Database Users

Downgrade from dev preview back to 7.0

Newbie here. Apologies if this has been asked before, but I'm currently sitting on the 7.1.1 beta, rooted, with TWRP installed, and I'm wondering what the best way to downgrade back to 7.0 is. I understand that I won't keep my root, and will most likely have to wipe all my data, but that's not a problem for me, as everything is backed up and I can easily root again. Is the best way to just opt out of the beta, or will I need to manually flash back to 7.0?

I would flash back to stock seeing as how you are rooted/TWRP. You will also need to opt out of the beta program or you will continue to get notifications to update to 7.1.1

Updating to Offical Nougat

I have decided to try official nougat on my Moto G4 Plus. I am currently on custom Rom MM but when got the phone I installed TWRP and Super su and made a backup using twrp and full flashfire backup. If I install Nougat after going back to stock can I downgrade to MM when I want and maybe using the flashfire backup? Will I be able to relock the bootloader after going to nougat?

Once you go nougat, there's no going back as far as your bootloader is concerned. You can get back on MM via fast boot (there's a guide to do this in the guides section), but you don't want to flash a MM GPT or bootloader image after upgrading to nougat or you may hard brick it. I wouldn't risk flashing a MM flashfire backup after upgrading to nougat, personally. You'll want to do it manually with adb to make sure nothing gets funky. My advice would be to check out the several threads in the guides section to make sure you understand what you need to do to get back on marshmallow should you decide to revert.

How to Update to B19 or B25 from Rooted B29?

Hey guys, so I'm still pretty new at this whole android modding stuff (but I do have some background knowledge). I managed to unlock the bootloader, install TWRP, and root B29. However, now I wanna upgrade up to Nougat and eventually to the newest firmware available (either B19 or B25, not sure which one yet because I've heard quite a bit about B25's lack of fastboot). Anyways, I have no idea how to get there while still retaining my custom recovery and root. I tried using Flashfire, however, since MiFavor auto-installs after it finishes downloading the OTA, I can't stop it fast enough to launch Flashfire and install it through that. Could anyone point me in the right direction (or show me a guide) that would help me get to the newest firmware? Thanks!
P.S: This is slightly unrelated, but I was wondering, would I have to flash a custom bootloader+modem if I choose to flash a stock update through TWRP? I heard that if you choose to upgrade to a newer generation of android (i.e: Marshmallow to Nougat) through a custom recovery, that you'd have to flash an updated version of the bootloader+modem as well, but the thing is I'm planning on staying on MiFavor, so I'm not sure if it'd be necessary.

HunterBlade said:
Hey guys, so I'm still pretty new at this whole android modding stuff (but I do have some background knowledge). I managed to unlock the bootloader, install TWRP, and root B29. However, now I wanna upgrade up to Nougat and eventually to the newest firmware available (either B19 or B25, not sure which one yet because I've heard quite a bit about B25's lack of fastboot). Anyways, I have no idea how to get there while still retaining my custom recovery and root. I tried using Flashfire, however, since MiFavor auto-installs after it finishes downloading the OTA, I can't stop it fast enough to launch Flashfire and install it through that. Could anyone point me in the right direction (or show me a guide) that would help me get to the newest firmware? Thanks!
P.S: This is slightly unrelated, but I was wondering, would I have to flash a custom bootloader+modem if I choose to flash a stock update through TWRP? I heard that if you choose to upgrade to a newer generation of android (i.e: Marshmallow to Nougat) through a custom recovery, that you'd have to flash an updated version of the bootloader+modem as well, but the thing is I'm planning on staying on MiFavor, so I'm not sure if it'd be necessary.
Click to expand...
Click to collapse
https://forum.xda-developers.com/axon-7/development/rom-guide-updates-to-stock-files-via-t3469484

[OP5] Need help upgrading to oreo from rooted nougat

I am on OOS 4.5.13 "stock", i used the engineering mode exploit to get magisk root while my bootloader is still locked, now i want to upgrade to latest OOS oreo but i am afraid that this exploit might end up bricking the device. My bootloader is still locked and i have stock recovery (sorry if stating the obvious) and i have no problem losing my data to upgrade to oreo, but i would like to get magisk on oreo when i upgrade, any tips/precautions or a link to a guide would be very helpful. I don't need to root right away as i might like getting OTA updates but i don't wan't to wipe the device another time for some special procedure.
Should i unlock bootloader then upgrade or reverse the order? I keep getting these prompts to upgrade with a disclaimer that full system needs to be downloaded, should i just do it OTA?
PS: i have titanium backup working and can backup the apps i need.

yohouse2 said:
I am on OOS 4.5.13 "stock", i used the engineering mode exploit to get magisk root while my bootloader is still locked, now i want to upgrade to latest OOS oreo but i am afraid that this exploit might end up bricking the device. My bootloader is still locked and i have stock recovery (sorry if stating the obvious) and i have no problem losing my data to upgrade to oreo, but i would like to get magisk on oreo when i upgrade, any tips/precautions or a link to a guide would be very helpful. I don't need to root right away as i might like getting OTA updates but i don't wan't to wipe the device another time for some special procedure.
Should i unlock bootloader then upgrade or reverse the order? I keep getting these prompts to upgrade with a disclaimer that full system needs to be downloaded, should i just do it OTA?
PS: i have titanium backup working and can backup the apps i need.
Click to expand...
Click to collapse
if you are ok with loosing data then i suggest you to unlock the bootloader then flash the latest oos build from the official website ( that makes it easy for you to switch roms easily in the future )
if you need your data then just accept the ota ( obviously you will lose root access and magisk features )
but imo no harm can be done accepting the ota as oneplus itself know that most of users are rooted so they send you the ota as a full build that replace the firmware parts previously modified
the choice is yours
Sent from my OnePlus 5 using XDA Labs

[PLEASE HELP] HW P9 Lite (VNS-L21) Downgraded to MM, unable to get back to Nougat.

So, due to my Pixel's battery life being atrocious I wanted to try LineageOS 14.1 and use my P9 Lite as a daily driver.
I started by downgrading to Marshmallow from Nougat as DC-Unlocker wouldn't work on 7.0 and I needed the bootloader unlock code.
( I used the firmware and tutorial from 4mobiles dot net, looks to be a polish one. )
Once on 6.0 MM I was able to get the code and unlock the bootloader, however, LineageOS and it's TWRP does not seem to work on 6.0 so I needed to upgrade to Nougat again.
Unfortunately, when I try the official update it says there are no updates available and any time I try to use the firmware finder app either the download fails or upon attempting install the phone reports a 'compatibility issue' and won't accept any firmware.
I tried loads of different update.zip files via the recovery update as well as through ADB. Nothing seems to work.
Finally I was able to get TWRP 3.0.2.0 on it, but again, only the version from 4mobiles dot net works. Other versions of TWRP just remove recovery altogether. (I guess they don't work with 6.0)
At this point it's a bit easier to try roms, but still none of 'em seem to work.
-I tried sideloading and manually installing lineageos 14.1 from the sdcard, it fails with ERROR CODE 7
(currently I'm stuck on the 'YOUR PHONE CAN NOT BE TRUSTED/BOOTLOADER UNLOCKED' screen, no splash but I can get into recovery and fastboot)
-Tried flashing boot.img and system.img of various OEM firmwares as well as LineageOS's manually through ADB, same result, bootloops
It seems to me that some other file makes the phone believe that it's incompatible with any of my roms. Maybe the firmware i got for 6.0 is region locked, or perhaps it's the vendor.img that I don't know how to flash?
I know it's a grave mistake but I didn't take a note on what my original version number was. It was the latest 7.0 Nougat EMUI 5.0 update on a UK based unlocked VNS-L21. The 6.0 MM I flashed on it with a rollback update was C900B300.
I tried the proxy method, custom DNS, and manual download on various roms in the Firmware finder app. Even when the download doesn't fail, the system always says the firmware is incompatible when I try to install.
Right now I could put 6.0 MM back on it and make it usable, but I doubt it would be much better than the 7.0 that was on it originally.
Can anyone tell me how I could put the original Nougat firmware back on it? eRecovery doesn't detect any possible updates.
Any help would be appreciated and thanks in advance!

richplays said:
So, due to my Pixel's battery life being atrocious I wanted to try LineageOS 14.1 and use my P9 Lite as a daily driver.
I started by downgrading to Marshmallow from Nougat as DC-Unlocker wouldn't work on 7.0 and I needed the bootloader unlock code.
( I used the firmware and tutorial from 4mobiles dot net, looks to be a polish one. )
Once on 6.0 MM I was able to get the code and unlock the bootloader, however, LineageOS and it's TWRP does not seem to work on 6.0 so I needed to upgrade to Nougat again.
Unfortunately, when I try the official update it says there are no updates available and any time I try to use the firmware finder app either the download fails or upon attempting install the phone reports a 'compatibility issue' and won't accept any firmware.
I tried loads of different update.zip files via the recovery update as well as through ADB. Nothing seems to work.
Finally I was able to get TWRP 3.0.2.0 on it, but again, only the version from 4mobiles dot net works. Other versions of TWRP just remove recovery altogether. (I guess they don't work with 6.0)
At this point it's a bit easier to try roms, but still none of 'em seem to work.
-I tried sideloading and manually installing lineageos 14.1 from the sdcard, it fails with ERROR CODE 7
(currently I'm stuck on the 'YOUR PHONE CAN NOT BE TRUSTED/BOOTLOADER UNLOCKED' screen, no splash but I can get into recovery and fastboot)
-Tried flashing boot.img and system.img of various OEM firmwares as well as LineageOS's manually through ADB, same result, bootloops
It seems to me that some other file makes the phone believe that it's incompatible with any of my roms. Maybe the firmware i got for 6.0 is region locked, or perhaps it's the vendor.img that I don't know how to flash?
I know it's a grave mistake but I didn't take a note on what my original version number was. It was the latest 7.0 Nougat EMUI 5.0 update on a UK based unlocked VNS-L21. The 6.0 MM I flashed on it with a rollback update was C900B300.
I tried the proxy method, custom DNS, and manual download on various roms in the Firmware finder app. Even when the download doesn't fail, the system always says the firmware is incompatible when I try to install.
Right now I could put 6.0 MM back on it and make it usable, but I doubt it would be much better than the 7.0 that was on it originally.
Can anyone tell me how I could put the original Nougat firmware back on it? eRecovery doesn't detect any possible updates.
Any help would be appreciated and thanks in advance!
Click to expand...
Click to collapse
use full update.zip from firmware finder. to upgrade, you can't use latest package. you must use first nougat update.zip.

RyotaGamer said:
use full update.zip from firmware finder. to upgrade, you can't use latest package. you must use first nougat update.zip.
Click to expand...
Click to collapse
I've only used Full-OTAs, no bugfixes. None of them seem to work.
Yesterday I tried manually selecting a different model in Firmware Finder;
VNS-L21C185 instead of the default VNS-L21C432-
and downloaded VNS-L21C185B397 update. It verified fine but I couldn't install it due to my recovery being TWRP and not the stock one. What I think I'll try is flashing the recovery of the original Marshmallow firmware that's currently on the system and seeing if it will install this update. I kinda doubt it will tho.
Any other suggestions?

Is there any way I can install a nougat TWRP without my current working firmware being on nougat?
If not, is there any way I can install a nougat firmware with TWRP 3.0.2.0? In order to flash update.zip / update.app files I need to get the stock recovery back, but I can't seem to be able to do that.
Is there any way I can flash a standard OEM Rom onto it with TWRP?

richplays said:
Is there any way I can install a nougat TWRP without my current working firmware being on nougat?
If not, is there any way I can install a nougat firmware with TWRP 3.0.2.0? In order to flash update.zip / update.app files I need to get the stock recovery back, but I can't seem to be able to do that.
Is there any way I can flash a standard OEM Rom onto it with TWRP?
Click to expand...
Click to collapse
you can't install nougat TWRP in EMUI 4. you can install update.app with original recovery.
extract UPDATE.APP from update.zip
place UPDATE.APP to dload folder in sdcard.
press power button, vol+ and vol-