yashsingh1/xdaforums huggingface dataset:
[Huawei P20 Pro Questions & Answers] HrnSrky:
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash KERNEL KERNEL.img

target reported max download size of 471859200 bytes

sending 'KERNEL' (24576 KB)...

OKAY [ 0.536s]

writing 'KERNEL'...

FAILED (remote: Command not allowed)

finished. total time: 0.546s

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash recovery KERNEL.img

target reported max download size of 471859200 bytes

sending 'recovery' (24576 KB)...

OKAY [ 0.537s]

writing 'recovery'...

FAILED (remote: partition length get error)

finished. total time: 0.567s

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash RECOVERY_RAMDISK RECOVERY_RAMDIS.img

target reported max download size of 471859200 bytes

sending 'RECOVERY_RAMDISK' (32768 KB)...

OKAY [ 0.719s]

writing 'RECOVERY_RAMDISK'...

FAILED (remote: Command not allowed)

finished. total time: 0.730s

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash RECOVERY_RAMDIS RECOVERY_RAMDIS.img

target reported max download size of 471859200 bytes

sending 'RECOVERY_RAMDIS' (32768 KB)...

OKAY [ 0.710s]

writing 'RECOVERY_RAMDIS'...

FAILED (remote: Command not allowed)

finished. total time: 0.722s

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash system system.img

target reported max download size of 471859200 bytes

sending sparse 'system' 1/9 (460796 KB)...

OKAY [ 10.624s]

writing 'system' 1/9...

OKAY [ 2.093s]

sending sparse 'system' 2/9 (449804 KB)...

OKAY [ 10.284s]

writing 'system' 2/9...

OKAY [ 2.007s]

sending sparse 'system' 3/9 (460796 KB)...

OKAY [ 10.536s]

writing 'system' 3/9...

OKAY [ 2.006s]

sending sparse 'system' 4/9 (460796 KB)...

OKAY [ 10.537s]

writing 'system' 4/9...

OKAY [ 2.020s]

sending sparse 'system' 5/9 (460796 KB)...

OKAY [ 10.512s]

writing 'system' 5/9...

OKAY [ 2.027s]

sending sparse 'system' 6/9 (460796 KB)...

OKAY [ 10.536s]

writing 'system' 6/9...

OKAY [ 1.779s]

sending sparse 'system' 7/9 (460796 KB)...

OKAY [ 10.667s]

writing 'system' 7/9...

OKAY [ 1.971s]

sending sparse 'system' 8/9 (460796 KB)...

OKAY [ 10.571s]

writing 'system' 8/9...

OKAY [ 2.144s]

sending sparse 'system' 9/9 (319468 KB)...

OKAY [ 7.303s]

writing 'system' 9/9...

OKAY [ 1.513s]

finished. total time: 109.152s

nothing changed :(((
[Huawei P20 Pro Questions & Answers] kikireki:
This method has helped me more than 30times, I brick my phone almost every other day. I always go back with this method.

What firmware are you on?

If you could install TWRP, you could try the HuRUpdate method.
[Huawei P20 Pro Questions & Answers] SUPNYUS:
Maybe you choosed the wrong firmware, what is your exact model ?
[Huawei P20 Pro Questions & Answers] HrnSrky:
i was using CLT-L29C432E5R1P7B108-log (9.0.0.108) than i tried twrp and

it was need format data also i did.

after i flash 9.0.0.163 by HuRUpdate .. everythings was good until flash magisk :(

first i was getting boot and recovery error in the fastboot page. then i fix it fastboot working normally .

erecovery working but cannot get any data from server fail.. (i think it look for android 9 on server but pie is not available for update now)

https://xdaforums.com/attachment.php?attachmentid=4664101&stc=1&d=1544625662
[Huawei P20 Pro Questions & Answers] HrnSrky:
i tried CLT-L29C432E5R1P7B108-log (9.0.0.108)

CLT-L29C432E5R1P9B163 (9.0.0.163)

CLT-L29C432B157 (8.1.0.157)

CLT-L09C432B161 (8.1.0.161)

Which firmware should i exact and flash ?

now info:
[Huawei P20 Pro Questions & Answers] kikireki:
Go to Firmware Finder, get the CLT-L29C432B157 (8.1.0.157).

You should have 3 files to download. Then follow the HuRUpdater method.

I had the exact same problem with trying to root 9.0.
[Huawei P20 Pro Questions & Answers] HrnSrky:
but 157 have just a file (update.zip) dont have 3 files...hve any link with 3 files
[Huawei P20 Pro Questions & Answers] Luis2k33-XDA:
The OTG method is a usb drive connected to the PC? in exFAT? also i didnt see the dload folder in neither firmware i downloaded
[Huawei P20 Pro Questions & Answers] forever_lol:
Usb drive must be connected to your phone using usb c - usb adapter. If you download your fw from firmware finder then indeed you won't find that folder. It's only in packages taken from androidhost.ru. I don't know how it looks for other models but it worked for my clt l29.
[Huawei P20 Pro Questions & Answers] bosancieros:
Please help me hw/demo

Hello Friends. I hope you can help me. I'm here since a week seating and trying to flash my p20pro back to alive but still nothing.

So i purchased the access for 30 days on funkyhuawei to reflash my phone and i can flash it but after that i'm again in eRecovery menu and can only restart.

So my bootloader was ubnlocked and after i've flashed over hiSuite it's again locked. My question is which exactly fw i have to put in dload map to try that. I've downlaoded some and it stucks on 5% when installing update. So please help me what can i do.

Btw, it's was branden with a demo fw. HEre are the infos about the phone:

PS C:\adb> fastboot oem get-product-model

...

(bootloader) CLT-L29

OKAY [ 0.000s]

finished. total time: 0.000s

PS C:\adb> fastboot getvar vendorcountry

vendorcountry: hw/demo

finished. total time: -0.000s

PS C:\adb> fastboot oem get-build-number

...

(bootloader) :CLT-L29 9.0.0.163D(C432E5)

OKAY [ 0.000s]

finished. total time: 0.000s

PS C:\adb> fastboot oem oeminforead-SYSTEM_VERSION

...

(bootloader) :CLT-L29 9.0.0.108(C432E5R1P7log)

OKAY [ -0.000s]

finished. total time: -0.000s

PS C:\adb>
[Huawei P20 Pro Questions & Answers] bosancieros:
Can nobody help me?
[Huawei P20 Pro Questions & Answers] mpiekp:
Is ADB able to connect? Could try pushing an update or try otg usb with a full package from Fw finder.

When connected hold down both buttons and press power, emergency install should commence.
[Huawei P20 Pro Questions & Answers] oriveradel:
I get how to flash, but how do you extract kernel, recovery, and boot image from update package?
[Huawei P20 Pro Questions & Answers] oriveradel:
my phone did flash system img ok, however; I can not get my phone screen to come back on, stuck in bootloader, what else do I need to flash to recover screen?
[Huawei P20 Pro Questions & Answers] SUPNYUS:
Download Huawei Update extractor then put the update.app in the window (Disable header check or something like that in options in case of error)
[Huawei P20 Pro Questions & Answers] bosancieros:
So on my P20Pro it still doesn^t work with OTG Cable and without. The only thing I can flash is with FunkyHuawei but then I^m again in eRecovery menu.

I've tried a lot of usb sticks and connect them to a usb c otg cableand when i hold the volume up/down buttons, I get the message "Software Install failed"

What else could I try?

Thanks for Help.
[Huawei P20 Pro Questions & Answers] bosancieros:
solved

I've solved my DEMO Model and now its a EU Branded device.

i only flashed a demo FW and then rebranded it. So now everithing is ok and I have a Full working model now.

Thanks.
[Huawei P20 Pro Questions & Answers] StonebridgeGr:
**URGENT** i have my p20 pro 6/128 with 9.0 last version ROOTED somehow i found a article.. the root was success. Tried to flash official twrp with twrp app and then everything was like HELL.

If i let my phone boot says error! func no: 10 boot image. error no :2 load failed. i faced something simillar when trying to get into recovery sometimes.

I can get into erecovery cant format or download official firmware. I can get into fastboot, download mode. I am gonna tell you everything . every program i tried AND FAILED!

TRIED: multi tool for huawei ( i download a version i think its 165 something when i press flash selected the program closed)

TRIED: to FLASH like 10 times ramdisks, recoverys, CANT FIND BOOT.IMG.

TRIED: Re-flash 9.0 says missing zip files THATS IMPOSIMPLE NOTHING IS MISSING I AM SURE

TRIED: a guide that said to download firmware and i would find a folder named DLOAD. i did everything. COULDNT FLASH SOMETHING ON DOWNLOAD SAYS ERROR

TRIED: ALMOST EVERYTHING

PLEASE HELP ME, HOW TO FIX IT? its very important for me and for everyone who is facing the same problem

Phone infos From Multi tool program http://prntscr.com/min398

and the firmwares i tried 1) http://prntscr.com/min3tn

2) http://prntscr.com/min40j

REPLY TO ME TO SEE YOUR ANSWER
[Huawei P20 Pro Questions & Answers] SUPNYUS:
Maybe you can try this : https://xdaforums.com/huawei-p20-pro/how-to/guide-how-to-install-emui-9-android-9-t3839316/page1

Then replace the FLASH.bat by this one : https://xdaforums.com/showpost.php?p=77704187&postcount=120
[Huawei P20 Pro Questions & Answers] StonebridgeGr:
i did try 2 days ago with the flash.bat but i change something from it i think. i removed the .zip preffix from the file zip OR from the code

I dont remember exactly
[Huawei P20 Pro Questions & Answers] SUPNYUS:
So did it worked ?
[Huawei P20 Pro Questions & Answers] StonebridgeGr:
yeaap
[Huawei P20 Pro Questions & Answers] jerimiepalmer81:
p20 pro softbrick fix 100%

download firmware for your device firmware from https://www.getdroidtips.com/huawei-p20-pro-stock-firmware/ then the huawei update.app extractor tool from http://xdaforums.com/attachment.php?attachmentid=3262544 open the the firmware zip and extract the update.app file from the update_sd.zip and add it too the huawei extractor tool. move the images for cashe, cust, kernel and system and add them too fastboot folder. flash each using fastboot. eg fastboot flash cust cust.img same for each image. whaen finished fastboot flash erase userdata and boot system. this worked on my clt-l29 c432 emui 9.0 bootlooped with no access to either recovery.
[Huawei P20 Pro Questions & Answers] alvaromf:
Hello

Any idea why i get this error when fastboot flashing?

FAILED (remote: 'Command not allowed')
[Huawei P20 Pro Questions & Answers] SUPNYUS:
This depend on the command that you used. Could you share a screenshot of the commands you used ?
[Huawei P20 Pro Questions & Answers] alvaromf:
C:\Users\alvar\Downloads\Re-Flash+9.0\Re-Flash 9.0>fastboot devices

DXU0218425001655 fastboot

C:\Users\alvar\Downloads\Re-Flash+9.0\Re-Flash 9.0>fastboot flash cust cust.img

target reported max download size of 471859200 bytes

sending 'cust' (64409 KB)...

OKAY [ 1.753s]

writing 'cust'...

FAILED (remote: Command not allowed)

finished. total time: 1.782s

C:\Users\alvar\Downloads\Re-Flash+9.0\Re-Flash 9.0>

---------- Post added at 01:51 PM ---------- Previous post was at 01:44 PM ----------

C:\Users\alvar\Downloads\Re-Flash+9.0\Re-Flash 9.0>fastboot flash cust cust.img

target reported max download size of 471859200 bytes

sending 'cust' (64409 KB)...

OKAY [ 1.753s]

writing 'cust'...

FAILED (remote: Command not allowed)

finished. total time: 1.782s

C:\Users\alvar\Downloads\Re-Flash+9.0\Re-Flash 9.0>fastboot oem get-build-number

...

(bootloader) :CLT-LGRP2-OVS 9.0.0.163

OKAY [ 0.011s]

finished. total time: 0.011s

C:\Users\alvar\Downloads\Re-Flash+9.0\Re-Flash 9.0>fastboot oem oeminforead-SYSTEM_VERSION

...

(bootloader) :CLT-L29 8.1.0.156(C432)

OKAY [ 0.011s]

finished. total time: 0.012s
[Huawei P20 Pro Questions & Answers] vte3000:
Thanks Quazlqbal.

My build number is 9.0.0.203(C432E5R1P9), and the last build in https://androidhost.ru/search.html is 9.0.0.195(C432E5R1P9T8). Any problem with it? Can I continue or do I have to get the exact buil number as Quazlqbal says?

Edit: I found my build number in support.halabtech.com

Edit 2: I don't know how, but problem solved.
[Huawei P20 Pro Questions & Answers] acus123:
my phone is bricked, blank screen. bootloader is locked.... heres the info

fastboot oem get-product-model

...

(bootloader) CLT-L29

OKAY [ 0.003s]

finished. total time: 0.004s

fastboot oem get-build-number

...

(bootloader) :CLT-L29 9.0.0.241(C636E2R1P12)

OKAY [ 0.008s]

finished. total time: 0.010s

fastboot getvar vendorcountry

vendorcountry: hw/spcseas

finished. total time: 0.002s

fastboot getvar rescue_enter_recovery

getvar:rescue_enter_recovery FAILED (remote: FAIL:need all image flashed!)

finished. total time: 0.006s

fastboot oem oeminforead-SYSTEM_VERSION

...

(bootloader) :CLT-L29 9.0.0.168(C636E2R1P12)

OKAY [ 0.006s]

finished. total time: 0.009s

i can't find the dload file for CLT-L29 9.0.0.241(C636E2R1P12) ... can u help me pls... thanks..
[Huawei P20 Pro Questions & Answers] Cygnust:
Hi guys,

have the same problem as you, bricked P20 Pro with black screen and only fastboot accessible

here are my info

I tried to manually flash cust, cache, system and kernel but does not work.

I don't have usb otg at the moment but when I push power and both volume buttons, nothing happens ..

Do you think it will work if I find a usb otg cable ?

Many thanks
[Huawei P20 Pro Questions & Answers] Cygnust:
so .. tried with usb otg .. but no luck, still the same :(

Anyone could help ?
[Huawei P20 Pro Questions & Answers] QuazIqbal:
If you are suffering from downgrade brick and only black fastboot screen is being detected by pc then only solution is by test point method of flashing OTA file through DC phoenix ( a paid service and you have to open back cover for touching the test points.) Dload method will work only in the case where recovery is accessible and phone is not in hard bricked black screen.
[Huawei P20 Pro Questions & Answers] Cygnust:
Alright but I did not do a downgrade, for sure ..
[Huawei P20 Pro Questions & Answers] QuazIqbal:
How did you end up bricking?
[Huawei P20 Pro Questions & Answers] Cygnust:
Followed this guide : tried to update to 241 from link given ..

Result here

Seems like i'm not the only one .. : see here
[Huawei P20 Pro Questions & Answers] Cygnust:
[MENTION=6847651]QuazIqbal[/MENTION]

I tried to contact you with direct message because I don't get your situation. In this thread you said you manage to fix it but in this other thread you said you did not succeeded.

Did you have 2 different problems ?
[Huawei P20 Pro Questions & Answers] QuazIqbal:
I have faced different kinds of brick at different stages, this thread deals with softbrick which I managed to solve by Dload method. The other brick which I encountered happened during downgrade from pie to Oreo. This time I successfully un-bricked my device by flashing ota via DC Phoenix through test point method.

Seeing your case it appears that it’s unsafe to even upgrade to higher builds directly. This is completely bull ****. I swear this will be last Huawei device which I own.
[Huawei P20 Pro Questions & Answers] Cygnust:
Same ..

I currently hve a oneplus6, decided to switch because of crappy camera and lack of lineageos support for A/B partitions devices ..

Had a sale on P20 Pro, but did not see that they did not support unlocking bootloader.

My phone waited on a shelf during 1 month to be unlocked and here's the result ..

Next device will be either oneplus or xiaomi ..
[Huawei P20 Pro Questions & Answers] forever_lol:
Hi, I've alo suffered of the same x-loader brick after non successful rollback from 195. Luckily I got mainboard replaced under warranty repair.

One question, I thought DC phoenix/unlocker didn't support P20 Pro unbrick. Do they have mainboard software? (was it difficult to remove back cover) ?
[Huawei P20 Pro Questions & Answers] QuazIqbal:
DC phoenix works quite well for just flashing OTA, in my case board software was not required although board software for flashing with IDT is available now available for our device. DC HCU unlocker client doesn't work with our device. I gave my mobile to repair shop for removing the back cover, they had some kind of oven where they put the mobile and after enough heat they easily removed the back cover.
[Huawei P20 Pro Questions & Answers] QuazIqbal:
I'm waiting for one plus 7 to launch then I will swith over from this extortion cell (phone).
[Huawei P20 Pro Questions & Answers] Cygnust:
Just an update, sent it to service center, they told me it was a screen problem so they will change it (wtf ?)

Hope they don't change the main board so I keep my IMEIs and can unlock back my phone.
[Huawei P20 Pro Questions & Answers] Cygnust:
New update, now they tell me that it's a motherboard issue and they're gonna change it.

I guess my imei will change also and I won't be able to unlock ?
[Huawei P20 Pro Questions & Answers] forever_lol:
Yes. NEw motherboard = new IMEI.

After my motherboard was replaced (due to xloader brick caused by failed rollback from 195) my imei and S/N have been changed too.
[Huawei P20 Pro Questions & Answers] fatguy666:
Sorry for quoting an old post but how long does the process of sending the phone back and getting a working phone take? Not sure how much longer I can take using my old Z2 :(

I've contacted Huawei and they asked for all my info before sending the jiffy bag, unfortunately I'd deleted the invoice email from when I bought the phone so had to wait for the company I purchased from to POST me one!
[Huawei P20 Pro Questions & Answers] Cygnust:
it was a 15 min walk from my office.

They kept it for 3 days
[Huawei P20 Pro Questions & Answers] Grumps:
Did you have to do testpoint or did you fix it without doing that
[Huawei P20 Pro Questions & Answers] androidyeah...:
Oh My God, Thank you!! I have spent the day trying to fix my phone, even bought a funkyhuawei pass :), that did nothing for me!! But I flashed cache, cust, kernel and system. The delete userddata didnt work so i just rebooted and my phone has booted up!! :)
[Huawei P20 Pro Questions & Answers] Me4tGrind3r:
Oh my!!! That worked for me. Thank you so much. Took me some days but its running again.
[Huawei P20 Pro Questions & Answers] bialabs:
p20 pro no UPGRADE mode after flash bootloader+oeminfo with dc-phoenix

hello, i have flashed bootloader+oeminfo of my p20 pro (demo) with dc phoenix to convert to eu but then the device doesn't power on and no upgrade mode.

Now i get only USB COM 1.0 and fastboot (if i reflash bootloader+oeminfo).

You think i can fix or my device is dead?

thank you
[Huawei P20 Pro Questions & Answers] jerimiepalmer81:
From usb com 1.0 flash bootloader using DC phoenix. (If multiple options for your device, try each of your device type until one works.) Then flash oem info using DC phoenix. Reboot bootloader, flash system.img, userdata.img , kernel.img, cache.img, cust.img and recovery_ramdis.img of last ROM installed on device.
[Huawei P20 Pro Questions & Answers] :
Hi, I'm having same Brick Problem.

When I wanted to enable OEM Unlock, it was grayed out. When I did a full wipe on TWRP, my phone rebooted without finishing the process so i think i'm f****d. Now on bootloader I have:

PHONE Unlocked on red

FRP Lock on green

When I try to flash firmware images, the error says: FAILED (remote: Command not allowed)

I can't flash either recovery, system nor TWRP.

And Also I can't boot either System, Recovery nor e-recovery, it keeps on booting device in yellow

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot oem get-model

...

FAILED (remote: Command not allowed)

finished. total time: 0.012s

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot oem get-product-model

...

(bootloader) CLT-L29

OKAY [ 0.009s]

finished. total time: 0.010s

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot oem get-build-number

...

(bootloader) :CLT-LGRP2-OVS 9.0.0.163

OKAY [ 0.009s]

finished. total time: 0.010s

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot getvar vendorcountry

vendorcountry: hw/eu

finished. total time: 0.009s

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot getvar rescue_enter_recovery

getvar:rescue_enter_recovery FAILED (remote: FAIL:need all image flashed!)

finished. total time: 0.024s

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot oem oeminforead-SYSTEM_VERSION

...

(bootloader) :CLT-L29 8.1.0.156(C432)

OKAY [ 0.011s]

finished. total time: 0.011s

I tried OTG Mode but with NTFS flash, so I'll try now with exFAT flash, so that's my last test to do. Any clues?
[Huawei P20 Pro Questions & Answers] jerimiepalmer81:
You need to format/erase partitions. Fastboot format userdata fatsboot format system fatsboot erase cust fastboot erase cache fastboot erase kernel fastboot. Then flash android version equal or greater then the version installed at time of brick. Then begin by flashing system then so on and so forth. For the record twrp wipe data will soft brick every time.

---------- Post added at 02:01 PM ---------- Previous post was at 01:51 PM ----------

Forgive the horrible spelling.
[Huawei P20 Pro Questions & Answers] :
Hey, thank you for the answer. I tried what you said but as FRP is Locked (i think is because of this) when I try to format it says: FAILED (remote: Command not allowed)

Also if I try to reinstall from OTG, it doesn't even detect that there is a OTG update so it tries to boot with a bootloop
[Huawei P20 Pro Questions & Answers] chrissyyyw:
Hi all,

I have a P20 Pro that is stuck in fastboot mode with a black screen.

I tried to roll back to Oreo from .282. I flashed TWRP, the firmware install failed. I had the choice of factory reset or recovery mode and I went with recovery. Not had a display since.

Phone is responding to my laptop, I can reboot it etc using ToolAllInOne.

Can I rescue it?
[Huawei P20 Pro Questions & Answers] jerimiepalmer81:
Yes you can with test point. Removing the back glass is easier then I thought. Heat oven to 250 I put a small town around the phone and put in a bread loaf pan in the over for approx 20 min. Using pieces of a cut up pop can I slowly cut the glue holding the glass on. It honestly surprised me how easy it came with the heat. I had bought a replacement from Amazon that I never needed. You will need to pay for credits for DC phoenix, follow instructions provided for repair. https://www.dc-unlocker.com/DC-Phoenix-flash-repair-tutorial. Use the "flash as empty board" method. Then flash whatever ROM you need to move forward.
[Huawei P20 Pro Questions & Answers] :
Can I fix my P20 pro brick with DC Phoenix? Even if I can't format partitions as FRP is Locked?
[Huawei P20 Pro Questions & Answers] kessaras:
Actually there is a guide.

If for example for clt l29 c432 you download v270

https://androidhost.ru/Uss

You will also find instructions inside.
[Huawei P20 Pro Questions & Answers] DoricSan:
Hi guys.

This is where i'm totally stuck.

This OTG method do not work for me...

I use the USB adapter from a Galaxy S8 package, I plug my exFat formated USB key with the dload folder, I hold the +&- while restarting the phone, and... nothing happen.

This is going to kill the last brain cells I have.

Any clue ?
[Huawei P20 Pro Questions & Answers] Boooom12345:
I used a USB Micro B (Micro-USB) to USB Type C adapter as well as a USB-OTB cable (With a Micro-USB end hence I needed the adapter)

When my phone was operationan, I often used this cable and adabpter to transfer files to and from my P20 Pro, so I knew with 100% certainty that this worked on my Phone.

I held down the vol up and down keys and then held down the power key. Once I saw the Huawei Logo, I let go of the power key but continued to hold down the vol up and down keys until the recovery screen loaded.

I hope this helps....
[Huawei P20 Pro Questions & Answers] DoricSan:
Thanks for your reply mate.

That's exactly what I did.

3 possibilities:

- My 3 USB keys are broken (can't do anything except buy a new one)

- My dload folder is not valid (already checked many many times)

- This recovery method is broken on my phone (then I'm screwed)
[Huawei P20 Pro Questions & Answers] Zarapho:
sorry for re-opening this post.

recently my o20 pro bricked during a emui OTA update.

CLT L29 C432

BOOTLOADER UNLOCKED, FRP UNLOCKED

I have a blackscreen, over fastboot I my device is connected but I can't enter bootloader. neither over a FLASH.bat can't overwrite device because I get this error "No devices attached"

any solutions how to revive my phone? I don't have the OTG..