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Flashing 6039Y to MM advice

Hi All,
I have an o2 UK 6039Y on Lollipop and want to upgrade to MM. OTA won't work with this version. So far I managed to root, install TWRP and recover fastboot commands (they were missing). I have not seen any official MM roms on the forum, there are some like:
https://forum.xda-developers.com/idol-3/development/rom-android-6-0-1-marshmallow-t3397546
https://forum.xda-developers.com/idol-3/general/rom-6-0-1-version-010-01-kernel-3-10-49-t3518041
Can someone explain to me please if I'm going to lose root, TWRP and fastboot by using the above? I assume you do with the first link and then it is hard to get these back, but I would not with the second link? I am after as stock experience as possible, using the phone for work and I need stuff to just work. Also if anything goes wrong or I can't use any apps I will need, will I be able to restore the backups of Lollipop I have taken with TWRP to roll back to Lollipop?
Many thanks in advance, if this has been covered somewhere please send me links, I've been reading the forum for about 24 hours and getting dizzy now
Ps Does anyone know how to get rid of the ugly o2 splash screen on boot?

Hi!
If you use the second link ( https://forum.xda-developers.com/idol-3/general/rom-6-0-1-version-010-01-kernel-3-10-49-t3518041 ):
*need twrp 3.0.0-0 or above to flash it
* fastboot - ok
* Loose root but can be rooted thrue TWRP
*It have TWRP
.

Thanks for confirming, I'll give it a go later on today. Btw if I need to restore the old system, do I need to restore the system image partition or only system and data? not sure which partitions are being overwritten when flashing a different os version...

nyx007 said:
Thanks for confirming, I'll give it a go later on today. Btw if I need to restore the old system, do I need to restore the system image partition or only system and data? not sure which partitions are being overwritten when flashing a different os version...
Click to expand...
Click to collapse
Backup those two in Recovery. If you want your data back, Backup /data. If not just backup /system. You might have to factory reset the phone though. Again, might.

ended up using Person78 script to do the full backup. Flashed his Rom, all working well.
Thanks folks

All EMUI backups are unbootable when restored to

Throughout my phone's lifetime, I've made a lot of backups, most of which have ended up saved on my hard drive. I recently wanted to go back to stock from a custom rom, so I copied one of the emui backups over and restored to it. Everything seemed to go smoothly, no error messages, but attempting to boot only got stuck on the blue honor boot animation. Tried several other backups, some rooted and heavily customized, some fresh unmodded installs, but all of them did the same thing. Meanwhile, all my custom rom backups work just fine. What gives?

I tried it too and it doesn't work. I think its because to install a custom ROM we format the data using twrp which also removes the encryption of some sorts, when we restore the backup that encryption is lost so it stays stuck at the blue Honor logo. That's my two sense on this. I don't know the real details.

asaditya379 said:
I tried it too and it doesn't work. I think its because to install a custom ROM we format the data using twrp which also removes the encryption of some sorts, when we restore the backup that encryption is lost so it stays stuck at the blue Honor logo. That's my two sense on this. I don't know the real details.
Click to expand...
Click to collapse
That does make more sense than anything I've thought of so far. So to restore from one of these backups, would I just have to reinstall emui from scratch first to get that encryption back? Is there another way to restore them without first having emui? Or are they just useless now?

Gannondalf said:
That does make more sense than anything I've thought of so far. So to restore from one of these backups, would I just have to reinstall emui from scratch first to get that encryption back? Is there another way to restore them without first having emui? Or are they just useless now?
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Click to collapse
I haven't been able to find a solution to this. What I do is use firmware finder to download the firmware+region zip and then install them together in any order via twrp. By this process you lose the data and twrp too as it is replaces by stock recovery. Before booting you must try to get into the stock recover and hit factory reset. You'll get EMUI back but no matter what you do you won't get your data back. Twrp backup is helpless I think because I've tried all sorts of things to get my data back.

asaditya379 said:
I haven't been able to find a solution to this. What I do is use firmware finder to download the firmware+region zip and then install them together in any order via twrp. By this process you lose the data and twrp too as it is replaces by stock recovery. Before booting you must try to get into the stock recover and hit factory reset. You'll get EMUI back but no matter what you do you won't get your data back. Twrp backup is helpless I think because I've tried all sorts of things to get my data back.
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Click to collapse
I've tried flashing emui firmware through twrp before and the region zip always works, but I've never gotten it to load the update.zip (using adb sideload for everything). But I'll try a few different things and see if I can get that to work. Getting back to emui is my primary focus since most of my data is backed up somewhere else, but if I find a way to successfully restore data from backups I'll let you know.

Gannondalf said:
I've tried flashing emui firmware through twrp before and the region zip always works, but I've never gotten it to load the update.zip (using adb sideload for everything). But I'll try a few different things and see if I can get that to work. Getting back to emui is my primary focus since most of my data is backed up somewhere else, but if I find a way to successfully restore data from backups I'll let you know.
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Click to collapse
What I'm telling is probably the easiest way let me break it down for you again.
1. Download firmware+region zip file from firmware finder.
2. Go to twrp, clear everything (format data).
3. Install the two downloaded zip I usually flash firmware and then the region zip.
4. After installation is over don't reboot go back to twrp home screen and reboot to recovery, which will be stock.
5. Format data using stock recover and then clear cache.
6. Restart and everything should work.
And if you find a way to get the twrp backups do post here.

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?
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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

Can I backup & restore including appdata with TWRP?

In the past I've always backed up my complete ROM incl. appdata with twrp. I didn't have to competely setup my device if flashing went wrong and reverted to stock. I had some bad luck flashing roms because the A/B slots are new to me. I now have my bootloader unlocked and everything setup on stock OOS, and made a twrp backup of super, recovery and data.
Before flashing another ROM I just want to make sure I can revert easily to the previous OS without doing a complete setup of app settings and stuff
My question is
Can I wipe/factory reset and then just restore with twrp?
Do I restore when in the active slot where current os is?
Are there any issues with password/encryption when restoring?
Expected scenario;
I'm on stock OOS, wiped and want to restore appdata, settings, homescreen, etc...
I failed to install custom ROM and want to revert to stock OOS without having to redo the entire setup
I did search google and this forum for an answer or guide but couldn't find one (please correct me if I missed a thread)

yusisushi said:
In the past I've always backed up my complete ROM incl. appdata with twrp. I didn't have to competely setup my device if flashing went wrong and reverted to stock. I had some bad luck flashing roms because the A/B slots are new to me. I now have my bootloader unlocked and everything setup on stock OOS, and made a twrp backup of super, recovery and data.
Before flashing another ROM I just want to make sure I can revert easily to the previous OS without doing a complete setup of app settings and stuff
My question is
Can I wipe/factory reset and then just restore with twrp?
Do I restore when in the active slot where current os is?
Are there any issues with password/encryption when restoring?
Expected scenario;
I'm on stock OOS, wiped and want to restore appdata, settings, homescreen, etc...
I failed to install custom ROM and want to revert to stock OOS without having to redo the entire setup
I did search google and this forum for an answer or guide but couldn't find one (please correct me if I missed a thread)
Click to expand...
Click to collapse
Did you read the first 3 posts of https://forum.xda-developers.com/t/...recovery-project-8t-kebab-2022-03-09.4302449/ ?

BillGoss said:
Did you read the first 3 posts of https://forum.xda-developers.com/t/...recovery-project-8t-kebab-2022-03-09.4302449/ ?
Click to expand...
Click to collapse
HI, yes I did
I am still confused because it says before a restore I have to disable screenlock, if my phone is softbricked or has no OS does that count as not having fingerprint/lockscreen enabled?

yusisushi said:
HI, yes I did
I am still confused because it says before a restore I have to disable screenlock, if my phone is softbricked or has no OS does that count as not having fingerprint/lockscreen enabled?
Click to expand...
Click to collapse
When you start TWRP, does it prompt you for a password/pin/pattern?
If Yes, then you have a lock screen password set. And if you can't get into the system to disable it, you'll have to format data (completely wipes all data).
If No, then you're good to go.

BillGoss said:
When you start TWRP, does it prompt you for a password/pin/pattern?
If Yes, then you have a lock screen password set. And if you can't get into the system to disable it, you'll have to format data (completely wipes all data).
If No, then you're good to go.
Click to expand...
Click to collapse
Hi, first of all; thank you for taking time to help me!
I managed to completely wipe the phone including data, and afterwards I restored it by copying the backup (which was now on my computer) and restoring it. SUCCESS! All appdata seems to be there, homescreen, and after second reboot my fingerprint still worked as before.
I just have one more question if you don't mind;
Below partitions I backed up;
Data
Boot
DTBO
Super
However, I'm not able to copy over the "super" partition from my computer to my phone, is this normal? it's almost 8GB and I was convinced I wasn't going to get to the OS without restoring it but apparently I didn't need it (?)
I suppose with the Fastboot Enhance Tool I'll be able to also restore this?

You really only need to backup the "system" partitions (boot, dtbo, super) if you're changing to custom ROMs. If you're always on OOS then you can forget about backing them up.
You should be able to copy the full backup, including super files from your PC to your phone using ADB. I've done that lots of times.
I've never used the tool you referred to. But I do know that you can't use fastboot to flash the super partition - it's too big.
However, if you break it up into chunks (I did it in 512MB chunks) using SparseConverter (https://forum.xda-developers.com/t/tool-sparseconverter-v1-0-1.2749797/) then you can successfully flash it.

Just to confirm, if a ROM bootloops and I don't have access to a computer, there's no way to restore the TWRP backup? Seems like this defeats the point of even making on-device backups (AFAIK encryption can't be disabled for many roms)

tech.central said:
Just to confirm, if a ROM bootloops and I don't have access to a computer, there's no way to restore the TWRP backup? Seems like this defeats the point of even making on-device backups (AFAIK encryption can't be disabled for many roms)
Click to expand...
Click to collapse
If you can enter TWRP (even if your rom bootloops) there is a great chance you can restore backup in TWRP.