. This takes 7 days to verify and the moment you do it it wipes your data.
This is the official way of unlocking your bootloader and being able to do with the device whatever you want.
There is an alternative unofficial way of doing it and that method claims to not delete data on your device, but I have no idea how well that method works since it seems to rely on some sort of workaround. here's a link to the post about that method, I just did mine the official way and copied my files back and redownloaded the apps.
[Rosemary] Instant Unlock Bootloader with no data wipe
Hi I want to share with you guys how to unlock Bootloader without waiting dan best of part is your data will no wiped I am not the programmer of this software, I just want to shares All credit goes to developer: Tapin Recovery Installer Here's...
forum.xda-developers.com
also if you do decide to unlock your bootloader one way or the other, I recommend the following Kernel if you want a less throttled gaming experience.
https://forum.xda-developers.com/t/shared-kernel-beta-genom-r-kernel.4342549/

Cryptonite26 said:
it's not as simple as that, you can register to unlock your bootloader by xiaomi from the dev options, but you still have to do the unlock though your pc with the miunlock program logged into your account. This takes 7 days to verify and the moment you do it it wipes your data.
This is the official way of unlocking your bootloader and being able to do with the device whatever you want.
There is an alternative unofficial way of doing it and that method claims to not delete data on your device, but I have no idea how well that method works since it seems to rely on some sort of workaround. here's a link to the post about that method, I just did mine the official way and copied my files back and redownloaded the apps.
[Rosemary] Instant Unlock Bootloader with no data wipe
Hi I want to share with you guys how to unlock Bootloader without waiting dan best of part is your data will no wiped I am not the programmer of this software, I just want to shares All credit goes to developer: Tapin Recovery Installer Here's...
forum.xda-developers.com
also if you do decide to unlock your bootloader one way or the other, I recommend the following Kernel if you want a less throttled gaming experience.
https://forum.xda-developers.com/t/shared-kernel-beta-genom-r-kernel.4342549/
Click to expand...
Click to collapse
+1 this works

Yes its possible to not wipe data or lose it during the process at this point in time.
Just this past week (I'm new to redmi phones ) did the same process for the note 10s and note 9.
The issue with bootloader unLocking (which normally means a data wipe) is negated with mtkclient.
A Data backup is just a good standard practice but understanding the procedures posted before and following them correctly should give no issue.

You can root it by using termux too.
To root an Android phone using Termux, follow these steps:
Install Termux app from the Google Play Store
Open Termux and run pkg install git to install Git
Run git clone https://github.com/Magisk-Modules-Repo/termux-root.git to clone the root repository
Change directory with cd termux-root
Run sh install.sh to install the root tool
Restart the phone and the phone should be rooted.
Note: Rooting a phone voids its warranty and can potentially harm the device if not done carefully. Proceed at your own risk.

Question US Unlocked but using T-Mobile SIM - How to Root safely, many ??s

Long story, but after travails with an Amazon-purchased Oneplus 9 Pro due to it being locked (T-Mobile!) and them refusing to unlock it....
I went to OnePlus and got myself a OnePlus 10 Pro Unlocked. Still have the T-Mobile sim, though.
My question....
I have been out of the rooted phone scene for some time. I had a Oneplus 2 rooted and a Samsung Note 4 and 5 rooted. But things are different now, I'm gathering. Plus this is a new phone and I don't want to toss away hundreds of dollars by bricking it.
I used TWRP back in the day. Flashed many a custom rom back then. But with this OnePlus, I already unlocked it which... is that the same as rooting it? And what are the benefits of rooting / flashing roms vs just going with what is currently on this US phone (Oxygen 13 but not 13.1 yet)? I kinda want to see TWRP on here, and back up my whole set up into files I can then copy to my computer(s) for safety's sake. At least I liked that feature when I had it w/ the OP 2 and others.
Trying to get back up to speed in the world of rooting as it stands now.
Thanks.

TWRP on this device is really, "make of it what you will." It doesn't fully support this phone officially, and the leaked versions don't support device decryption, so you'll be forced to not use a passcode on your phone.
You don't need TWRP anymore, you just need to be careful and know what you're doing. There's guides for every model here, although they're all basically the same. Try to avoid flashing anything from your PC to the phone, just flash inside Magisk and BOOT images.
From my knowledge the reason for this is there's hidden partitions from OPPO all over the filesystem and normal flashers don't take this into account, anyone just trying to flash a full zip has bricked.
Which leads me to, there's no full recovery for this device that's free. If you brick a file and end up boot looping both slots, you're gonna have to pay for a restore. Even with TWRP, from what I hear, full backups sometimes fail to restore properly on this device.
TL;DR Be careful, read guides, you'll be fine. Rooting (on this device, with a lack of full recovery, hence no custom ROMs or Kernels) is really just used for audio mods, photo mods like free google photos, extensive app mods, etc. If you're not actively looking into any of these, stock Android is pretty solid.

Prant said:
TWRP on this device is really, "make of it what you will." It doesn't fully support this phone officially, and the leaked versions don't support device decryption, so you'll be forced to not use a passcode on your phone.
You don't need TWRP anymore, you just need to be careful and know what you're doing. There's guides for every model here, although they're all basically the same. Try to avoid flashing anything from your PC to the phone, just flash inside Magisk and BOOT images.
From my knowledge the reason for this is there's hidden partitions from OPPO all over the filesystem and normal flashers don't take this into account, anyone just trying to flash a full zip has bricked.
Which leads me to, there's no full recovery for this device that's free. If you brick a file and end up boot looping both slots, you're gonna have to pay for a restore. Even with TWRP, from what I hear, full backups sometimes fail to restore properly on this device.
TL;DR Be careful, read guides, you'll be fine. Rooting (on this device, with a lack of full recovery, hence no custom ROMs or Kernels) is really just used for audio mods, photo mods like free google photos, extensive app mods, etc. If you're not actively looking into any of these, stock Android is pretty solid.
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Thanks for this.
I got as far as unlocking the phone and installing Magisk. But haven't gone further until I understand what the next step is.
Can I root non-destructively? Or is the phone wiped?

If you're unlocked and have Magisk installed, rooting is as easy as booting a patched boot image, then using Magisk to install it to your boot image. You have the choice of finding a matching one in one of the guides or pulling your own from a full zip.
It must match the firmware revision, I know for a fact personally that region matters little in case of NE2215/3, as you're only doing a one time boot.
I recommend @g96818 's guide here, you can find almost every firmware's boot image posted there if you prefer patch it yourself using Magisk or just boot an already patched one.

I have a 10 Pro (NE2215) rooted as a daily driver using TMO US.
Unlocked means 2 things in the android phone scene. Either it's carrier unlocked and can take any sim from any phone company or it bootloader unlocked which is needed to root and load custom roms.
There aren't any custom roms for the 10pro because of the lack of a full recovery system. Basically the ability to force full flash a stock rom in case the custom ROM soft bricks the phone. So that leaves rooting as the reason to unlock your bootloader.
I suggest reading the guide for rooting this phone, it's relatively easy. TWRP is unnecessary as it doesn't offer much without custom ROMs. Also you should back up everything on the phone that you don't want to lose because during the rooting process a factory reset will occur (android safety feature).