Fastboot commands do not work. - LG V20 Questions & Answers

So since the days of the Nexus I have been using fastboot commans and for some reason no matter what I try all commans fail on the V20.
I am trying to "fastboot erase boot", "Fastboot format system" and so fourth and they all fail. does anyone know why?
YES, It shows the devices connected through fastboot devices, just the commands fail...

Anyone?

I believe the fastboot flashing commands are only available on the unlocked US996 variant.

unlocked?

Yep, you either need an unlocked US996 (as in went to LG's site and got the bin file and did an OEM UNLOCK), or you need to have rooted some other variant (which uses a debug US996 bootloader as part of rooting).
All the others either don't have fastboot at ALL, or if they do have fastboot, the important commands are disabled -- none are usable.
-- Brian

Related

Please help. Not sure what to do next.

Hi all,
I have a Moto G5 Plus that I brought on Amazon Prime day (11/07/17). and after trying to install TWRP I have ran into problems.
Heres what happened and where I'm left.
1) I unlocked the Bootlloader via moto website. No problems I now receive the BS message about the phone being unlocked.
2) Tried flashing twrp_3.1.1-0_potter.zip using "fastboot flash recovery twrp_3.1.1-0_potter.img"
Whenever I performed this command and rebooted in recovery I was never taken into the TWRP screen, but taken a screen showing a droid on it back with a message saying no command. I found how to bring up the command menu, but trying to flash the custom roms from the stock recovery always failed.
3) I used this article https://forum.xda-developers.com/g5-...-plus-t3605667 and found using this did allow me to boot into the TWRP screen. The only difference i noticed was that when i used the article mentioned above to get into TWRP the phone displayed the Moto boot ami before going into TWRP. It never did this when i used the Flash command manually.
4) Once in TWRP i flashed supersu and the RR .img, wiped cache etc..
On exiting TWRP I was asked whether I wanted TWRP installed as a system app, i selected yes to this question and now.....
5) BRICKED!!!
My moto will only boot into fastboot now and I get this message:-
Start up failed:
the bs about software repair assistant etc.
ap fastboot Flash Mode (secure)
Error: failed to load kernel!
Fastboot Reason: Fall-through from charge boot mode
usb....
6) I tried using this article https://forum.xda-developers.com/g5-plus/how-to/npn25-137-33-stock-firmware-t3577081
But I'm unsure of this version to use?
My question is can anyone help me to at least get my phone working again. Thanks will be paid.
JammieB said:
I have a Moto G5 Plus that I brought on Amazon Prime day (11/07/17). and after trying to install TWRP I have ran into problems.
Click to expand...
Click to collapse
Which Amazon Moto G5 Plus did you buy on Prime Day? The cheaper subsidized Amazon Prime version with ads or the more expensive non subsidized version without ads?
Apparently you cannot unlock the bootloader on the subsidized ad based Amazon Prime version. This is well discussed. One such discussion from the Lenovo/Moto support forum:
https://forums.lenovo.com/t5/Moto-G5-Moto-G5-Plus/Is-there-anyway-to-unlock-my-Moto-G5-Plus-from-Amazon/td-p/3638019
If one does a forum search on this site they'll find past discussions indicating the bootloader on Amazon Prime subsided Moto G5 Plus phones cannot be unlocked.
Try the Toolkit.
Once in it flash the TWRP and boot_image and try rebooting. If that doesn't work flash the Stock ROM and then flash the TWRP and boot_image. Once you get those flashed you should be able to flash the latest TWRP using fastboot.
Please let me know if that fixed it.
Thanks,
CP
cyber_prometheus said:
Try the Toolkit.
Once in it flash the TWRP and boot_image and try rebooting. If that doesn't work flash the Stock ROM and then flash the TWRP and boot_image. Once you get those flashed you should be able to flash the latest TWRP using fastboot.
Please let me know if that fixed it.
Thanks,
CP
Click to expand...
Click to collapse
Thanks for the suggestion, however I have tried this toolkit already and when connecting the USB cable, the toolkit only ever says connecting to device, but never manages to actually connect. As such, no command from the toolkit can be run, as when tried I get a "no device" message.
Also when I try to use the toolkit to install Windows 64bit driver, the install stops telling me I have a newer driver installed already.
Do you think I should uninstalled the newer device driver or should the toolkit still connect using the newer driver?
bennor3814 said:
Which Amazon Moto G5 Plus did you buy on Prime Day? The cheaper subsidized Amazon Prime version with ads or the more expensive non subsidized version without ads?
Apparently you cannot unlock the bootloader on the subsidized ad based Amazon Prime version. This is well discussed. One such discussion from the Lenovo/Moto support forum:
https://forums.lenovo.com/t5/Moto-G5-Moto-G5-Plus/Is-there-anyway-to-unlock-my-Moto-G5-Plus-from-Amazon/td-p/3638019
If one does a forum search on this site they'll find past discussions indicating the bootloader on Amazon Prime subsided Moto G5 Plus phones cannot be unlocked.
Click to expand...
Click to collapse
Im 100% confident that my moto has had its bootloader unlocked and that I was not sold a Moto G5 Plus with amazon ads.....
Thanks for your suggestion though.
FIXED back to stock rom. Here's what I did:-
1) Downloaded the stock rom from https://forum.xda-developers.com/g5/how-to/npp25-137-33-stock-firmware-moto-g5-t3577084
Used the mega link it took 5mins (1.4 mbps) to download.
2) Then run these commands:- (thanks to https://forum.xda-developers.com/member.php?u=5033408)
fastboot oem lock begin
fastboot oem lock begin
fastboot flash partition gpt.bin
fastboot flash bootloader bootloader.img
fastboot flash logo logo.bin
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash dsp adspso.bin
fastboot flash oem oem.img
fastboot flash system system.img_sparsechunk.0
fastboot flash system system.img_sparsechunk.1
fastboot flash system system.img_sparsechunk.2
fastboot flash system system.img_sparsechunk.3
fastboot flash system system.img_sparsechunk.4
fastboot flash modem NON-HLOS.bin
fastboot erase modemst1
fastboot erase modemst2
fastboot flash fsg fsg.mbn
fastboot erase cache
fastboot erase userdata
fastboot erase customize (gave error about bootloader)
fastboot erase clogo
fastboot oem fb_mode_clear
fastboot oem lock
fastboot reboot
It still see the annoying unlocked bootloader screen, but my moto boots into the stock rom.
I'm not giving up on getting a custom rom onto this device, but thanks to anyone who's helped me to get back to square one.
JammieB said:
Thanks for the suggestion, however I have tried this toolkit already and when connecting the USB cable, the toolkit only ever says connecting to device, but never manages to actually connect. As such, no command from the toolkit can be run, as when tried I get a "no device" message.
Also when I try to use the toolkit to install Windows 64bit driver, the install stops telling me I have a newer driver installed already.
Do you think I should uninstalled the newer device driver or should the toolkit still connect using the newer driver?
Click to expand...
Click to collapse
I didn't install the drivers with the toolkit. Was your phone connected to it in fastboot mode? That's what I had to do to get it to detect mine.
If you can't get the toolkit to work you can still use fastboot to flash the included version of TWRP and the modified boot_image. They're located in TOOLKIT_DIR\resources\app.asar.unpacked\files.
CP

Locking bootloader fastboot issue Axon 7 A2017G

Hi. I need to send my phone for servicing due to battery issue. I tried to lock bootloader however I am having problems with Fastboot. I installed factory image for Marshmallow A2017GV1.0.0B11(SD rm_userdata)N rollback M that can be found here. I've used minimal_adb_fastboot_1.4.1_portable on windows 10. CMD running as administrator. The only Fastboot related command that return something is
Code:
fastboot devices
Commands like
Code:
fastboot flashing get_unlock_ability
fastboot flashing lock
gives me error "FAILED (remote: unknown command)"
Not sure what am I doing wrong. Is it wrong version of Fastboot that I use? The thing is I also tried that on Linux with Fastboot package and the same error occurred. I also tried different stock roms like B03 and B05 and the result was the same. I even installed ZTE_A2017GV1.2.0B04_Full_Stock_Reverter_by_tron1.zip but still no change. Not sure what am I doing wrong. Please help. Thanks

fastboot commands not reacting after oreo update

hi, yesterday i updated my bootloader unlocked and rooted g6 to oreo via lg bridge. so far so good. now i am trying to flash twrp with fastboot command but i only get "waiting for any device". i can put the phone into fastboot mode with adb command but then still no reaction to fastboot commands from there. usb debugging is on. allow oem unlocking is frozen (grey) in developer options but it says "oem alreasy unlocked".

Lock bootloader in Stock oreo

I am using A2017U, and for some reasons i unlocked my bootloader and flashed custom rom. Now i want to lock my bootloader but i tried several times to enter fastboot but the device is not entering fastboot through any mean, i tried through physical kepess through adb command, everything.
please help me.
teji007 said:
I am using A2017U, and for some reasons i unlocked my bootloader and flashed custom rom. Now i want to lock my bootloader but i tried several times to enter fastboot but the device is not entering fastboot through any mean, i tried through physical kepess through adb command, everything.
please help me.
Click to expand...
Click to collapse
Maybe by using Axon 7 EDL toolkit to enable fastboot first (Unlock option), then "fastboot oem lock" in fastboot mode. Refer to https://forum.xda-developers.com/showpost.php?p=78267172&postcount=200 . Warning : you need stock ROM (no changes in boot, recovery, system/root etc...) to avoid bricking your phone.

LG v20 h990 bricked

Hello. I have a lg v20 H990N. I flashed TWRP by dirty santa method and wanted to go back to stock. As per the instructions on the link https://forum.xda-developers.com/v20...-h990-t3624296, I used method 1a for going back to stock. I ran the code as mentioned in the method while using my backed up "abootbackup.img" but I accidently ran the code twice.
Code:
dd if=abootbackup.img of=/dev/block/bootdevice/by-name/aboot
sync
sleep 30
sync
After booting to bootloader. this is what I see written on the boot loader screen.
___________________________________
Welcome to fastboot mode for bootloader unlock:
*Quick Guidnance
1) Read Device Id
fastboot oem device-id
2) Write unlock key
fastboot flash unlock unlock.bin
3) Check boiotloader is unlocked
Fastboot getvar unlocked
*How to exit fastboot mide
USe "Fastboot reboot' command if fastboot is available
________________________________________
This is the meassage that pops up in fastboot. I can use fastboot but can't use "fastboot flash recovery twrp-3.0.2-1-h990.img" as it exits with error that remote: device is locked. I can't flash kdz with lg Up as Lg up says " there is no haadset connected". TWRP recovery is also not boot neither is the nougat rom that was installed. More \over my device is shown as "Kedacom USB device " in device manager in fastboot mode. Not in Com ports.
It apperas that my bootloader has locked somehow after flashing abootbackup and I can't unlock it as h990N is not supported by LG to unlock bootloader. screenshot attached.
Please help!!!
Yeah flashing the stock bootloader relocks most v20 variants, (the dirty santa bootloader can't truely unlock them, it just ignores the lock)
I'm not sure what you expected? Your link is broken, but it sounds like you reflashed stock firmware and then the stock bootloader and expected to be in a different situation than a fresh unrooted device?
You should be able to boot normally to Android or boot I to download mode and reroot from scratch.
.

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