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How to downgrade from 5.1.8 to 5.1.7?

Hello, i'm currently on oos 5.1.8 with twrp and magisk installed, I'm facing battery draining and would like to downgrade to 5.1.7, is this possible? If so how can i do that?
Thanks

Were you on 5.1.7 before going to 5.1.8. If so, all you have to do is reboot to twrp and change slot to other 1. Then for me because i use custom kernel so i reflash kernel and magisk and you should be go to go.

MrSteelX said:
Were you on 5.1.7 before going to 5.1.8. If so, all you have to do is reboot to twrp and change slot to other 1. Then for me because i use custom kernel so i reflash kernel and magisk and you should be go to go.
Click to expand...
Click to collapse
I flashed oos 5.1.8 full OTA via fastboot, so i dont think this would work, correct me if i'm wrong

What i done.
1st, be sure to have a backup incase of the worst!
Have 5.1.7 zip, twrp and magisk on your internal storage.
Boot to twrp and install 5.1.7 zip,immediately flash twrp zip and magisk zip. Clear cache. Jobs a good one!!!

hallo dare said:
What i done.
1st, be sure to have a backup incase of the worst!
Have 5.1.7 zip, twrp and magisk on your internal storage.
Boot to twrp and install 5.1.7 zip,immediately flash twrp zip and magisk zip. Clear cache. Jobs a good one!!!
Click to expand...
Click to collapse
This wipes data, right? My phone with be restoring the backup once I do this process, correct? And by wiping I mean the OS and app data, not necessarily user data (pictures/files)

surface13 said:
This wipes data, right? My phone with be restoring the backup once I do this process, correct? And by wiping I mean the OS and app data, not necessarily user data (pictures/files)
Click to expand...
Click to collapse
Nothing of mine was wiped. That's not to say it won't happen someone else and mine was just a fluke.

No wipe will happen unless you tell it to wipe.

kurotsukiii said:
Hello, i'm currently on oos 5.1.8 with twrp and magisk installed, I'm facing battery draining and would like to downgrade to 5.1.7, is this possible? If so how can i do that?
Thanks
Click to expand...
Click to collapse
wrong approach, it's always user space if battery drains except if there is a know bug.
absolutely top battery life here last time i got this was on nexus 5 and 6 after a lot of work with xposed and the likes.
in case you can't resolve this start to freeze apps and activate them one after another to see which was is draining.
of course there are other factors, normally i'd recommend a clean incremental install with frequent backups but then i'm reluctant to
recommend this now for this device even though it would work to find the culprit.
thing is that too many don't get the A/B thingy and some related differences under control yet and i don't want to be responsible for
even more hassle

magnamentis said:
wrong approach, it's always user space if battery drains except if there is a know bug.
absolutely top battery life here last time i got this was on nexus 5 and 6 after a lot of work with xposed and the likes.
in case you can't resolve this start to freeze apps and activate them one after another to see which was is draining.
of course there are other factors, normally i'd recommend a clean incremental install with frequent backups but then i'm reluctant to
recommend this now for this device even though it would work to find the culprit.
thing is that too many don't get the A/B thingy and some related differences under control yet and i don't want to be responsible for
even more hassle
Click to expand...
Click to collapse
I've had shocking battery life with the update to 5.1.8, hence having to downgrade and battery life is perfect again. I tried a fresh install, clearing cache, freezing apks, uninstalling apks, but no difference. I've filed a bug report with Oneplus and sent the log details to them of what they requested. It's a common issue in the OP forums.

MrSteelX said:
Were you on 5.1.7 before going to 5.1.8. If so, all you have to do is reboot to twrp and change slot to other 1. Then for me because i use custom kernel so i reflash kernel and magisk and you should be go to go.
Click to expand...
Click to collapse
Thanks man, that worked for me no more drainage

hallo dare said:
I've had shocking battery life with the update to 5.1.8, hence having to downgrade and battery life is perfect again. I tried a fresh install, clearing cache, freezing apks, uninstalling apks, but no difference. I've filed a bug report with Oneplus and sent the log details to them of what they requested. It's a common issue in the OP forums.
Click to expand...
Click to collapse
To be honest it has to be specific to your device. I have two devices running on 5.1.8 since days and battery life is great.

devnerd said:
To be honest it has to be specific to your device. I have two devices running on 5.1.8 since days and battery life is great.
Click to expand...
Click to collapse
Then Oneplus has a serious issue on its hands with devices going to be returned

hallo dare said:
What i done.
1st, be sure to have a backup incase of the worst!
Have 5.1.7 zip, twrp and magisk on your internal storage.
Boot to twrp and install 5.1.7 zip,immediately flash twrp zip and magisk zip. Clear cache. Jobs a good one!!!
Click to expand...
Click to collapse
I'll be using the twrp bootable image to boot to twrp. Will I still have to flash twrp zip after flashing 5.1.7? Or can I just flash magisk zip?

surface13 said:
I'll be using the twrp bootable image to boot to twrp. Will I still have to flash twrp zip after flashing 5.1.7? Or can I just flash magisk zip?
Click to expand...
Click to collapse
You will have to flash twrp and magisk

What is the proper way to move from one rom to another?

I have tried a couple of roms and I always end up bricking my phone when I try to move from one of the flashed roms back to OOS and have to resort to using msmtool and start over with 5.1.5.
Can someone please guide and advise on the best practices for flashing roms and then going back to stock. Thanks

Depends what roms you are trying to go from.. And what security patch the first rom is on.
When going back from let's say September to July you will have to format phone only to install oos again.
How have you done the procedure when you brick it?

whizeguy said:
Depends what roms you are trying to go from.. And what security patch the first rom is on.
When going back from let's say September to July you will have to format phone only to install oos again.
How have you done the procedure when you brick it?
Click to expand...
Click to collapse
Thanks for your kind reply, I format system, data & dalvik partitions & then install OOS and always end up with a bricked phone.

I believe format
Install twrp
Reboot to twrp
Install oos, install twrp
Reboot to twrp
Install oos, install twrp
Reboot to twrp
Minstall magisk
So you get it on both partitions

faisalsiddiqui said:
Thanks for your kind reply, I format system, data & dalvik partitions & then install OOS and always end up with a bricked phone.
Click to expand...
Click to collapse
you mean encrypted? should be fixed with a format, or rather it's the only way afaik..
proper way is to take backups and keep off of phone, so that if you're going down android security patches(not sure what else, if anything triggers it), you'll have needed data on hand

When you switch from one rom to other Format data it's the way.
When you want to go back from Android 9 to android 8 you need to install a rollback rom.
Oos allways encripts youre phone and you will go back to Oos recovery.

Flashing disaster!

First I have an admission - I'm 82 so my memory is not as good as it was. I have been using smartphones for some years now including flashing recoveries and operating systems. This time, however, I have got myself into a real mess.
I have a OnePlus 6 and just recently there was an OxygenOS update from OnePlus which I installed in the normal OTA way. It was only a little later that I realised that I'd updated from Oreo (8.1) to Pie (9) and there was not a version of Xposed for Pie. I want Xposed so I decided that I wanted to downgrade to Oreo. It didn't occur to me that it would be any more difficult than re-flashing the previous version of OxygenOS. I now realise it isn't that easy or, at least, it doesn't appear to be.
Having flashed Oreo the phone wouldn't boot. It got as far as the boot animation and stayed there. I thought the best thing then would be to try and get back to Pie so I reflashed that. At least the phone now booted but I soon realised that some things weren't right. For example if I turn on wifi it turns off again after about two seconds so I can't use wifi at all.
I'm not sure what to do now. I do have a TWRP backup for both Pie and the previous Oreo. Would it be possible to restore one of those (preferable Oreo)? I'm a bit nervous about trying that as I'm not sure how much wiping/restore I'd need to do. There is the Vendor partition (I've not seen that before) and I would be very nervous about wiping and restoring the boot partition which now, I believe, contains the recovery.
I hoping that some kind person will offer some advice to put me on the road to recovery (No pun intended).

First of all, I'm impressed that you have done as much as you have (or even wanted to for that matter) at 82. Most older people I know (I'm 42 btw)barely know how to use there phones in the os, much less know what recovery is, lol.
Anyway, I'm pretty sure I've read that with you go backwards to Oreo from pie, you need to do a full wipe including storage. Did you do that?

BarrySamuels said:
First I have an admission - I'm 82 so my memory is not as good as it was. I have been using smartphones for some years now including flashing recoveries and operating systems. This time, however, I have got myself into a real mess.
I have a OnePlus 6 and just recently there was an OxygenOS update from OnePlus which I installed in the normal OTA way. It was only a little later that I realised that I'd updated from Oreo (8.1) to Pie (9) and there was not a version of Xposed for Pie. I want Xposed so I decided that I wanted to downgrade to Oreo. It didn't occur to me that it would be any more difficult than re-flashing the previous version of OxygenOS. I now realise it isn't that easy or, at least, it doesn't appear to be.
Having flashed Oreo the phone wouldn't boot. It got as far as the boot animation and stayed there. I thought the best thing then would be to try and get back to Pie so I reflashed that. At least the phone now booted but I soon realised that some things weren't right. For example if I turn on wifi it turns off again after about two seconds so I can't use wifi at all.
I'm not sure what to do now. I do have a TWRP backup for both Pie and the previous Oreo. Would it be possible to restore one of those (preferable Oreo)? I'm a bit nervous about trying that as I'm not sure how much wiping/restore I'd need to do. There is the Vendor partition (I've not seen that before) and I would be very nervous about wiping and restoring the boot partition which now, I believe, contains the recovery.
I hoping that some kind person will offer some advice to put me on the road to recovery (No pun intended).
Click to expand...
Click to collapse
grab this file. http://oxygenos.oneplus.net.s3.amazonaws.com/OnePlus6Oxygen_22_OTA_007_all_1805131952_O_MR1.zip flash that to be back on Oreo 5.1.5. this is the special roll back firmware.
also, this will wipe all data as well as internal storage. just putting that out there so you know before doing it.

b.huss2 said:
Anyway, I'm pretty sure I've read that with you go backwards to Oreo from pie, you need to do a full wipe including storage. Did you do that?
Click to expand...
Click to collapse
No, it was something I was trying to avoid. I was working on the assumption that as going from Oreo to Pie didn't involve any loss of data/internal storage then going from Pie to Oreo wouldn't either.
MrSteelX said:
grab this file. http://oxygenos.oneplus.net.s3.amazonaws.com/OnePlus6Oxygen_22_OTA_007_all_1805131952_O_MR1.zip flash that to be back on Oreo 5.1.5. this is the special roll back firmware.
also, this will wipe all data as well as internal storage. just putting that out there so you know before doing it.
Click to expand...
Click to collapse
As I said above I was trying to avoid wiping data/internal storage but if that is the only way then I'll have to do it. I do have a backup of my internal storage so I can replace that easily enough. Would my Oreo backup be of any use after the wipe to restore my original data setup? That version of OxygenOS was 5.1.11 so could I get back to that?
I thank you both for your very timely help.
P.S. Can you see anything wrong with this plan?
1. Flash the roll back firmware.
2. Install TWRP using Fastboot
3. Flash, using TWRP, OxygenOS v5.1.11 over the roll back firmware
4. Restore 'data' from my previous TWRP backup.
5. Restore internal storage from backup.

BarrySamuels said:
1. Flash the roll back firmware.
2. Install TWRP using Fastboot
3. Flash, using TWRP, OxygenOS v5.1.11 over the roll back firmware
4. Restore 'data' from my previous TWRP backup.
5. Restore internal storage from backup.
Click to expand...
Click to collapse
I would think that should get you back to where you were. I have not personally been through these specific steps, but seems logical. It's def worth a try.

b.huss2 said:
I would think that should get you back to where you were. I have not personally been through these specific steps, but seems logical. It's def worth a try.
Click to expand...
Click to collapse
going from oreo to pie, no data loss.
going from pie to oreo, data loss.
that is how it is done. after coming back to 5.1.5 then you can go to 5.1.11

MrSteelX said:
going from oreo to pie, no data loss.
going from pie to oreo, data loss.
that is how it is done. after coming back to 5.1.5 then you can go to 5.1.11
Click to expand...
Click to collapse
I think that's kind of understood at this point. However, I see no problem with restoring a Oreo backup once he's back on Oreo.

BarrySamuels said:
No, it was something I was trying to avoid. I was working on the assumption that as going from Oreo to Pie didn't involve any loss of data/internal storage then going from Pie to Oreo wouldn't either.
As I said above I was trying to avoid wiping data/internal storage but if that is the only way then I'll have to do it. I do have a backup of my internal storage so I can replace that easily enough. Would my Oreo backup be of any use after the wipe to restore my original data setup? That version of OxygenOS was 5.1.11 so could I get back to that?
I thank you both for your very timely help.
P.S. Can you see anything wrong with this plan?
1. Flash the roll back firmware.
2. Install TWRP using Fastboot
3. Flash, using TWRP, OxygenOS v5.1.11 over the roll back firmware
4. Restore 'data' from my previous TWRP backup.
5. Restore internal storage from backup.
Click to expand...
Click to collapse
Almost. You are missing one thing.
1. Flash the roll back firmware
2. Install TWRP using fastboot
3. Flash, using TWRP, OxygenOS 5.1.11
4. Before rebooting, FLASH TWRP IN TWRP (This is important, as flashing 5.1.11 will overwrite recovery)
5. Use your TWRP backup
6. Do what you need for files you want on internal storage.
Don't forget to flash TWRP after you update to 5.1.11.

Not having much luck. I flashed the roll back firmware, and twrp, then rebooted but I got the boot animation again and it wouldn't go any further. I re-downloaded the firmware again, in case there was any corruption, and re-flashed it without flashing twrp but got as far as the boot animation again but no further.
Whilst in TWRP I used the file manager to look at internal storage and nothing had been wiped from that.
I'm not sure what to do now so any suggestions would be very welcome.

BarrySamuels said:
Not having much luck. I flashed the roll back firmware, and twrp, then rebooted but I got the boot animation again and it wouldn't go any further. I re-downloaded the firmware again, in case there was any corruption, and re-flashed it without flashing twrp but got as far as the boot animation again but no further.
Whilst in TWRP I used the file manager to look at internal storage and nothing had been wiped from that.
I'm not sure what to do now so any suggestions would be very welcome.
Click to expand...
Click to collapse
Fastboot working correctly - try flashing the fastboot Rom. Hopefully that will put you back to square one where you start over. Complete wipe though!
https://forum.xda-developers.com/oneplus-6/how-to/rom-stock-fastboot-roms-oneplus-6-t3796665

Use the fastboot ROM recovery. It works (I've used it twice) no data wipe.

chazey2 said:
Fastboot working correctly - try flashing the fastboot Rom. Hopefully that will put you back to square one where you start over. Complete wipe though!
https://forum.xda-developers.com/oneplus-6/how-to/rom-stock-fastboot-roms-oneplus-6-t3796665
Click to expand...
Click to collapse
That does sound rather hairy especially as I don't know which one I'd need to use. It does mention that it should not be used to upgrade or downgrade and I'm not sure that I, or my phone, knows which version is currently installed.
ADDENDUM:
I decided to try one more thing of my own. I wiped data and re-flashed the Pie version of OxygenOS then rebooted.
:laugh: It booted and seemed to be working properly i.e. I could use wifi and the time doesn't keep being lost.
I have now installed Blu Spark TWRP and restored my 'data' backup and I am now back to where I was before all this started. It isn't really where I want to be because I have no Xposed but it is significantly better than a non-booting phone. I'll just have to wait for a new version of Xposed (if such ever appears).
I really don't know why those other suggestions didn't work.
Very many thanks to all those who offered support; it certainly does give a morale boost.

BarrySamuels said:
That does sound rather hairy especially as I don't know which one I'd need to use. It does mention that it should not be used to upgrade or downgrade and I'm not sure that I, or my phone, knows which version is currently installed.
ADDENDUM:
I decided to try one more thing of my own. I wiped data and re-flashed the Pie version of OxygenOS then rebooted.
:laugh: It booted and seemed to be working properly i.e. I could use wifi and the time doesn't keep being lost.
I have now installed Blu Spark TWRP and restored my 'data' backup and I am now back to where I was before all this started. It isn't really where I want to be because I have no Xposed but it is significantly better than a non-booting phone. I'll just have to wait for a new version of Xposed (if such ever appears).
I really don't know why those other suggestions didn't work.
Very many thanks to all those who offered support; it certainly does give a morale boost.
Click to expand...
Click to collapse
Your welcome good luck

Update OOS 9.5.7 to 9.5.8 - Magisk Root

Hi fellas,
I'm running OOS 9.5.7 GM21AA and rooted using Magisk.
I got a notification for the 9.5.8 system update. I would like to upgrade the OS but would still like to keep root (and don't wanna restore my phone). However, I have still backed up to Google Drive, and also using the OnePlus Switch app and copied the back up to my PC.
My question is, what's the best way to go about updating the system without having it touch my data?
I know the system update will unroot the phone automatically, which I'm guessing is going to delete all my data (because my device is rooted). So is there a way I can UNROOT separately so I don't lose my files and data, --> and then after that do the system update?
Can I download 9.5.8 from the web manually and install via TWRP for example, thus not messing with root and not losing data?
Thanks for your help in advance!

Follow this https://forum.xda-developers.com/oneplus-7-pro/how-to/successfully-upgraded-to-9-5-7-t3937414

whatthekj said:
Follow this https://forum.xda-developers.com/oneplus-7-pro/how-to/successfully-upgraded-to-9-5-7-t3937414
Click to expand...
Click to collapse
Thanks for the quick reply.
Just to make sure, following those steps I shouldn't lose my data, correct?

omar0aziz said:
Thanks for the quick reply.
Just to make sure, following those steps I shouldn't lose my data, correct?
Click to expand...
Click to collapse
Correct. I didn't lose data when I did it awhile ago but I would still make a Google back up just in case of any errors

whatthekj said:
Correct. I didn't lose data when I did it awhile ago but I would still make a Google back up just in case of any errors
Click to expand...
Click to collapse
Awesome, thanks again! :good:

See here, as the exact question has already been asked and answered: https://forum.xda-developers.com/oneplus-7-pro/help/how-properly-update-t3942735
I know you did already got an answer, but there is additional info on the other thread.
In particular, I would reiterate would I posted about data retention when updating:
Yes, it should retain your data. I just updated to 9.5.8 a few days ago, and it kept my data intact (by the process of updating in settings, don't reboot, in Magisk Manager install TWRP installer in inactive slot, etc.).
But what I always say when attempting a "dirty flash" (flashing the ROM, but retaining data) is: hope for the best, prepare for the worst. Backup anything that is important to you before any big update, just in case. What should happen, and what actually happens, are not always the same thing!

@omar0aziz, no, losing root does NOT mean you lose your data. (This is not to be confused with locking or unblocking the bootloader, which will inevitably lose your data.) If you lose root, simply flash Magisk again.
The best way to update? I recommend taking full manual control of the update process. Use TWRP to update your ROM (that includes stock OOS) when you want to, and when you need to fix stuff.
- Flash ROM
If you are on slot A and flash a ROM, it goes to slot B.
- Flash TWRP installer zip
Keeps TWRP on both slots, patches boot.img
- Reboot to TWRP, not system
- Flash ROM again
This installs the ROM to the other slot, so now both slots are updated
- Flash TWRP installer zip again
Keeps TWRP on both slots, patches boot.img
- Flash Magisk
Patches the TWRP-patched ROM, allowing it to boot.
- Wipe dalvik
You can wipe data and dalvik instead for a clean flash
- Now reboot to system
(Keep in mind that in most custom ROMs, you will need to do an initial setup of the ROM, then reboot to recovery and flash Magisk again to get root.)
Consider flashing BOTH slots (A and B) whenever you update OOS, for two reasons. First, you don't have to keep track of which slot has which version of OOS should you flash a custom ROM or kernel with a specific version of OOS required as a base. The second reason is more compelling: the way the data partition changes encryption every update has nearly obviated the reason for A/B slots, in that if newly updated B changes data encryption upon boot and then something happens, you cannot revert to A because A can't read the new data encryption. So the solution is to update both A and B at the same time so both slots use the same encryption and can both access the data partition.
Or like me, run the device decrypted (i. e. without forced encryption).
Good luck!

Has anyone successfully restored with TWRP?

I've been using Beta 19 OOS with all of my apps configured for quite a while now. But, I'd like to try some custom roms. If I don't end up caring for the custom roms, I'd like to easily restore back to OOS Beta with all of my apps. I've never tried a full restore with TWRP. Does it work successfully? Are there any "gotchas" that I should know about?

Yeah, I did it over the weekend.
Tried crdroid and lineage Android 11. Ran into some issues and was fed up.
I don't think you can fully restore photos and music and so on on your internal storage, so I backed up mine.
My steps were:
In twrp, format device,
Reboot to bootloader and reflash twrp using adb.
Reboot to twrp and copy over twrp installer, oos beta19 and Magisk.
Flash Oos beta 19,
Flash twrp installer,
Flash Magisk,
Reboot to twrp
Flash Magisk,
Reboot to system.
Your device will then be on stock oos 19 and start the setup process. You don't have to complete it, so just skip all the steps. When you can, restart to twrp and use the restore functionality.
Everything should then be as it was when you made the backup, except for the music and videos I think.

Pierre413 said:
Yeah, I did it over the weekend.
Tried crdroid and lineage Android 11. Ran into some issues and was fed up.
I don't think you can fully restore photos and music and so on on your internal storage, so I backed up mine.
My steps were:
In twrp, format device,
Reboot to bootloader and reflash twrp using adb.
Reboot to twrp and copy over twrp installer, oos beta19 and Magisk.
Flash Oos beta 19,
Flash twrp installer,
Flash Magisk,
Reboot to twrp
Flash Magisk,
Reboot to system.
Your device will then be on stock oos 19 and start the setup process. You don't have to complete it, so just skip all the steps. When you can, restart to twrp and use the restore functionality.
Everything should then be as it was when you made the backup, except for the music and videos I think.
Click to expand...
Click to collapse
Thanks! What issues did you have with the custom roms?

ledvedder said:
Thanks! What issues did you have with the custom roms?
Click to expand...
Click to collapse
I couldn't get lineage 18.1 working with Magisk and Twrp.
Crdroid I could use for a while, but when I tried to update it, my phone would only boot to Twrp.

Pierre413 said:
I couldn't get lineage 18.1 working with Magisk and Twrp.
Crdroid I could use for a while, but when I tried to update it, my phone would only boot to Twrp.
Click to expand...
Click to collapse
Which method did you use for updating crdroid? OTA or flashing from TWRP?

ledvedder said:
Which method did you use for updating crdroid? OTA or flashing from TWRP?
Click to expand...
Click to collapse
Ota.
When I rebooted I was dropped into lineages' recovery mode! Wtf

When you first went from OOS to custom rom, where you able to restore your apps and settings from TWRP, or did you have to start fresh?

I started fresh.
I think you can backup app settings with titanium backup, and just restore it on the new rom.

Pierre413 said:
I started fresh.
I think you can backup app settings with titanium backup, and just restore it on the new rom.
Click to expand...
Click to collapse
Yeah, that's my biggest concern. I don't want to have to reinstall and reconfigure all of my apps.

ledvedder said:
Yeah, that's my biggest concern. I don't want to have to reinstall and reconfigure all of my apps.
Click to expand...
Click to collapse
Try it and see how it goes. Make a Twrp backup and a titanium backup. Copy those files to a pc or something.
If you install a rom and you see the titanium backup isn't restoring all your apps, go back to OOS and restore using Twrp. You'll have your phone in the same state as when you started, only now with the benefit of experience.