Hi! I want to unlock my LG's (L90 D405) bootloader so I could install Ubuntu on my device. My current firmware is v10d-EUR-XX and there's no "custom version" (I don't know what is it called but hopefully u understand what I mean) of that firmware. So I need to downgrade my firmware to v10a-EUR-XX. Then I could use files that I already have to unlock the bootloader. My problem is that I don't have original v10a-EUR-XX.kdz file. Does anyone here have it?
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I have a lg fle D950 factory unlock i use it with tmobile no issue with lte , I have root but am on 4.2.2… question is am trying to update but can't and want to know if in order to update I must install tmobile rom if so how do I go abaut it…
Hello
If there is D950 version without brand - then U can flash it. Just simply go there: http://lg-firmware-rom.com/, and using your imei, you will be able to download lastest software for your phone.
now i know why everytime i manual update my p9 plus c636b103 to higher firmware is making it c900. its because my p9 plus is locked to its network carrier and the network smart is not releasing the ota for p9 plus. i have a vendor of smart country ph.,
pls bare to read as your knowledge/experience will help alot not only to me but to the future whom might get the same questions as mine. pls answer every questions./problems i have encountered thank you.
Q:#1 as i understand i think i need to do the debranding?? to unlock my p9 plus from my network, at first it made me so confused because my sim is unlocked i can use any sim. but then i realized its still locked in system updates from smart ph.
Q:#2 do i need to unlock bootloader install twrp and root the p9 plus first before contiunuing to the vdo of debranding?
Problem: #1, i dont fully understand the vdo of droidth in debranding the unit. i got lost of understanding in the changing of ro. build. id something like that. i tried to do the extracting the verlist but when i open the extracted verlist. img in notepad i only get random letters and symbols(ex. b&+g~), but in the video i should see vie/nxtc636b***. so i really got lost.
Problem: #2. i know i need the unlock code from huawei website.before i can unlock bootloader and i already get a code but the problem is i forgot to right it down as i only txted it to my number which i also use in my p9plus and i factory reset my p9 plus when i install back to c636b103 because if i dont factory reset after install b103 i got null imei, camera crashes, internal storage none. but after factory reset its ok.
so how am i gonna get a code again? is it still possible to get the code again? can someone pls put the link? thx.
thank you.
your reply will be much appreciated.
Yes, you need to debrand your phone and install the generic firmware for your region (for example, c432 firmwares for europe). In order to do this, you need unlocked bootloader and twrp. Root is optional, it depends on how you want to change the OEMinfo. For the unlock code I think you can ask it again to huawei in the same way you asked for it the First time. For problem#1, sorry but I have no idea what you are talking about because I didn't use that guide. Maybe try to root the phone and then edit the file directly on it with somethin like root explorer.
xtype23 said:
Yes, you need to debrand your phone and install the generic firmware for your region (for example, c432 firmwares for europe). In order to do this, you need unlocked bootloader and twrp. Root is optional, it depends on how you want to change the OEMinfo. For the unlock code I think you can ask it again to huawei in the same way you asked for it the First time. For problem#1, sorry but I have no idea what you are talking about because I didn't use that guide. Maybe try to root the phone and then edit the file directly on it with somethin like root explorer.
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can i use any firmware in debranding? and should i first go back to b103? i have frimwares here b180 b190 b170 b130 b362.. all ar3 c636, what should i use? and can i do now the debranding process even if im still on c900b180?
Since you are on C900, I believe your cust is broken. Read here: https://www.google.it/amp/s/forum.xda-developers.com/p9/how-to/how-to-change-cust-c900-c432-t3392824/amp/ note: it's about p9, don't download or flash anything from there.
Now if you want you can try these steps:
1- unlock bootloader (if it's still locked)
2- install twrp
3- flash via twrp the attached file (ONLY if your phone is supposed to be L29-C636, which I believe it is)
4- install a C636 firmware with DLOAD metod
Now you should be on C636 firmware with a debranded phone.
I'm on the stock rom BAH2-W19 8.0.0.230 C431 in Germany and the unlock procedure doesn't work. I was wondering if downgrading to a previous version would let the unlocking procedure work and if it is required or not to maintain the same 'version' on the downgraded rom.
In short: on this firmware BAH2-W19 8.0.0.230 C431, can i flash a older one like BAH2-W19 8.0.0.179(C431) or maybe this other one BAH2-W19 8.0.0.217(OCEC432) ?
P4p3r1n0 said:
I'm on the stock rom BAH2-W19 8.0.0.230 C431 in Germany and the unlock procedure doesn't work. I was wondering if downgrading to a previous version would let the unlocking procedure work and if it is required or not to maintain the same 'version' on the downgraded rom.
In short: on this firmware BAH2-W19 8.0.0.230 C431, can i flash a older one like BAH2-W19 8.0.0.179(C431) or maybe this other one BAH2-W19 8.0.0.217(OCEC432) ?
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Generally (well known for various other Huawei phones), submodel and cust must be followed.
They can be changed, aka rebranded, but only with unlocked Bootloader, since it requires flashing OEMInfo
Also, be careful when downgrading, if you go to an old version of Bootloader (usually it coincides to before GPU Torbo or firmwares with Security patch from the first half of 2018 or earlier), then it causes a serious brick.
To the other side, downgrading to the same Bootloader version does not help to ease getting the BL code.
Btw, Bootloader version can be inspected from a particular Hex address from xloader img, which can be extracted from update.app by Huawei UpdateExtracror (Windows program), that must be unzipped from update.zip, downloaded from a FullOTA firmware from FF
For that reason, people use Testpoints method to erase and then flash the old firmware (board image, if available for the particular device) to be able to downgrade the BL, and thus to be able to buy BL code the old way, simply based on providing IMEI and Serial number
zgfg said:
They can be changed, aka rebranded, but only with unlocked Bootloader
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This means that the ROM i'd have to download has to be of the same branding (C431). At least here, to flash a C432 for downgrading would not work.
zgfg said:
be careful when downgrading, if you go to an old version of Bootloader
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My intention was to downgrade the firmware so that it would flash a previous version of the bootloader. You understood the point
zgfg said:
unzipped from update.zip, downloaded from a FullOTA firmware from FF
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What is FF ?
So, in short, if I really want to downgrade the firmware, I have to download a ROM from FF* of the same brand (C431), then extract the xloader img using the Extractor tool, compare this to my current version of the firmware and re-download any other ROM from FF until I see that the downloaded ROM has got a previous version of the bootloader. Flash this particular ROM. Is that correct?
I have not fully understood the "Testpoints method". Is it a real (documented) Method for flashing?
Thanks for your answer, it helped! Waiting now for this last feedback but until then, thank you!
P4p3r1n0 said:
This means that the ROM i'd have to download has to be of the same branding (C431). At least here, to flash a C432 for downgrading would not work.
My intention was to downgrade the firmware so that it would flash a previous version of the bootloader. You understood the point
What is FF ?
So, in short, if I really want to downgrade the firmware, I have to download a ROM from FF* of the same brand (C431), then extract the xloader img using the Extractor tool, compare this to my current version of the firmware and re-download any other ROM from FF until I see that the downloaded ROM has got a previous version of the bootloader. Flash this particular ROM. Is that correct?
I have not fully understood the "Testpoints method". Is it a real (documented) Method for flashing?
Thanks for your answer, it helped! Waiting now for this last feedback but until then, thank you!
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FF = Firmware Finder.
Find a thread on XDA, search for XDA Huawei FirmwareFinder.
There is the FF apk on Playstore and FF exe for PC, you can also search firmwares directly from their server:
https://pro-teammt.ru/online-firmware-database-ru/
You don't really need to extract xloader.img (there is also a thread on XDA for Huawei Update Extractor and there was a thread for a special PC program analyzing the required bytes in xloader.img).
Instead, you can read Changelogs by FF, and you will see when there was the upgrade to GPU Turbo, and also which Google Security Patch is coming with which version.
Hence, in short - your intention was to 'cheat' by downgrafing to the old Bootloader, so that you can get the BL code easy and cheap.
Unfortunately, do not go for - you will brick your Huawei device.
(Many people tried similarly, with various Huawei phone models, and bricked them)
For TestPoints search similarly for XDA Huawei TestPoints. Generally, you have to physically open the phone, find the TestPoints pins (picturures can be found on the Net) on the motherboard, two of them have to be shortened
Then you will need a special Huawei loader and USB driver (there is one for Windows and one for Linux), and a board image to flash (there are sites on the Net selling the board images).
That way you can unbrick the phones or downgrade (as you wanted) to the older firmware (with the older Bootloader version)
P4p3r1n0 said:
My intention was to downgrade the firmware so that it would flash a previous version of the bootloader.
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I realized there is not much to gain if I'd flash a previous bootloader. The original issue was that I thought I couldn't 'unlock' this one, instead I can and did it (check out the unlock thread).
All the others information are still useful, so thank you!
Heloo
Got my LM-V405 ATT unlocked version,
So i want to cross flashing to other version is it possible?
Cauze i wanted for android upgrade... It stuck on oreo, and im using this devices in indonesia,
Thankyou verymuch
hi for korea maybe not possible, but it is possible flash to v405qa usa unlocked or european v405ebw with crossflash
Fredo2 said:
hi for korea maybe not possible, but it is possible flash to v405qa usa unlocked or european v405ebw with crossflash
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hello thank for answer , can you give me tutorial to do cross flashing?
ok first download and instal LGUP_Dev_Frame_Ver_1_15_0_6, after instal usb driver LGMobileDriver_WHQL_Ver_4.2.0
in disc C\program filles find lg electronics\LGUP\model here make a new folder with the name (common) and in this folder common copy dll file- https://www.mylgphones.com/lgup-dll-for-lg-v40-thinq-version1-9-39-7.html this dll(LGUP_DLL_for_V40.zip)
now put the phone in download mode with usb to the pc
open powershell from the LGUP folder and type cmd enter
now indicate the address to the kdz file folder on your PC, in my case it was (lgup_cmd.exe com3 "C:\Program Files\LG Electronics\LGUP\model\common\LGUP_Common.dll" "D:\Zona Downloads\lg v40\V405EBW20d_00_OPEN_EU_DS_OP_1106.kdz)
if you have correctly indicated the address to the kdz file, firmware update will start
wait up to 100%
my phone
I believe I tried this days ago. However, after days of trying, I reread this, and it is clear to me that there are two problems with these instructions: 1. Firstly so many other threads say use only 1.16 and above for this phone. 2. you don't offer a patched link. The standard dev requires special passwords and doesn't offer a way to register.
I haven't found a dev version above 1.14 that was patched. Someone offered a patched 1.15 that supposed to help. But non of the dlls work, which I suspect is because no lgup can work with lg v405ua, below a patched 1.16 dev. I don't think I have found that unicorn yet.
Hello everyone, I just want to ask. I've Xperia XZ2, it's AU Model (SOV37), using Global Firmware (H8216).
I want to flash back into it's original firmware in order to use the NFC.
I already download the Japan Firmware (SOV37_KDDI JP_52.0.C.5.295-R13B), but I'm afraid that it will sim-locked if I flash it.
I'm also afraid that since this device wasn't able to unlock the bootloader (since the Bootloader Unlocked Allowed: No), can I still flash the firmware?
Can anyone show to me step by step how to flash the firmware (Not flash the STOCK ROM)?
Thanks in advance.
as long as you delete all the .TA files there shouldn't be any problem, though the latest japan firmware available is android 9
not sure what you mean by firmware though, since technically what you trying to do is flashing a firmware as in stock rom