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No OS installed. TWRP cannot flash new custom ROM

Hello,
I have a big problem. I don't know what to do.
I wanted to make a clean install of OxygenOS 4.5.8 and so i downloaded it, did it on SD card together with Magisk and no_verity_op5.zip (because i read that this decrypt the data).
So i cleand data and installed no_verity_op5.zip via TWRP, but when i wanted to reboot it takes way to long (i waited 30minutes but it stays on boot circle)
After that i booted into TWRP and decided to made a factory reset and to install OxygonOS 4.5.8 in a clean version. But it was not possible anymore!
When i want to install the .zip it says Patching system image unconditionally... and it loads. after the blue is full it says:
writing static_nvbk image...
patching firmware images...
script succeeded: result was [1.000000]
And when i want to boot into system it says no OS installed.
I tried also to flash this rom or even any other custom rom through ADB Sideload but it does not work. Same like above..
What can i do? I do not know what to do
I hope my phone is not bricked.
Thank you for any suggestion.

Go to oneplus 5 official download page, download stock recovery and latest stock firmware and follow instructions on the download page.... But first with TWRP take a backup of all your data because restoring stock firmware will ERASE everything... Don't panic it will works

First off, don't panic! you're not bricked as long as you can reach your bootloader and recovery.
This happened to me as well and luckily the fix is easy!
You probably tried to flash the OxygenOS build from the Oneplus downloads right?
Somehow these won't flash properly through TWRP and you must therefore also flash the Oxygen recovery image listed in the downloads.
Here are some steps that'll fix your problem.
1 - Backup all of your private data from internal storage because flashing OxygenOS will WIPE/ENCRYPT all data on your device.
2 - Go to the Oneplus download center and download both the latest OxygenOS and it's appropriate recovery:
http://downloads.oneplus.net/oneplus-5/oneplus_5_oxygenos_4.5.8
3 - Boot into your bootloader and flash the stock recovery you just downloaded. (fastboot flash recovery <recovery>.img)
4 - Boot into the Oxygen recovery and flash OxygenOS.
This should get you up and running again.
Once you get tired of OxygenOS simply reboot back into your bootloader and flash TWRP and any rom of your liking.
In the future if you want to flash OxygenOS from TWRP you have to grab a build from XDA I guess. I'm not entirely sure why flashing from within TWRP won't work with stock OOS but I believe it expects to be flashed from withing the stock recovery.
I'm pretty confident this will solve your problems.
Please backup your data first though, don't want anything to get messed up in there!
Good luck!

Ok thank you.
i will try it.
So you are right, i tried to install OxygenOS with TWRP.
So is it not possible to have official OxygenOS with TWRP, Magisk and Root?
So i cannot backup OxygenOS with TWRP?

manuelbvb said:
Ok thank you.
i will try it.
So you are right, i tried to install OxygenOS with TWRP.
So is it not possible to have official OxygenOS with TWRP, Magisk and Root?
So i cannot backup OxygenOS with TWRP?
Click to expand...
Click to collapse
It is possible to have both OxygenOS and TWRP for sure!
Only a clean flash from a non-encrypted state in TWRP seems to break stuff. You can use a modified OOS build from the forums.
TWRP can indeed backup your OOS install so that shouldn't be a problem.
The only exception seems to be flashing a clean install of OxygenOS (from Oneplus Download center) through TWRP.
Other than that everything works as expected.

Ok thank you.
So i will follow you instructions and i hope it will work.
And i think so.
And after it i will install TWRP again (because i need the backup tool), i will install magisk. will this work?
So i can use everything as in a custom rom, but cannot make a clean install? So official Oneplus OTA will work with TWRP or not?
Thank you soooo much!

Also, Magisk/root works just fine on OxygenOS.
Once you flashed OOS from the stock recovery and have everything set up simply boot into your bootloader and flash TWRP.
From there you flash Magisk and everything should be fine.
OTA's from Oneplus also install fine through TWRP as long as you go into Magisk and uninstall 'root' first. When OxygenOS tells you there's an update simply remove Magisk as I said above and it'll update fine.

Ok thank you!
It worked!!!!! I am very happy!
So i will now install TWRP, and then magisk (newest version).
I have a question, because the last time i installed magisk it did not fully work.
If i install it i have root or? But how can i get saftynet in magisk?

manuelbvb said:
Ok thank you!
It worked!!!!! I am very happy!
So i will now install TWRP, and then magisk (newest version).
I have a question, because the last time i installed magisk it did not fully work.
If i install it i have root or? But how can i get saftynet in magisk?
Click to expand...
Click to collapse
First off! YAY!! glad it worked out!
Be sure to use the TWRP build from the twrp.me website. The one listed on these forums are 'unofficial'. Not saying those are bad, but the official one has a pretty impressive track-record.
After flashing Magisk you are root-enabled so yeah, congrats you are now root! In order to pass safetynet you must enable 'magisk hide' in the magisk manager (the app that should now be installed on your phone).
If you do not have an app called 'magisk manager' then you can download this app from the magisk forums. It should however install itself while flashing the Magisk zip. So assuming you have it installed find the 'magisk hide' service and enable it.
From my experience you sometimes need to reboot in order for it to pass safetynet check.
Glad it all worked out for you!

Everything worked!
Now i have OxygenOS 4.5.8 (with OTAs in future), magisk + root + saftynet and i can install something throug TWRP and backup.
SO PERFEKT.
You are a hero

manuelbvb said:
Everything worked!
Now i have OxygenOS 4.5.8 (with OTAs in future), magisk + root + saftynet and i can install something throug TWRP and backup.
SO PERFEKT.
You are a hero
Click to expand...
Click to collapse
That's great to hear!
Enjoy and take care!

no os
sideloaded zip for rom in twrp, says successful but then no os installed and I can't find the zip anywhere in twrp. help :]

xda___ said:
sideloaded zip for rom in twrp, says successful but then no os installed and I can't find the zip anywhere in twrp. help :]
Click to expand...
Click to collapse
Can't you just connect your phone to your PC and use MTP for the file transfer? Make sure to have MTP disabled under TWRP-> Mount -> Enable MTP

Zocker1304 said:
Can't you just connect your phone to your PC and use MTP for the file transfer? Make sure to have MTP disabled under TWRP-> Mount -> Enable MTP
Click to expand...
Click to collapse
I tried, windows recognizes my phone, but when I try to transfer files it it says device is not available or has been disconnected (something like that...)

xda___ said:
I tried, windows recognizes my phone, but when I try to transfer files it it says device is not available or has been disconnected (something like that...)
Click to expand...
Click to collapse
Well just flash a different twrp via fastboot flash recovery *path to file*

Rooting OOS 10.3.1 without patched img file

I have been trying to root my device several times now using the patched img method, and all of the time it has ended up soft bricking my device.
I would really like to know how to install Magisk the proper way with TWRP installed.
Please help me out
Thank you

Install Magisk from the zip file in TWRP - you have to do tethered TWRP boot ("fastboot boot twrp.img" - the UEFI bootloader on OxygenOS 10.3.0 and later are fixed so Fastboot tethered boot works correctly now), then install TWRP the usual way from zip installer, and finally reboot back into recovery then install Magisk (also from zip installer).
Sent from my OnePlus 6T using Tapatalk

Dr. Mario said:
Install Magisk from the zip file in TWRP - you have to do tethered TWRP boot ("fastboot boot twrp.img" - the UEFI bootloader on OxygenOS 10.3.0 and later are fixed so Fastboot tethered boot works correctly now), then install TWRP the usual way from zip installer, and finally reboot back into recovery then install Magisk (also from zip installer).
Sent from my OnePlus 6T using Tapatalk
Click to expand...
Click to collapse
Does using official TWRP work?

You may want to use unofficial version as it works better than official ones (the one at twrp.me is already way outdated).
Sent from my OnePlus 6T using Tapatalk

What is update process for OP6T 9.0.16 > 10.3.3 rooted [Global]

I have OP6T OxygenOS 9.0.16 and I would like to update it to the latest 10.3.3 with root.
What should be my process of doing so? I have not been in touch with rooting for the past 3 years so I don't want to mess things up. Another note is that while I am on OxygenOS 9.0.16 I tried to root it which was failed, but now few banking and calling apps such as TextNow thinks that my phone is rooted and they can not run -- but my phone is not properly rooted according to root verification apps.
Please tell me how should I do the update to the latest version from this point and then I would like to unlock bootloader and install recovery and root it as well.
Please advice.
BTW my OP6T is global

a4abbas said:
I have OP6T OxygenOS 9.0.16 and I would like to update it to the latest 10.3.3 with root.
What should be my process of doing so? I have not been in touch with rooting for the past 3 years so I don't want to mess things up. Another note is that while I am on OxygenOS 9.0.16 I tried to root it which was failed, but now few banking and calling apps such as TextNow thinks that my phone is rooted and they can not run -- but my phone is not properly rooted according to root verification apps.
Please tell me how should I do the update to the latest version from this point and then I would like to unlock bootloader and install recovery and root it as well.
Please advice.
BTW my OP6T is global
Click to expand...
Click to collapse
Hello,
Here is a link that will help you out with this update process:
https://forum.xda-developers.com/oneplus-6t/how-to/official-oxygenos-9-0-4-ota-oneplus-6t-t3860953

a4abbas said:
I have OP6T OxygenOS 9.0.16 and I would like to update it to the latest 10.3.3 with root.
What should be my process of doing so? I have not been in touch with rooting for the past 3 years so I don't want to mess things up. Another note is that while I am on OxygenOS 9.0.16 I tried to root it which was failed, but now few banking and calling apps such as TextNow thinks that my phone is rooted and they can not run -- but my phone is not properly rooted according to root verification apps.
Please tell me how should I do the update to the latest version from this point and then I would like to unlock bootloader and install recovery and root it as well.
Please advice.
BTW my OP6T is global
Click to expand...
Click to collapse
Flash OOS full rom zip on both slots using TWRP also flash TWRP installer zip on both slots reboot recovery flash magisk reboot system. Easy peasy.
Example:
Boot recovery: fastboot boot twrp.img
flash OOS 10.3.3 full rom zip
flash TWRP installer zip, reboot recovery,
flash OOS 10.3.3 full rom zip, format data, wipe data,
flash TWRP installer zip
Reboot recovery, flash magisk,
reboot system.
Note: I use a USB stick. I flash magisk zip off my USB stick.
That's what I do when I use OOS on my 6t far as installation goes.
Edited

flash713 said:
Flash OOS full rom zip on both slots using TWRP also flash TWRP installer zip on both slots reboot recovery flash magisk reboot system. Easy peasy.
Example:
Boot recovery: fastboot boot twrp.img
flash OOS 10.3.3 full rom zip
flash TWRP installer zip, reboot recovery,
flash OOS 10.3.3 full rom zip, format data, wipe data,
flash TWRP installer zip
Reboot recovery, flash magisk,
reboot system.
Note: I use a USB stick. I flash magisk zip off my USB stick.
That's what I do when I use OOS on my 6t far as installation goes.
Edited
Click to expand...
Click to collapse
Are you sure there is no need to update to 9.0.17 and then 10.3.3?
I've asked once and someone said that 9.0.17 is neccessary before update to 10.3.x.
Also there is option to flash from system without losing magisk modules:
1. Flash manually from update center (do not reboot)
2. Enter magisk and flash to another slot (after OTA)
3. Flash TWRP installer like magisk module
4. Reboot
But I'm not sure if I remember it correctly.

Michalec said:
Are you sure there is no need to update to 9.0.17 and then 10.3.3?
I've asked once and someone said that 9.0.17 is neccessary before update to 10.3.x.
Also there is option to flash from system without losing magisk modules:
1. Flash manually from update center (do not reboot)
2. Enter magisk and flash to another slot (after OTA)
3. Flash TWRP installer like magisk module
4. Reboot
But I'm not sure if I remember it correctly.
Click to expand...
Click to collapse
10.3.3 is all that you need. 9.0.17 isn't the only way anymore.

Michalec said:
Are you sure there is no need to update to 9.0.17 and then 10.3.3?
I've asked once and someone said that 9.0.17 is neccessary before update to 10.3.x.
Also there is option to flash from system without losing magisk modules:
1. Flash manually from update center (do not reboot)
2. Enter magisk and flash to another slot (after OTA)
3. Flash TWRP installer like magisk module
4. Reboot
But I'm not sure if I remember it correctly.
Click to expand...
Click to collapse
I have a T-Mobile SIM unlock OnePlus 6t and I converted it to an international model so when my conversation was done I was on OOS 9.0.1.1 and I booted TWRP and installed 10.3.4 full rom on both slots and also recovery installer and all just like my previous posts stated and everything went fine. I used mauronofrio's TWRP the version just before the latest 3.4xx when I did this.
I always download quite a bit of various firmwares and also TWRP versions before I start flashing things just in case something goes wrong I already have other things maybe I can use and I don't have to stop and wait for some download to finish... And I'm quite sure you know this but definitely make a backup of everything beforehand to USB or transfer it to your pc just in case you end up needing it as a precaution.
Edit added:
I am assuming that you already unlocked your bootloader... I believe everyone knows to do that that's on XDA forums before you can do anything to any device .. I say this after reading post below me here. I guess I should have said that earlier but I just assume everyone knows that on the forums... My bad. ??
From fastboot on Linux PC:
sudo fastboot oem unlock (then hit enter on keyboard) use volume keys to move to unlock option and your Power button to select it and confirm. For more info see: https://www.xda-developers.com/oneplus-6t-unlock-bootloader-root/
Super easy to unlock bootloader just remember it does wipe your device clean so move anything to want to PC or USB stick first...

I would think you could just update oxygenOS to latest then re-root no? Assuming your already bootloader unlocked which it seems like would be the case if you have an obsolete magisk installation.
Edit: re-reading your post maybe it is not unlocked as you failed to root. In this case just unlock then flash the latest fastboot image and then magisk as others have already stepped you through. You will lose data when you unlock so backup first.

So if I'm on 9.0.16 I could flash latest OOS directly from TWRP and then flash magisk? And no data loss? Of course I'm rooted with bootloader unlocked.

Oh dear this process is getting harder because recently I was busy doing other things it sounds way harder it actually is. Isnt there a way I pay someone on this forum so that user help me do this. Like download stuff links and proper version and follow me up with it because i want to do this without messing things up!

a4abbas said:
Oh dear this process is getting harder because recently I was busy doing other things it sounds way harder it actually is. Isnt there a way I pay someone on this forum so that user help me do this. Like download stuff links and proper version and follow me up with it because i want to do this without messing things up!
Click to expand...
Click to collapse
It is indeed a tough job. This A/B partition has had a lot of people bootloop/soft bricked their phones.
However, you need not pay anybody anything. If you are on stock, I would've recommended you upgrading it via Oxygen updater (a 3rd party app on the play store) and then using the latest recoveries (TWRP 3.4) and flashing it via Fastboot mode.
It is super easy.

twrp versions for after msmtool 9.0.11

The latest TWRP img was leaving me stuck with a fastboot screen, assumed twrp version was too high EVEN THOUGH EVERYWHERE I was seeing "It is recommended you flash latest twrp" and NOTHING about what TWRP is for what Android version WTF!
So yeah I just got 3.2.3-2 to work, now wondering if I should install latest TWRP zip after flashing the 9.0.17 or after flashing the OOS 11.1.1.1? Can you install the latest TWRP zip while using an earlier TWRP img??

How to flash OxygenOS via fastboot or TWRP?

Hi, my device is currently without an OS after a full wipe. I have fastboot access and latest 3.6 TWRP recovery.
Can someone please share the link to last updated Android 10 OxygenOS stock ROM and how to flash it?
Also, how can I root via Magisk after installing OOS?

myblessayu said:
Hi, my device is currently without an OS after a full wipe. I have fastboot access and latest 3.6 TWRP recovery.
Can someone please share the link to last updated Android 10 OxygenOS stock ROM and how to flash it?
Also, how can I root via Magisk after installing OOS?
Click to expand...
Click to collapse
Curious why you want a10? The latest oos is a11. You just flash the zip for oos in twrp. It will replace your recovery so always reflash twrp after if you want it. Magisk can also be installed from twrp.

Brettroth said:
Curious why you want a10? The latest oos is a11. You just flash the zip for oos in twrp. It will replace your recovery so always reflash twrp after if you want it. Magisk can also be installed from twrp.
Click to expand...
Click to collapse
Wasn't my device so had to go with A10. Was able to install OS, recovery and root using THIS thread.
Thanks for the response anyway!