I'm currently on firmware LMV500NAT-00-V20x-LAO-COM-OCT-27-2020+0, and am dying to get lineage os installed. But whenever I try to downgrade using LG UP, the software will auto close.
I'm guessing that it's some prevention measure by LG to stop users from downgrading, like Apple.
Does anyone have any guides on how to downgrade the firmware?
the thing i research about is that we have to unlock bootloader of phone first then we can flash or downgrade
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I have a H910 V20 bought in AliExpress. I can't update the phone, because I live in Brazil and have no AT&T here. I'd like to only update to Oreo without root. I think my phone has no root. I saw that only install the H915 KDZ firmware it goes to Oreo without the AT&T apps. But I'm afraid of the phone is not original H910 and I brick my phone after the update. How do I know if my V20 won't brick after the update? And what version of the H915 do I have to install? Here says H91010m, build NRD90M. Is only install with LGUP software. Can you halp me?
Gonna be honest with you:
Since you're on the H910 model (AT&T) and since there has never been a kdz for this variant. The only true way to install an update from official to official would be to use mobile data service and get the update rolled out to you via OTA. What i am saying is unless you root your phone, you'll be stuck on nougat stock. I say root your phone and download RR Second Screen builds, they are solid and worthy of a try but if that is not what interest you then no dice i guess. I might be wrong but that seems to be what i know of the H910.
Edit: If it happens to not be H910 then you may be in luck. I am useless on this but thought since i saw this, i would pitch in.
But I have to root? In the case I Just want the Android 8 Oreo. I do not want the root. Whats happen If I install the H915 Oreo KDZ? It Will brick? I Saw people talking that 915 firmware ia similar to the H910, but ia better because hás no ATT apps. It Works on H910?
wesley_fg said:
But I have to root? In the case I Just want the Android 8 Oreo. I do not want the root. Whats happen If I install the H915 Oreo KDZ? It Will brick? I Saw people talking that 915 firmware ia similar to the H910, but ia better because hás no ATT apps. It Works on H910?
Click to expand...
Click to collapse
Don't need root. You can use patched LG up program to partition DL which would cross flash whole firmware to the h915 Oreo.
It should work fine without root with everything running.
wesley_fg said:
But I have to root? In the case I Just want the Android 8 Oreo. I do not want the root. Whats happen If I install the H915 Oreo KDZ? It Will brick? I Saw people talking that 915 firmware ia similar to the H910, but ia better because hás no ATT apps. It Works on H910?
Click to expand...
Click to collapse
you can use my Oreo Rom I posted here > https://forum.xda-developers.com/showpost.php?p=77435592&postcount=64
this will wipe your phone but you will still be H910
darkknight200 said:
Don't need root. You can use patched LG up program to partition DL which would cross flash whole firmware to the h915 Oreo.
It should work fine without root with everything running.
Click to expand...
Click to collapse
I have a stock H910 ROM (NOugat) with no root, I heared some poeple had cellular reception problems, is this a true problem please ? Will I have to do somthing before flashing Canada KDZ on H910 ? Thanks.
Id like to downgrade my S7 from nougat to marshmallow. My current lowest factory reset option is nougat on bootloader version 3. Id like to downgrade to a downloaded stock firmware that uses version 1 of the bootloader.
my device is currently rooted and carrier unlocked
ive made a full backup of the nougat system, before ive done anything to it other than the rooting.
ive been reading around that some people were able to bypass the downgrade bootloader lock error in odin by first going into their desired downgraded firmware tar files and deleting any file that ends in .bin , and then successfully been able to flash the older firmware. what I want to know is if i decide to try this, and it still doesnt work in odin, or something still doesnt work properly - am i still able to fully restore from that backup ive just made? has anyone done this without issues? i hate the look and feel of nougat and oreo looks and feels the exact same...
i did make another thread about downgrading, but i didnt know nearly as much at the time. Been told downgrading is impossible and thats true, officially speaking. Id just like to know if anyone has been successful with this workaround.
What model, SM-G930F? Is OEM Unlocking turned on?
If it's a G930U/V/T/A/P then you won't be able to.
For the G930F so long as you don't have the latest Nougat version it shouldn't prevent downgrading. Otherwise upgrading up to Oreo then back down just by flashing in Odin should work, as Oreo doesn't have the downgrade lock that the newest Nougat has.
Beanvee7 said:
What model, SM-G930F? Is OEM Unlocking turned on?
If it's a G930U/V/T/A/P then you won't be able to.
For the G930F so long as you don't have the latest Nougat version it shouldn't prevent downgrading. Otherwise upgrading up to Oreo then back down just by flashing in Odin should work, as Oreo doesn't have the downgrade lock that the newest Nougat has.
Click to expand...
Click to collapse
model is sm-g930w8 but yes OEM unlocking is on, and so is usb debugging just to be on the safe side. It is running the very first version of nougat right now, 7.0. But the security patch is from feb 2018. Ive read that the bootloader itself is unlocked on this version of the phone though, its just that downgrade protection in the software that could get in the way, if what i read was correct? in the same place was where i read that deleting those bin files from the firmware i want to install would be a good workaround, it would make the bootloader not check it at all if i read it correctly.
i havent tried anything yet, ive been doing my research first to stay on the safe side. it might work without issues, but I want to be prepared for if issues do arise, what the correct next step should be to keep the device itself not bricked
Yea not 100% sure for the G930W8, it's the same SoC as the G930F but the firmware restrictions could be different since it's the Canada specific version
so, i decided to brave it and try it, since to read around you find alot of conflicting information... i was suspecting that odin would fail shortly after starting at sboot.bin if it was the bootloader thats the issue. but it didnt. it failed the very next step after that at param.bin.
anyone happen to know what param.bin means?
What files are you trying to flash? I have had the same problem, even though the bootloader is unlocked the device has efuses that prevent downgrade to older binary. I was using U2 binary and only managed to downgrade to nougat u2 binary version. Even when I skipped bootloader files, marshmallow would still give an error that system.img is version 0 where as device is v1
My note 8 had OneUI pushed to it about a week ago even though I kept refusing not wanting to while I was sleeping. It says my bootloader is v5. This is actually what it says (N950USQU5DSD3). My problem is that when I search for the firmware I'm wanting to downgrade to (the last oreo update possible for this particular phone) on Sammobile I can't find the one for At&t. I see ones for Verizon, sprint, etc. But nothing for at&t, which one am I supposed to use and where can I get it? This is going to be my very first downgrade/upgrade, really my first time doing anything like it on android. And I CAN do this right? There's nothing I should be aware of that makes what I'm trying to do not able to be done is there? The biggest reason I'm asking is because I have very limited tools to work with, I have a little 12" Acer aspire one (no disk drive) running windows 7 home basic, mobile hotspot from my wife's phone(the last software I tried to download and use came from xda out of a thread I found titled, "Stock Oreo N950USQS5CRF6 Odin*files*for AT&T*NOTE*8" it failed halfway through 2 nights ago during the beginning of storm, and the whole time it would only download around 32kbs so it literally to FOREVER! Only for it to fail halfway through. Was I wasting my time or was this in fact the firmware I'm looking for? If not, as I asked before, where could I find it?? Thanks a bunch for any help.
https://forum.xda-developers.com/at...n950u-stock-n950usqs5crf6-odin-files-t3821222
^^^^^^^Is this all I need? Do I need to follow this tutorial or a different one?? What version of odin, do I need anything else
Sorry for so much all at once, I really hate this update and want Oreo back.
https://forum.xda-developers.com/ga...m-n950u-u1-t3685884/post74087340#post74087340
Follow the steps from the above-linked post, and follow them very carefully. I did, and I was able to successfully downgrade from Pie to Oreo on my AT&T NOTE8.
I actually flashed the unlocked firmware, which has zero AT&T bloat. It works just fine for my needs. I don't think AT&T WiFi calling works on this unlocked firmware (I haven't tried - I don't use it).
Caveat emptor: whichever version of Oreo you choose (either the AT&T stock, or the unlocked firmware), we are stuck on the February 2019 Android security patch.
Only Pie gets the latest security patches. As long as you are ok with this, then proceed with the downgrade to Oreo!
pyrolad said:
Caveat emptor: whichever version of Oreo you choose (either the AT&T stock, or the unlocked firmware), we are stuck on the February 2019 Android security patch.
Only Pie gets the latest security patches. As long as you are ok with this, then proceed with the downgrade to Oreo!
Click to expand...
Click to collapse
A little off topic, but has anyone seen an AT&T security update for May yet? I'm still on April security, and it's basically mid June?
Tha k you I'll check it out when I get off work, I didn't know you could flash the unlocked firmware on a carrier locked phone
Let me get this straight. Can a locked bootloader AT&T SM-N9500U on Android 9, N9500USQU5DSD3 downgrade to Oreo? I thought this bootloader whould not let you go back.
I LOATH Pie and wan to go back to Oreo so bad, please tell me there is a for sure way. This is my first permanently locked bootloader phone and it's killing me not to flash an software I prefer.
I dont know I wish someone could tell me forsure whether it will work or not because now my phone is getting another software update notification so it's getting ready to force another update on me and I doubt after that I will still have bootloader v5. Can someone please verify whether my current bootloader (N9500USQU5DSD3) will downgrade successfully to back to oreo or not? I have the oreo firmware I want to use downloaded and ready to go which is (SM-N950USQU5CRL1). Can I downgrade to this without messing anything up?? Please I need a fast reply I dont want this new update forced to my phone and updating my bootloader to v5 where I can ever go back to oreo.
marhodges said:
Let me get this straight. Can a locked bootloader AT&T SM-N9500U on Android 9, N9500USQU5DSD3 downgrade to Oreo? I thought this bootloader whould not let you go back.
I LOATH Pie and wan to go back to Oreo so bad, please tell me there is a for sure way. This is my first permanently locked bootloader phone and it's killing me not to flash an software I prefer.
Click to expand...
Click to collapse
Yes you CAN downgrade back to Oreo. BUT you MUST go to a bootloader 5 firmware.
---------- Post added at 07:55 AM ---------- Previous post was at 07:54 AM ----------
Superloud024 said:
I dont know I wish someone could tell me forsure whether it will work or not because now my phone is getting another software update notification so it's getting ready to force another update on me and I doubt after that I will still have bootloader v5. Can someone please verify whether my current bootloader (N9500USQU5DSD3) will downgrade successfully to back to oreo or not? I have the oreo firmware I want to use downloaded and ready to go which is (SM-N950USQU5CRL1). Can I downgrade to this without messing anything up?? Please I need a fast reply I dont want this new update forced to my phone and updating my bootloader to v5 where I can ever go back to oreo.
Click to expand...
Click to collapse
Yes you can go to that firmware. You will want to back up and allow it to factory reset. Be sure to use the modified version of Odin. Go HERE, post #2
Ok I unlocked the boot while on Android Q and it messed up my fingerprint sensor. I was told that if you downgrade to Android Pie that it would fix my issue. What i need to know is , does this phone have a kfuse that stops us from downgrading like some other brand phones? How do i flash the downgrade zip from Asus website? Any help is appreciated. Also has anyone else in here downgraded from Android Q to Android Pie without making a brick lol .
Follow this thread, maybe you will get the result
https://forum.xda-developers.com/zenfone-6-2019/help/how-to-downgrade-android-q-to-p-t4023843
I bought a used S10e. It is Android 9, and OTA not find newer FW. Can i change the SW without risk?
Have you a noob tutorial, how can i do it?
Which ROM is suggested? Which have minimal bugs, and great battery time? I prefer the non-root original FW.
Android 9
G970FXXU3ASH3
Build: G970FXXU3ASH6
SAOMC_SM-G970F_OXM_XEH_PP_0014
Knox 3.3
Odin can upgrade, and downgrade FirmWare, when OEM unlocking is Enabled, in developers settings.
Downgrade too? I have andoid 11 and i wanna back to 10. There will be no problem with bootloader? (sometimes new android get new bootlader and then u cant back to old android - heard something like that)
edit:
I will answer myself: yes, U can downgrade without any issue
wmiki75 said:
Odin can upgrade, and downgrade FirmWare, when OEM unlocking is Enabled, in developers settings.
Click to expand...
Click to collapse
Does anybody know a legit source for Odin? The links provided are down :-(