[ROM][11.0_r56]JAGUAR ONEPLUS 8 OFFICIAL V21 Updated June 7, 2022

[optimumpro]

Hello,

I have msm my phone and I have your recovery now. How do I flash the Oxygen Rom on both slots using your recovery? Or do I have to use Twrp and go back to your recovery.

Can you give detailed instructions because I am new at this, but I'd really like to use your Rom.

Lineage type recoveries cannot flash OOS. So, after MSM, unlock bootloader and boot official TWRP from fastboot: Open PC terminal in the directory you put TWRP image, connect the phone in fastboot mode and execute:

'fastboot boot "recovery name" (without quotes).

You'll boot into TWRP and then flash OOS-11 the second time. After that follow instructions, i.e., flash my recovery and sideload the rom. Pick either vanilla or full (with Gapps) version. After flashing Jaguar don't forget to do a factory reset. Otherwise, you won't boot.

 

[Libraplum76]

Lineage type recoveries cannot flash OOS. So, after MSM, unlock bootloader and boot official TWRP from fastboot: Open PC terminal in the directory you put TWRP image, connect the phone in fastboot mode and execute:

'fastboot boot "recovery name" (without quotes).

You'll boot into TWRP and then flash OOS-11 the second time. After that follow instructions, i.e., flash my recovery and sideload the rom. Pick either vanilla or full (with Gapps) version. After flashing Jaguar don't forget to do a factory reset. Otherwise, you won't boot.

Thank you.

So is this the same process when updating your Rom for the future? I am only asking because I never want to lose data, or is there another process to updating your Rom to prevent data loss. Detailed information is truly appreciated.

 

[optimumpro]

Thank you.

So is this the same process when updating your Rom for the future? I am only asking because I never want to lose data, or is there another process to updating your Rom to prevent data loss. Detailed information is truly appreciated.

No. You format data only when changing roms. Since you already have OOS-11, even when changing to another custom rom, 11 or 12, you won't need to use MSM, because you already have OOS11 firmware in both slots.

So, when updating Jaguar, you just sideload/flash the update without wiping data, i.e., all your settings will survive.

 

[cjvzla]

You need to downgrade to OOS11 in both slots. MSM tool does one slot only. So, flash OOS11 twice (with reboot in between). You can flash recovery once only.

The adb sideload is done in recovery, not fastbootd. This only applies to lineage type recovery. TWRP can flash the rom directly.

so I can't flash twrp and flash official OOS11? do I have to use the msm tool? or alternatively, follow the official oneplus steps to downgrade? I have already downloaded official OOS11 just in case of this.

 

[optimumpro]

so I can't flash twrp and flash official OOS11? do I have to use the msm tool? or alternatively, follow the official oneplus steps to downgrade? I have already downloaded official OOS11 just in case of this.

There are 2 ways:

1. Use MSM tool to downgrade to OOS-11; unlock bootloader; boot (or flash) TWRP and flash OOS-11 the second time.

2. Don't use MSM tool at all, instead: boot TWRP and flash OOS-11. Boot once in system; then go to fastboot and boot TWRP (because OOS-11 installs its own recovery); flash OOS-11 the second time.

 

[cjvzla]

There are 2 ways:

1. Use MSM tool to downgrade to OOS-11; unlock bootloader; boot (or flash) TWRP and flash OOS-11 the second time.

2. Don't use MSM tool at all, instead: boot TWRP and flash OOS-11. Boot once in system; then go to fastboot and boot TWRP (because OOS-11 installs its own recovery); flash OOS-11 the second time.

thanks for the replies I really appreciate it, but what exactly you mean to flash oos11 and boot in system? correct me if I'm wrong please:

boot official TWRP and flash official OOS11
boot that OOS11 rom I just flashed ( go through all set up process since it will wipe everything?)
boot TWRP again and flash the official OOS11 again?

what are the differences flashing it twice? what do I select when flashing the first time and the second time?

it's been a while since I installed roms on android I use to do it all the time. sorry for so many questions.

 

[optimumpro]

thanks for the replies I really appreciate it, but what exactly you mean to flash oos11 and boot in system? correct me if I'm wrong please:

boot official TWRP and flash official OOS11
boot that OOS11 rom I just flashed ( go through all set up process since it will wipe everything?)
boot TWRP again and flash the official OOS11 again?

what are the differences flashing it twice? what do I select when flashing the first time and the second time?

it's been a while since I installed roms on android I use to do it all the time. sorry for so many questions.

Read about A/B system. You basically have 2 sets (slots) of partitions, except for data, which is shared. It's called 'seamless update'. Initial rom is flashed on one slot, the next time, it will automatically go to another one. Then the next update will go to the first one (again) and so on. This is done so that if something goes wrong with the update, you can still boot the older version.

So, when you do MSM, the rom goes into one slot only, let's say slot A. Once you boot into recovery and flash OOS again, this time it will go to slot B.

Keep in mind that roms always go to another slot, but addons (like Magisk) go to the existing slot. So, if after flashing the rom, you want Magisk or Gapps, you need to reboot to recovery to change to a new slot. Again, this is done automatically.

 

[cjvzla]

Read about A/B system. You basically have 2 sets (slots) of partitions, except for data, which is shared. It's called 'seamless update'. Initial rom is flashed on one slot, the next time, it will automatically go to another one. Then the next update will go to the first one and on. This is done so that if something goes wrong with the update, you can still boot the older version.

So, when you do MSM, the rom goes into one slot only, let's say slot A. Once you boot into recovery and flash OOS again, this time it will go to slot B.

Keep in mind that roms always go to another slot, but addons (like Magisk) go to the existing slot. So, if after flashing the rom, you want Magisk or Gapps, you need to reboot to recovery to change to a new slot. Again, this is done automatically.

thanks for the explainer! so the last OOS11 official release will work for this right? flash it twice, then I'm good to flash Jaguar or any other Android 11 custom rom? thanks

 

[optimumpro]

thanks for the explainer! so the last OOS11 official release will work for this right? flash it twice, then I'm good to flash Jaguar or any other Android 11 custom rom? thanks

Yes. Just reboot between flashes, if not using MSM. Otherwise, if you don't reboot, the rom will go to the same slot. Let's put it this way: after MSM, the rom is in slot A, which is your active slot. When you flash the rom again with recovery, it will go to slot B, which on reboot becomes your new Active slot. Roms always go into Inactive slot, addons always go into your Active one.

 

[cjvzla]

Yes. Just reboot between flashes, if not using MSM. Otherwise, if you don't reboot, the rom will go to the same slot. Let's put it this way: after MSM, the rom is in slot A, which is your active slot. When you flash the rom again with recovery, it will go to slot B, which on reboot becomes your new Active slot. Roms always go into Inactive slot, addons always go into your Active one.

thanks!, and if I want to flash Android 12 roms do I still need to downgrade? or flashing the rom twice will be enough?

 

[optimumpro]

thanks!, and if I want to flash Android 12 roms do I still need to downgrade? or flashing the rom twice will be enough?

You only need to flash twice when coming from a stock rom. The difference between stock and custom roms is that custom roms don't touch firmware partitions. OOS includes everything. So, when returning to OOS-12, just flash it either with TWRP or MSM.

Custom Android 12 roms run on OOS-11 firmware, so, when switching between custom roms you don't need to flash OOS, just do a factory reset to erase data partition..

 

[scorpio76r]

Check Safetynet CTS.

I can confirm that latest magisk 24.3 works when enabling zygisk but, for some reason I cannot get it to install 23.0 . I'm currently wondering if everyone is just using latest magisk right now and, not the 23.0? also if everyone is, how do you check safety net in it. Unless I overlooked something, I didn't see a safety net check option like what's found in 23.0

 

[optimumpro]

I can confirm that latest magisk 24.3 works when enabling zygisk but, for some reason I cannot get it to install 23.0 . I'm currently wondering if everyone is just using latest magisk right now and, not the 23.0? also if everyone is, how do you check safety net in it. Unless I overlooked something, I didn't see a safety net check option like what's found in 23.0

There are various apps on the market that can check Safetynet... .

 

[scorpio76r]

There are various apps on the market that can check Safetynet... .

So I guess that I should give up on getting 23.0 to work? Just go with the latest magisk?

 

[optimumpro]

So I guess that I should give up on getting 23.0 to work? Just go with the latest magisk?

What exactly do you get when installing Magisk 23?

 

[scorpio76r]

What exactly do you get when installing Magisk 23?

I just got it to install. Im going to see if safety net passes in a few minutes. I was just persistent about getting 23.0

 

[scorpio76r]

I just got it to install. Im going to see if safety net passes in a few minutes. I was just persistent about getting 23.0

Magisk 23.0 could not pass safety net for me. I did get it to pass on the latest magisk though with the help of a few modules, termux from the play store.

 

[optimumpro]

Magisk 23.0 could not pass safety net for me. I did get it to pass on the latest magisk though with the help of a few modules, termux from the play store.

Good. Why don't you share exactly what you did to pass Safetynet.

 

[scorpio76r]

Good. Why don't you share exactly what you did to

Good. Why don't you share exactly what you did to pass Safetynet.

I will explain soon. What I'm doing now is working on another device to see if I can achieve the same without losing data. I msm'd and started from scratch out of frustration with not being able to get magisk 23.0 to work correctly. If I can achieve the same on this other device it will save people some work and they will have great results without data loss. I will be back in a few...

 

[scorpio76r]

Ok, mission accomplished on second device with no data loss. Here's what I did:
I downloaded the latest 24.3 Magisk zip on the one plus 8. Next, I downloaded the TWRP-3.6.1_11-0-instantnoodle image and put it inside the adb folder on my windows 10 pc. Next, I rebooted the phone into fast boot mode. After plugging the phone to the pc I opened up PowerShell in the adb folder ( fastboot devices) Saw the serial number then typed the next command (fastboot boot, then dragged the image and hit enter. Once phone booted into twrp I flashed the latest magisk that I downloaded to the phone earlier. Then I rebooted system. Next I went online from the phone to grab the 24.3 apk. downloaded and installed.After installing , I opened it , went into the settings and ticked zygisk beta . I also hid the magisk app and,ticked enforce deny list. Next I went back online from the phone and found and,installed safety net universal fix version 2.2.1 via magisk. Next, I went back online to find magisk hide props 6.1.2 zip which I also installed via magisk.lastly I downloaded termux from the play store. Once I opened termux type:su then props then 1, then f, then 21,then 35, then 2,then y,then y. Reboot . Hopefully you this works for everyone. It worked for me on two one plus 8's. I used Root and SafetyNet Checker( it has a Pink Pound sign picture) from the play store to verify.