V30 lost download mode with Jett's magical wifi fix - LG V30 Questions & Answers

Hey all,
I actually recreated this on both my LS998->US998 phones. I can get it to boot into download mode, but my computer doesn't even recognize a USB connection. It's driving me nuts, because I'd like to possibly fix the fingerprint issue once and for all.
I tried flashing the laf.bin from the 20b zip and it fails in Fastboot.
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash laf laf.img
target didn't report max-download-size
sending 'laf' (30168 KB)...
FAILED (command write failed (No error))
finished. total time: 0.002s
Help??
EDIT: I fixed this by flashing the 20B zip again in TWRP. Jett's magical BS definitely breaks download mode

TPMJB said:
Hey all,
I actually recreated this on both my LS998->US998 phones. I can get it to boot into download mode, but my computer doesn't even recognize a USB connection. It's driving me nuts, because I'd like to possibly fix the fingerprint issue once and for all.
I tried flashing the laf.bin from the 20b zip and it fails in Fastboot.
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash laf laf.img
target didn't report max-download-size
sending 'laf' (30168 KB)...
FAILED (command write failed (No error))
finished. total time: 0.002s
Help??
EDIT: I fixed this by flashing the 20B zip again in TWRP. Jett's magical BS definitely breaks download mode
Click to expand...
Click to collapse
Flashing US998 20e TWRP-FLASHABLE zip has fixed loss of Download mode for others with compatible North American variants.

ChazzMatt said:
Flashing US998 20e TWRP-FLASHABLE zip has fixed loss of Download mode for others with compatible North American variants.
Click to expand...
Click to collapse
Yeah I edited my post. I ended up flashing the 20B zip. Download mode was restored after that. After flashing the 30B kdz, I did not lose download mode. Only thing that made me lose download mode was Jett's magical backup, despite everyone telling me it was "impossible"

Related

LG G5 H830 adb issues

So straight to it, when I am trying to flash twrp recovery img with adb I keep getting failed (remote:unknown command) .
Process I have done;
Turned on oem unlock and debugging in developer otions
Unlocked boot loader via adb with fastboot oem unlock
Rebooted and got corruption msg but thats due to bootloader unlock
Put twrp in adb folder
Rebooted into fastboot
attempted to flash twrp recovery img via fastboot flash recovery twrp.img
Then thats when I get my error as follows;
target reported max download size of 536870912 bytes
sending 'recovery' (19412 kb) ...
okay [0.443s]
writing 'recovery' ...
failed (remote: unkown command)
finished. total time: 0.469s
Did I miss a step? I was reading something about a "fake" bootloader unlock besides h850?? I did achieve root with a tot file and lg up that did have already twrp baked in, but I need to get a stock rom so I can go ahead and switch between root and non root, cause I use an application for work that doesn't like root
i know this is an old post but i'm having the same issue. is it not possible to flash recovery with latest firmware?
same

LG G5 TWRP fastboot failing

Hi all,
I have an LG G5 H850. I'm trying to install TWRP using ADB. I've had it previously and it worked fine. I'm pretty sure the bootloader is unlocked. Anyway, when I do "fastboot flash recovery twrp-3.1.1.1-0-h850.img" I get the following output:
target reported max download size of 536870912 bytes
sending 'recovery' (19076 KB)...
OKAY [ 0.431s]
writing 'recovery'...
OKAY [ 0.345s]
finished. total time: 0.781s
To me, that looks as though thats worked fine. Now when I try fastboot boot twrp-3.1.1.1-0-h850.img I get the following:
downloading 'boot.img'...
OKAY [ 0.432s]
booting...
FAILED (remote: unknown command)
finished. total time: 0.456s
Has anyone got any ideas on this?
Same here
I am having the same problem, please help
Had this issue a while back. I resorted to doing complete flash with LGUP to the latest version and then it worked. I had been messing around with various ROMS on different android versions.
lywyn said:
Had this issue a while back. I resorted to doing complete flash with LGUP to the latest version and then it worked. I had been messing around with various ROMS on different android versions.
Click to expand...
Click to collapse
Don't happen to know where I could get a rom that it would work with do you?
Managed to solve this. Flashed the TWRP image using fastboot flash recovery <img> via adb. Then I unplugged from USB, and got into recovery mode by doing power + volume down buttons and quickly release and repress ont he LG logo. Answered yes to both questions and got into TWRP.
Barsbeh said:
Managed to solve this. Flashed the TWRP image using fastboot flash recovery <img> via adb. Then I unplugged from USB, and got into recovery mode by doing power + volume down buttons and quickly release and repress ont he LG logo. Answered yes to both questions and got into TWRP.
Click to expand...
Click to collapse
That is the required way of doing it. You have to boot into recovery after flashing the recovery or it gets reset.
Hi,
Having a similar problem since trying to update my ROM ... and the Magisk install failed. Now I can only get to fastboot, can't get to recovery. And, tried this,
Code:
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash recovery twrp-3.1.1-0-h830.img
target reported max download size of 536870912 bytes
sending 'recovery' (18644 KB)...
OKAY [ 0.439s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.461s
Help!?! ... and thanks!

[Q] cant flash TWRP h830

this is the first time i have owned an LG phone. I have the bootloaded unlocked and usb debugging enabled. I have read just about every guide i could find but i still cant manage to flash twrp.
i am trying to flash the latest twrp-3.2.1-0-h830.img
i am showing build number NRD90U and software version H83020a.
i am getting this error message trying to flash thru either adb or minimal adb and fastboot programs:
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash recovery twrp.img
target reported max download size of 536870912 bytes
sending 'recovery' (18700 KB)...
OKAY [ 0.511s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.531s
any suggestions would be appreciated. thanks
https://forum.xda-developers.com/tmobile-lg-g5/development/root-h830-20a-nougat-lg-g5-hard-t3542496 this should show you how
tensux said:
this is the first time i have owned an LG phone. I have the bootloaded unlocked and usb debugging enabled. I have read just about every guide i could find but i still cant manage to flash twrp.
i am trying to flash the latest twrp-3.2.1-0-h830.img
i am showing build number NRD90U and software version H83020a.
i am getting this error message trying to flash thru either adb or minimal adb and fastboot programs:
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash recovery twrp.img
target reported max download size of 536870912 bytes
sending 'recovery' (18700 KB)...
OKAY [ 0.511s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.531s
any suggestions would be appreciated. thanks
Click to expand...
Click to collapse
If you already have TWRP before just use the app.
If its the first time you flash twrp using the Recowvery method, make sure you have a copy of the recovery.img on your internal memory. :good:
rflores said:
https://forum.xda-developers.com/tmobile-lg-g5/development/root-h830-20a-nougat-lg-g5-hard-t3542496 this should show you how
Click to expand...
Click to collapse
cheeze.keyk said:
If you already have TWRP before just use the app.
If its the first time you flash twrp using the Recowvery method, make sure you have a copy of the recovery.img on your internal memory. :good:
Click to expand...
Click to collapse
Hi thanks for the replies.
I finally got it to work after a couple days of a soft brick at lg firmware update. i used Easyrecowery and and for some reason needled to toglle between file transfer and phot transfer while getting stuck while the scripts were processing
https://forum.xda-developers.com/tmobile-lg-g5/how-to/guide-root-twrp-lg-g5-using-t3580264
now to flash lineageos

Recover H932 with stuck boot

Anyway to recover my device that:
Fastboot accessible
Lost twrp
Download mode doesn't seem to work (it restart itself after 15 second or so)
Stuck on Tmobile bootup
Was trying to install exposed
factory reset > flash 20o > flash framework
Now can't seem to get it to boot up
Try to use fastboot to flash twrp
C:\adb>fastboot flash recovery twrp.img
target reported max download size of 536870912 bytes
sending 'recovery' (30860 KB)...
FAILED (remote: unknown command)
finished. total time: -0.000s
try fastboot update.zip
C:\adb>fastboot update update.zip
archive does not contain 'android-info.txt'
error: update package 'update.zip' has no android-info.txt
LG Up does detect device, but trying to Refurb or anything will get stuck at 4% waiting for device
Thanks
did you figure it out?
somekids said:
Anyway to recover my device that:
Fastboot accessible
Lost twrp
Download mode doesn't seem to work (it restart itself after 15 second or so)
Stuck on Tmobile bootup
Click to expand...
Click to collapse
If you have T-mobile H932 you do not have fastboot flash commands. You can boot into fastboot, but it's basically useless.
somekids said:
Try to use fastboot to flash twrp
C:\adb>fastboot flash recovery twrp.img
target reported max download size of 536870912 bytes
sending 'recovery' (30860 KB)...
FAILED (remote: unknown command)
finished. total time: -0.000s
try fastboot update.zip
C:\adb>fastboot update update.zip
archive does not contain 'android-info.txt'
error: update package 'update.zip' has no android-info.txt
Click to expand...
Click to collapse
T-mobile H932 does not have fastboot flash commands so you can't use fastboot to install TWRP with fastboot. That's the whole reason @runningnak3d had to create a whole new method -- using a Linux boot flash drive while on 10d Nougat -- to get TWRP onto T-mobile H932. You know this if you rooted your T-mobile H932!
You will have to do that all over again if you really lost TWRP.
The T-mobile H932 is a standalone island unto itself and is the hardest V30 variant to install TWRP on and root. All the others use the WTF method.
This and another reason is why only T-Mobile customers should use T-Mobile H932.
---------- Post added at 09:45 AM ---------- Previous post was at 09:37 AM ----------
somekids said:
LG Up does detect device, but trying to Refurb or anything will get stuck at 4% waiting for device
Click to expand...
Click to collapse
Especially if you updated to Pie KDZ/TWRP-flashable zip, make sure you are using the latest Dev Patched LGUP from T-mobile H932 Pie KDZ thread. Any earlier dev patched LGUP will only work on Oreo or lower. Follow the installation instructions, be sure to UNinstall any prior versions.
[H932][STOCK][PIE]LG V30 U.S. T-Mobile H932 H93230d_00_0902.KDZ
https://forum.xda-developers.com/lg-v30/development/h932-lg-v30-s-t-mobile-h932-t3952258
ChazzMatt said:
If you have T-mobile H932 you do not have fastboot flash commands. You can boot into fastboot, but it's basically useless.
Click to expand...
Click to collapse
Well, you can still use H932 fastboot to unlock bootloader. And no hoops required to do that. And that's just about the only good thing about H932 ?
sadly, it was a year ago. I've noticed that installing xposed is dangerous as flashing custom rom even using magisk module, it sometimes make your phone boot loop, or fail to boot at all. any emergency tools such as Recovery, Laf download mode, should be present on their phone (at least one)

Issues installing TWRP on LG V30

I've been struggling to get TWRP on my V30 (H932) from T-Mobile. I have already unlocked Bootloader and have activated USB debugging. I open File Explorer on my PC and go to my ADB folder where i have placed the TWRP.img file. On the search bar i type CMD in order to open a command window. Then i type "adb reboot bootloader" and my phone goes into fastboot mode. I have tried typing "fastboot flash recovery" and also "fastboot flash recovery_ramdisk" followed by the name of the TWRP file. Unfortunately, this is where i've been getting stuck. i get the following message:
C:\adb>fastboot flash recovery_ramdisk TWRP-3.2.3-7.img
target reported max download size of 536870912 bytes
sending 'recovery_ramdisk' (30860 KB)...
FAILED (remote: unknown command)
finished. total time: 0.013s
I'm not sure what i'm doing wrong in these steps. I have also tried renaming the TWRP file to "TWRP.img" but i get the same message. I read somewhere that using the OEM cable that came with the phone sometimes helps. I no longer have that cable so i can't try that. I would very much appreciate any suggestions to this problem. Thank You!
TvvK88 said:
I've been struggling to get TWRP on my V30 (H932) from T-Mobile. I have already unlocked Bootloader and have activated USB debugging. I open File Explorer on my PC and go to my ADB folder where i have placed the TWRP.img file. On the search bar i type CMD in order to open a command window. Then i type "adb reboot bootloader" and my phone goes into fastboot mode. I have tried typing "fastboot flash recovery" and also "fastboot flash recovery_ramdisk" followed by the name of the TWRP file. Unfortunately, this is where i've been getting stuck. i get the following message:
C:\adb>fastboot flash recovery_ramdisk TWRP-3.2.3-7.img
target reported max download size of 536870912 bytes
sending 'recovery_ramdisk' (30860 KB)...
FAILED (remote: unknown command)
finished. total time: 0.013s
I'm not sure what i'm doing wrong in these steps. I have also tried renaming the TWRP file to "TWRP.img" but i get the same message. I read somewhere that using the OEM cable that came with the phone sometimes helps. I no longer have that cable so i can't try that. I would very much appreciate any suggestions to this problem. Thank You!
Click to expand...
Click to collapse
Did you not see the H932 root thread?
Sent from my LG-H932 using XDA Labs
https://forum.xda-developers.com/lg-v30/how-to/root-h932-lafploit-1-5-to-v20a-t3842550
TvvK88 said:
I'm not sure what i'm doing wrong in these steps.
I would very much appreciate any suggestions to this problem. Thank You!
Click to expand...
Click to collapse
You're trying to reinvent the wheel.
The U.S. T-Mobile H932 was the last V30 to be rooted (August 2018 vs May 2018 for all the others) because T-Mobile removed most of the fastboot flash commands.
@runningnak3d had to create a process to get TWRP onto T-Mobile H932 and root it.
See link above. It's CLEARLY labelled "Root H932". IF you happen to go to the WTF instructions thread (the way to root all the other V30), I also have a link pointing to the ROOT H932 thread for T-Mobile H932 users.
Did you not search this forum any?
Was not aware of this. I'm kinda new at this so I didn't think to search specifically for the T-Mobile version. Thank you for the link.:good: I appreciate it.

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