Flash both A/B slots on stock recovery - OnePlus 6 Questions & Answers

Sorry if the question sounds weird, it's probably because I don't fully understand this. I know that the OnePlus 6 has two software slots, an A slot and a B slot, and I also have a vague idea about what those slots are doing during an update.
Looking around, I found a thread that recommends flashing software on both slots, saying that it could fix some issues. I'm currently on Oreo, and I'm planning to get back to 9.0.4., but I remember that during 9.0.2. I think, when I was upgrading from Oreo again, I locally installed the same update file twice. I installed it once, everything went well, I went back to the local upgrade menu after the restart, and installed it again. And the phone seemed to be faster for some reason, that's what I'm trying to achieve again.
The thread that I found mentioned how to flash the software on both slots while on TWRP, would locally installing it twice achieve the same effect? Or is there something else that I can do?
Thank you very much in advance

TheMadKing said:
Sorry if the question sounds weird, it's probably because I don't fully understand this. I know that the OnePlus 6 has two software slots, an A slot and a B slot, and I also have a vague idea about what those slots are doing during an update.
Looking around, I found a thread that recommends flashing software on both slots, saying that it could fix some issues. I'm currently on Oreo, and I'm planning to get back to 9.0.4., but I remember that during 9.0.2. I think, when I was upgrading from Oreo again, I locally installed the same update file twice. I installed it once, everything went well, I went back to the local upgrade menu after the restart, and installed it again. And the phone seemed to be faster for some reason, that's what I'm trying to achieve again.
The thread that I found mentioned how to flash the software on both slots while on TWRP, would locally installing it twice achieve the same effect? Or is there something else that I can do?
Thank you very much in advance
Click to expand...
Click to collapse
Yupp. Same effect ??

whizeguy said:
Yupp. Same effect ??
Click to expand...
Click to collapse
Thank you!

Related

I'm stuck

Hi guys,
for some reason after I did update to KangVIP I can't get rid off it. Besides I got no wifi and bt and I was going to start over with b023 as suggested but at this point I wont bother anymore.
I did wipe the system, I did advanced wipe using twrp but no matter what I do none of the stock firmwares are going through however the Kanga one always goes through.(KangaVIP goes through only in TWRP)
twrp 2.8.7.0
wipe
advanced wipe
I select all the partitions
mkdosfs process ended with error=1
unable to wipe /usb
unknown mtp message type: 1
unable to wipe /usb
I go back, restart to fastboot, (device is saying there is no OS installed), I restore the recovery, create dload folder on my sdcard, put there 028 (actually I tried all of them already), volume+ volume - power and I get error.
What am I missing ?
Anyone can help ?
Thanks in advance.
Eric
First you did a OTA from B029 to B209?
If so you are now on a Android 6 ROM you cant go back to Android 5 without a Rollback from Huawei.
Hirs_E_Fruit said:
First you did a OTA from B029 to B209?
If so you are now on a Android 6 ROM you cant go back to Android 5 without a Rollback from Huawei.
Click to expand...
Click to collapse
Yes I did then I wiped everything and started with b028 again.
Same thing, wifi didn't work same with BT.
Wipe again and this time I did local update and since the local update I can't go back not even b029.
77Eric77 said:
Yes I did then I wiped everything and started with b028 again.
Same thing, wifi didn't work same with BT.
Wipe again and this time I did local update and since the local update I can't go back not even b029.
Click to expand...
Click to collapse
Right now you are on a Android 5 or Android 6 ROM?
If you on a Android 5 ROM you can force update a Complete ROM to install a clean system and try if everything works.
Hirs_E_Fruit said:
Right now you are on a Android 5 or Android 6 ROM?
If you on a Android 5 ROM you can force update a Complete ROM to install a clean system and try if everything works.
Click to expand...
Click to collapse
I'm stuck on 6.0
I know I can do force update on 5.0 I said it above I just can't do it with 6.0 -> b029, only with your rom.
Anyone else is having this issue ?
The Kanga rom got a quite few problems no wifi and not BT, Google play services crashing (this can be fixed with gapps) my co worker just tried it with his own methods and same issue. After I went through the whole Kanga thread 60% of the posters got problems most of them are ignored.
I don't have any problems but I think the people with problems are people who have a DAV 701L.
Hirs_E_Fruit said:
Right now you are on a Android 5 or Android 6 ROM?
If you on a Android 5 ROM you can force update a Complete ROM to install a clean system and try if everything works.
Click to expand...
Click to collapse
Hirs_E_Fruit said:
I don't have any problems but I think the people with problems are people who have a DAV 701L.
Click to expand...
Click to collapse
I got DAV-703L, just simple question, why is the wifi and bt not working ?
When I get into Kanga I can remove the root or deny access to it is there a way to ditch it ?
Yeah I know it's working for you and it's not working for 10 other people including 703L owners. There is something wrong with the rom no doubt about it.
77Eric77 said:
I got DAV-703L, just simple question, why is the wifi and bt not working ?
When I get into Kanga I can remove the root or deny access to it is there a way to ditch it ?
Yeah I know it's working for you and it's not working for 10 other people including 703L owners. There is something wrong with the rom no doubt about it.
Click to expand...
Click to collapse
I think there was an error while flashing and without a full clean Rom flash i can't see a solution.
Before I got it to work I flashed it more than 3 times and everytime everything worked so I think don't think the ROM is that bugged.
Hirs_E_Fruit said:
I think there was an error while flashing and without a full clean Rom flash i can't see a solution.
Before I got it to work I flashed it more than 3 times and everytime everything worked so I think don't think the ROM is that bugged.
Click to expand...
Click to collapse
The first rom you introduced is working "fine" I get the wifi and bt no problem but once I switch into the latest build it's gone.
Any idea where can I get full clean Rom ?
This one is a no go http://www.needrom.com/download/p8max-dav-703l/
I managed to rollback to 5.1.1 but when I try to force flash it, it says it's not compatible.
If you don't update properly to B209, when you flash any B209 rom you are going to run into issues such as the wireless Bluetooth and sim card switching for some. If you properly updated the dload method should have completed successfully. Look at the kernel and radio version of B209 in About phone and compare it to others and see if they match.
ajsmsg78 said:
If you don't update properly to B209, when you flash any B209 rom you are going to run into issues such as the wireless Bluetooth and sim card switching for some. If you properly updated the dload method should have completed successfully. Look at the kernel and radio version of B209 in About phone and compare it to others and see if they match.
Click to expand...
Click to collapse
I don't want to use your rom even if you removed the Chinese it's still inside the system. Boot load times take much longer. Unexpected crashes. I did try it on 4 phones with OTA and local updates 2 are working but the Kang does crash twice a day minimum.
All what I'm asking is how to restore it to it's original settings, this was my worst mistake ever.
What I'm trying to say if I do something I do it properly just look at your thread 85% failure ratio that doesn't look like it was done properly does it ?
77Eric77 said:
I don't want to use your rom even if you removed the Chinese it's still inside the system. Boot load times take much longer. Unexpected crashes. I did try it on 4 phones with OTA and local updates 2 are working but the Kang does crash twice a day minimum.
All what I'm asking is how to restore it to it's original settings, this was my worst mistake ever.
What I'm trying to say if I do something I do it properly just look at your thread 85% failure ratio that doesn't look like it was done properly does it ?
Click to expand...
Click to collapse
Really dude?? No worries, it will be the last time I do anything for the P8Max. Maybe you should just sell the phone since you're having all sorts of issues with it....or maybe you should have left it totally stock then. Or maybe read through the Mediapad X2 forums because the two phones are very similar.

Has Anyone Gotten a Custom ROM onto a BLN-L24 (US Variant)?

I have tried quite a few ROMs, and all ended up going back to stock firmware because they wouldn't boot. I know I have to format data, and some ROMs ask you to change the data partition as f2fs.
Still, I think that there may be no ROMs that currently work for the US variant. One guy said LOS 13 worked, but when I flashed it, it failed. If someone has gotten it to work, can you please post as many steps as you remember on how to get it work?
Debrand to BLN-L21 following this guide and you're ready to flash cooked ROMs https://forum.xda-developers.com/honor-6x/how-to/guide-successful-debranding-to-bln-t3701050
RedSkull23 said:
Debrand to BLN-L21 following this guide and you're ready to flash cooked ROMs https://forum.xda-developers.com/honor-6x/how-to/guide-successful-debranding-to-bln-t3701050
Click to expand...
Click to collapse
Thanks, but wouldn't there be more issues down the line with a debranded phone? What if I soft-bricked my phone, it seems like it'd be really hard to restore? Has anyone actually ever done this on a BLN-L24?
Hello all,
I too am having issues with flashing roms to this device, US variant (BLN-L24). In my particular case, the rom boots up (EliteRom v7.1) and will actually function. However, wifi does not work, as well as I have no sound whatsoever. Youtube also will not play, nor will any videos, which I'm guessing is tied to whatever issue is with the sound. I have flashed multiple times per the step by step instructions, as well as following the Youtube video, all with the same result over the last few days. At this point, my phone is effectively useless to me, though cellular data does still work, just no calls can be answered. Anyone have any suggestions I might be able to follow? Also, even my TWRP backup that I made before installing the rom will not restore at this point. Any help is appreciated, thanks.
Jessooca said:
You must be missing a step or something, because [Elite ROM][EMUI 5.1] Elite ROM v7.1 for Honor 6X by HassanMirza01 works on the L24 us variant without issues, I have none.
Perhaps go back to stock and start over. I haven't had any issues with his rom and I didn't do anything more than what's needed to root/install twrp and flash the rom per his instructions.
Click to expand...
Click to collapse
I just followed the instructions; I believe to the best I could, and I'm stuck in a bootloop now. Which version of EMUI were you on before flashing? I was on EMUI 5.0 which may be my issue.
I started from EMUI 5.0
Unlocked my bootloader
Let it factory reset
Installed the Elite TWRP on the page
Booted to Elite TWRP
Formatted all partitions excpet for external sd card
Reformatted Data to f2fs
Re-wiped data
Checked that it was f2fs
Installed Elite ROM zip
Installed open gapps 7.0 ARM64
Installed the patch
Rebooted
Bootloop
i4ybrid said:
I just followed the instructions; I believe to the best I could, and I'm stuck in a bootloop now. Which version of EMUI were you on before flashing? I was on EMUI 5.0 which may be my issue.
I started from EMUI 5.0
Unlocked my bootloader
Let it factory reset
Installed the Elite TWRP on the page
Booted to Elite TWRP
Formatted all partitions excpet for external sd card
Reformatted Data to f2fs
Re-wiped data
Checked that it was f2fs
Installed Elite ROM zip
Installed open gapps 7.0 ARM64
Installed the patch
Rebooted
Bootloop
Click to expand...
Click to collapse
On one of the attempts that I did for installing, I installed the patch and it put me in a boot loop. Maybe not installing the patch can help you?
I cant get anything to work for the US version. Sure stuff boots but some of it is just broken. On octOS i am unable to use root unless i switch supersu to automatically grant root to apps. I cant get root access by using prompt because nothing pops up. On crdroid i have the same exact issue. Id rather have the prompt than allow any app root access without my knowledge. With ELITE ROM my first boot brings up a home screen with no keyboard. It completely skips any kind of setup screen. I can get the setup screen by flashing a keyboard from an aroma gapps installer but then i lose google services. The US version also seems to be forgotten as for most roms you wont see it anywhere under supported lists.
I've never been able to get a custom rom to work on my BLN-L24. Everything just ends in a never-ending bootloop of frustration.
Though, I have only ever tried with EMUI 5.0+. Maybe an earlier version of EMUI gets better results...?
code_name_duchess said:
I've never been able to get a custom rom to work on my BLN-L24. Everything just ends in a never-ending bootloop of frustration.
Though, I have only ever tried with EMUI 5.0+. Maybe an earlier version of EMUI gets better results...?
Click to expand...
Click to collapse
It really sucks that nothing seems to work. Ive tried flashing using multiple recoveries and ive tried all kinds of flashing to fix issues with the ROMS. Nothing helps. If anyone has successfully gotten a ROM fully working on BLN-L24 they need to tell people exactly what they did step by step.
It seems that for the roms located here, they seem to all assume that the phone has been debranded to bln-l21 variant. I don't know if it has any bearing on the current issues we're all experiencing, but I did notice that all twrps available for this device on the forums state they are the "Open Kirin Edition". It's been a while since I've rooted or rom'd a phone besides this one, but I've never encountered a twrp with a custom name like that.
I know that the developer of the EliteRom had his custom twrp, but is there a different twrp besides that one that does not state it is an "Open Kirin Edition"? Like I said, not sure if it has any bearing on things here, but I've been very confused about that.
TurtlePwr82 said:
It seems that for the roms located here, they seem to all assume that the phone has been debranded to bln-l21 variant. I don't know if it has any bearing on the current issues we're all experiencing, but I did notice that all twrps available for this device on the forums state they are the "Open Kirin Edition". It's been a while since I've rooted or rom'd a phone besides this one, but I've never encountered a twrp with a custom name like that.
I know that the developer of the EliteRom had his custom twrp, but is there a different twrp besides that one that does not state it is an "Open Kirin Edition"? Like I said, not sure if it has any bearing on things here, but I've been very confused about that.
Click to expand...
Click to collapse
For most phone i've ever owned you never had to change the recovery for each ROM. Its confusing. Most recoverys say Open Kirin Edition when booting. What confuses me is why we need to debrand to get the ROMS to work. If the phone pretty much run on the same hardware then why is L24 having so many issues? Why are the devs not testing on these devices?
BakedOnSomeSour said:
For most phone i've ever owned you never had to change the recovery for each ROM. Its confusing
Click to expand...
Click to collapse
Right, that's what I was thinking. For any phone I've ever rom'd, there was always just one twrp that everyone worked from.
Edit: found this while looking through the roll back to stock forum. I don't know if it will help anyone else, but figured I'd put it here as well if it might. All credit for this goes to the original poster johnnyrichter:
johnnyrichter said:
Tried this method after being on LineageOS for a week or two and having poor LTE signal, no MMS, and voicemail issues so I'm trying to go back to stock so I can have a fully functional phone since I rely on it heavily for work. Followed all steps using BLN-L24 B360 firmware. On step 10 I rebooted to update and it went right to "5% Installing Update" and stuck there for 5 mins, then rebooted itself, has been sitting at "honor" boot screen for 14 minutes so I made it reboot to EMUI recovery, wiped/factory reset, rebooted, loaded EMUI afte 2 more minutes. Appears to have worked and hopefully my issues are fixed!
Edit: Signal, mms, and voicemail issues fixed.
Click to expand...
Click to collapse
Hopefully will benefit someone here as well.
When debranding the BLN-L24, and branding it to BLN-L21, are there any issues with the ROMs once they're installed? I imagine the radios, and such are different for the two models??
BakedOnSomeSour said:
Why are the devs not testing on these devices?
Click to expand...
Click to collapse
Devs can only test devices they have in possession. If they don't have your phone model, how are they going to test it?
galapagos said:
Devs can only test devices they have in possession. If they don't have your phone model, how are they going to test it?
Click to expand...
Click to collapse
well, many don't want to give them a phone because most developers here tend to stop work on a ROM and leave people hanging.
I have gotten several ROMs working on L24 variant...
Yes it seems to me any Elite kernel based ROM works or should work on the L24. But /data must be ext4 format. Then even that the ROM works, the fingerprint scanner never allows a complete successful scan. I think because it must be f2fs format for that encryption to work or something. This is the link to those ROMS https://hassanmirza01.blogspot.com/p/custom-roms.html?m=1
On the other hand the LOS based ROMs never work or at least they reboot and the screen is always black or the ROM branding just stays there flashing. This sucks cause I want to run the newest Resurrection ROM but I ask the developer about why I have that problem or how long that ROM takes to boot and I never get an answer. He also just put a new beta AOKP ROM up and it does the same black screen thing too.
I am also suspicious it has to do with the version of TWRP. I think some are capable of formatting f2fs correctly or the encryption or whatever. Point is some of the devs need to be a little more consistent answering questions at a minimum. I know it takes time to fix bugs but give us a little heads up.

Bootloop after installing Xposed on Oreo, Bit of help would be appreciated.

After searching around and not being 100% sure on how I should go about fixing this particular bootloop I decided to post a thread. Bootloader unlocked, phone unlocked, FRP unlocked, and TWRP installed. Can't seem to get the phone recognized when plugged in no matter where I'm at and hisuite recovery doesn't work, nor does the erecovery or whatever it's called. I had the phone running just fine with supersu but after installing my usual Xposed/Busybox and rebooting I got caught in a bootloop. (might have been caused by being on Oreo and having some problems with a version made for Nougat or something). I've seen there are various ways to exit the loop and at this point I'd be open to any but I do notice some posts saying they almost bricked their phone while doing so. Currently on my microSD I've got a hwota update I was going to try to use. I've got no backups in TWRP either because I'm irresponsible (my fault). What can I do to just wipe the phone, reinstall any version of android and get back to where I was at. I'm a little new to this as I've only ever rooted my tablet. Thanks for the help and all the info I've taken from this forum before and hopefully now. Forgot to mention I don't know my full device number only MHA-L29 in the US.
Ok Well after laying in bed and thinking about it I wound up running HWOTA8 from TWRP since I could access that. Seemed to just bring me back to eRecovery, and I factory reset my phone. I'll reinstall TWRP and flash supersu then make a backup and try again. Not sure what happened but I seemed to be in a pretty good spot since I could access TWRP even though my phone wouldn't show up on my computer while in fastboot/Recovery mode.
edit: oh I got a new problem now. I'm on testkeys firmware, camera, sim, and bluetooth work but I can't update from 7 back to 8. I'll do more testing around before bothering to unlock bootloader or install TWRP.
I've been trying to follow the guide in this thread but to no avail. I just get software install failed and then I have to start again.
Well another day of searching google and XDA trying to figure out guides and I don't think I'm any closer to a solution to getting off test-keys. Some seem to suggest that you need to go back to MM, some suggest running HWOTA, some suggest the three button recovery and others say that won't work at all. I'm not sure I've ever felt this confused haha. I'll keep at it but there has to be some way to get to a build that has the updater on it since that's all I seem to be lacking to get off test-keys. I can even search the settings for the updater but when you press it nothing happens. It's like they completely removed any sort of updating this build can do.
KittyCat5eUTP said:
Well another day of searching google and XDA trying to figure out guides and I don't think I'm any closer to a solution to getting off test-keys. Some seem to suggest that you need to go back to MM, some suggest running HWOTA, some suggest the three button recovery and others say that won't work at all. I'm not sure I've ever felt this confused haha. I'll keep at it but there has to be some way to get to a build that has the updater on it since that's all I seem to be lacking to get off test-keys. I can even search the settings for the updater but when you press it nothing happens. It's like they completely removed any sort of updating this build can do.
Click to expand...
Click to collapse
What is your full build number? Please, post screenshot.
5[Strogino] said:
What is your full build number? Please, post screenshot.
Click to expand...
Click to collapse
Model: MHA-L29
Build: NRD90M test-keys
EMUI version: 5.0.1
Android version: 7.0
I believe I was originally on some variant of MHA-L29C567 since I'm US based and its the dual sim version
I've tried using HWOTA a few times to either upgrade/update or rebrand and no matter what I choose when my phone restarts to install I just get software install failed. Usually I'll have to run through first time setup again. I've read that some people said this particular issue had to do with the update zips but mine seem to be named correctly so all I can think of doing is getting another firmware and trying again with that.
haha okay so I found out I was putting the update zips in the wrong folder. I fixed that and re ran HWOTA. update started/finished and my phone started booting and restarting a lot then went into erecovery. I'm downloading the update package right now and it's slow as hell but it's moving. And that failed leaving me to boot a few times and then get back to erecovery. I'll try getting into fastboot or recovery.
Edit: Well that seems to have resolved itself now. After having the erecovery fail I wiped/factory reset and booted the phone into oreo 8.0.0.321 with all the apps and updater. Thanks to everyone who dropped in and I'll be getting emails if someone replies that needs help too. I'm not very knowledgeable but I can give it a shot.

How to downgrade HTC U11+ from Android Pie?

Already created thread in the wrong place https://forum.xda-developers.com/showthread.php?t=3952280
I have HTC U11+ TW version. Ever since I got the Pie update, my phone is freezing a lot. I need to force restart it 10+ times a day. I tried factory reset, clear cache, etc. Nothing works. I did not have any experience with flashing, but I have been reading a lot. I have my bootloader unlocked with S-ON.
My current build number is 2.15.709.1, since I wanted to downgrade, I tried flashing stock image HTC_U11+_TW_1.24.709.999_Images_OTA using fastboot (no TWRP). My phone went into a bootloop when I did that. I think this is because I can only flash an image with the same build number? Anyway, I flashed a HTC_U11+_TW_2.15.709.1_Images_OTA image and my phone is back to where it was, Android Pie (no bootloop), but still freezing a lot.
I found the HTC_DevInfo_Tool.zip tool on this thread https://forum.xda-developers.com/u11/how-to/guide-downgrade-htc-u11-oreo-to-nougat-t3754481, but I am not sure if it will work on my phone.
Can someone advise what should I do to downgrade? Also did anyone face a similar problem after the update?
I found someone tried what I wanted to do here
https://forum.xda-developers.com/htc-u11/help/error132-signature-error-downgrade-htc-t3948079
Looks like it wont work?

Question Flashing Androd 14

Might be a noob question but can i flash Android 14 DP2 to an inactive slot and switch back to Android 13 stable on a current slot later? Will any of these steps require a data wipe, will switching back and forth android version cause any harm to apps and settings? Using Pixel flash tool, heard about interesting stuff on A14 and want to check it out by myself.
Diofyz said:
Might be a noob question but can i flash Android 14 DP2 to an inactive slot and switch back to Android 13 stable on a current slot later? Will any of these steps require a data wipe, will switching back and forth android version cause any harm to apps and settings? Using Pixel flash tool, heard about interesting stuff on A14 and want to check it out by myself.
Click to expand...
Click to collapse
You CAN'T.
Definitely no...
Diofyz said:
Might be a noob question but can i flash Android 14 DP2 to an inactive slot and switch back to Android 13 stable on a current slot later? Will any of these steps require a data wipe, will switching back and forth android version cause any harm to apps and settings? Using Pixel flash tool, heard about interesting stuff on A14 and want to check it out by myself.
Click to expand...
Click to collapse
The quoted post below may answer the question better as to why you wouldn't be able to pull this off...
badabing2003 said:
Thanks @simplepinoi177 for finding relevant posts.
What I want to add is that, although the initial thought process was to use the alternate slot as a fallback.
Unfortunately that only works with older devices, and does not work for newer ones.
Even for older devices one needs to remove system_other.img from the update image to get it to work.
I have posted about the details, unfortunately I'm not very good at finding my own posts.
The gist of the matter is that, factory images contain system_other which is flashed to the alternate slot's system partition, they contain the optimized dex files which are copied to the active slot after booting to system to save time.
This effectively deems the alternate partition's system unusable.
Removing system_other before flashing theoretically would get around that issue, at a small performance hit at first while the dex files are optimized on first use, and that works on older devices.
I managed to setup Pixel XL with both slots bootable, and alternate between them at will, even one was rooted and the other stock.
Sadly this no longer works on newer devices due to AVB.
Click to expand...
Click to collapse
simplepinoi177 said:
The quoted post below may answer the question better as to why you wouldn't be able to pull this off...
Click to expand...
Click to collapse
And even if AVB did not prevent booting on both slots and the user took care of the system_other, it is highly likely that he would encounter random crashes or worse, mainly because of two different versions of OS using the same data partition, (remember there is only one data partition).
This is one of the reasons why a downgrade of OS version causes such issues.
Okay, i had thoughts that this would end bad, decided to ask just to make it clear. Thank you for your responses.

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