Database Users

Bricked phone ?

Hi,
I tried to upgrade from v2.1 to new Android 2.3.5 Gingerbread For LG Optimus GT540 and I followed instructions exactly, but I am stuck at number 8, I did this:
8- Now click “Launch software update”, DO NOT USE THE PC TO THE PROCESS IS COMPLETE. THE PHONE WILL REBOOT WHEN FINISHED THE PROCESS IN KDZ. (The process takes about 15 minutes in KDZ).
and about 2 minutes text log writes and stopped, I am now waiting more then 40 minutes my phone didn't reboot. On display is still written download mode, what should I do now ?
In kdz is written:
3GQCT: wParam = 205. IParam = 36
p.s.
I disconnected phone from usb and pull out battery and now I cannot turn on phone, I tried to push vol down + power for 5 sec.
Any idea what should I do now? I hope I didn't brick my phone

What programs are you using?
What are you using to update your phone and have you tried taking out your SIM, SD card and battery then turned it on with the USB cable?

I used KDZ updater and tried to install CyanogenMod7 (2.3.5) @ GT540 Swiftdroid2 RC3 by Mur4ik. if that is what you ask ?
I removed sim card and battery also, then tried to turn it on while plugged in to computer usb but no response from phone, I can't turn it on
p.s. I am using win 7 64 bit OS

gorantz said:
I used KDZ updater and tried to install CyanogenMod7 (2.3.5) @ GT540 Swiftdroid2 RC3 by Mur4ik. if that is what you ask ?
I removed sim card and battery also, then tried to turn it on while plugged in to computer usb but no response from phone, I can't turn it on
p.s. I am using win 7 64 bit OS
Click to expand...
Click to collapse
If you can't get into download mode, then it's game over I'm afraid. What you will need to do is return the phone back to where you bought it. This happened to me some time ago. But the Carphone Warehouse were happy to fix it (even though I had voided the warranty but don't tell them that ). Don't say that you tried to mod the phone, say something like 'I installed LG's PC Suite and it said my device had a software update. I went along with it, but it gave me an error half way through. Now my phone won't turn on at all' It might just work!

I had the same problem when modding with kdz.
completely bricked my phone, but was able to fix by putting kdz into emergency mode instead of diag and updating with a fastboot stock rom,
it would stop after 2 minutes and give me and error but it managed to get fastboot onto my phone,
(camera + power)
then just flashed the fastboot method with adb and everything was fine,
my problem was something to do with lg modem drivers i believe,
I read a thread that said to disable the lg virtual modem. (didnt
work for me)
pretty noob myself
but the above method worked for me,
not sure if this can do anymore damage to the phone

have a look at this is u get it into emegancy mode.
On the kdz updater instead of 3GQCT put into emergancy
http://www.youtube.com/watch?v=fDmU9RSIiDA

If you have tried flashing with Cm7 you might be lucky,
try holding camera button and powering on the phone, a black screen should come up thats fastboot.
if that comes up u should be able to just reflash following mur4iks instruction
if not try what i said in my last post and reflsh with phone type 3QGCT and PhoneMode EMERGENCY
again only going of how i fixed my bricked phone

ZxWelshyxz said:
If you have tried flashing with Cm7 you might be lucky,
try holding camera button and powering on the phone, a black screen should come up thats fastboot.
if that comes up u should be able to just reflash following mur4iks instruction
if not try what i said in my last post and reflsh with phone type 3QGCT and PhoneMode EMERGENCY
again only going of how i fixed my bricked phone
Click to expand...
Click to collapse
He was trying to flash a fastboot rom (to install CM7) but bricked his device in the process. So he can't flash CM7-.-

Yeah I know that but I mean when I got the error he has, I flashed with a stock 2.1 fastboot rom With Diag changed to EMERGENCY and was able to get on to fastboot mode (camera+power), I got the error again as i was flashing but the phone would load fastboot and not start up
If he can get lucky and get into fastboot like i did, a simple:
fastboot -w
fastboot flash boot boot.img
fastboot flash system system.img
fastboot reboot
should fix his problem or did i just get lucky?
sorry if im confusing thinks here, but this is how i fixed mine. which was also dead and not turning on
Sent from my GT540 using XDA App

@ZxWelshyxz
I am total neewbie, can you write to me some kind of tut, like press that then do that etc

gorantz said:
@ZxWelshyxz
I am total neewbie, can you write to me some kind of tut, like press that then do that etc
Click to expand...
Click to collapse
Well like i told you im a noob at this myself (Android phone flashing atleast)
I suppose it would be good to see if you got fastboot??
Power on the phone while holding camera button (hold the camera button until the screen goes black) if you can get fastboot you can just follow the fastboot flash instructions after fastboot -w
if not on kdz in the top right were it says DIAG, Change this to CS_EMERGENCY,Click Launch update and flash again with a stock fastboot rom
after THIS see if the phone loads or boot loops(had this once too) or loads fastboot
Il try look to find the thread i read on another forum for troubleshooting kdz it helped me alot
EDIT: http://android.modaco.com/topic/321895-faqgt540-reference-thread/ try some of the troubleshooting tips at the bottom of the O.P
I basicly aimed to get fastboot working so make sure your flashing with a stock FASTBOOT! rom
again im new to this im just saying what got my phone back to life

my fone stuck in download mood what can i do?

corecrack said:
my fone stuck in download mood what can i do?
Click to expand...
Click to collapse
Pull out the battery and turn on the phone again (if you have knocked the phone when turning on, or flash a KDZ (when connected to PC)

@gorantz
Can i advise to follow step by step tutorial pin pointed by lavero.burgos, am a total neewbie like u man,but now using latest CM7 by Mur4ik and waiting for new release from devs
Sent from my GT540 using XDA App

thanks, but my phone is now at service when I get it back maybe I'll try....but maybe

gorantz said:
thanks, but my phone is now at service when I get it back maybe I'll try....but maybe
Click to expand...
Click to collapse
I bricked my phone and I tried it again after getting it back from lg

I'm new here and to having a Smartphone, I've just been given an LG Android GT540 which is at version 1.6. The LG site tells me I can upgrade to 2 something or other, sorry can't remember the exact number and gives instructions on how to do the upgrade, but I'm a bit on the cautious side as I don't want to brick it, not this early on in owning my first Smartphone.
I'll be reading a lot of the posts here to try and find out as much as I can before I attempt to do this.

Well don't worry if it's official update. But if you some how brick your phone just tell lg the update bricked your phone and we are talking about unofficial updates
Sent from my GT540 using XDA App

gorantz said:
thanks, but my phone is now at service when I get it back maybe I'll try....but maybe
Click to expand...
Click to collapse
Dont hesitate to ask for help man its worth upgrading.
Sent from my GT540 using XDA App

I've got phone today from service (not official LG service), repairman just manage to wake up phone so I can turn it On, but when I turn it I get black screen with message on it ''download mode''. Now computer recognize phone when I plug it, and I tried to update or flash it with kdz updater but have no luck
I launch kdz in emergency mode, load rom with updater, press launch button, and process started, (get messages unpacking software etc.) but after 3-4 minutes I notice that computer is blocked I couldn't do anything with mouse pointer, and I waited 15 minutes but computer is still blocked, even time on computer is stopped. I tried this procedure few times, every time it is same. Also tried to disable lg virtual modem in device manager. Any idea what I could do ?
p.s. repairman in service told me that he tried it to flash it with riff box, process started but after few minutes if stopped and blocked his riff box

[Q]Dead phone after flashing

So, my friend gave me his LG GT540 to flash it with a new ROM but I kinda messed it up.
I followed the instructions from here:
http://forum.xda-developers.com/showpost.php?p=12898827&postcount=3
After flashing 2.3.7. with 'fastboot installer' the phone won't turn on anymore! I'm holding the power button but I just feel a little vibration and nothing happens.
What should I do?

I somehow managed to put the phone in download mode but KDZ Upgrader always stucks on the same point while flashing (20:41:54 : Smart : wParam = 205, lParam = 215).
Anyone?

gellow said:
I somehow managed to put the phone in download mode but KDZ Upgrader always stucks on the same point while flashing (20:41:54 : Smart : wParam = 205, lParam = 215).
Anyone?
Click to expand...
Click to collapse
you have installed msxml.msi?

cccb010 said:
you have installed msxml.msi?
Click to expand...
Click to collapse
Yes, I have.
Earlier today I managed to upgrade from 1.6 to 2.1 with KDZ. After that I flashed 2.3 with fastboot installer and after that the phone is dead.
Now I'm trying to flash it again to 2.1 with KDZ but it always stucks on that same point.

gellow said:
Yes, I have.
Earlier today I managed to upgrade from 1.6 to 2.1 with KDZ. After that I flashed 2.3 with fastboot installer and after that the phone is dead.
Now I'm trying to flash it again to 2.1 with KDZ but it always stucks on that same point.
Click to expand...
Click to collapse
Try using the original, non English version. This happened to me until I did that!
Sent from my LG GT540 Swift using Tapatalk

Do you have fastboot mode(blackscreen withback light) when you hold power and camera buttons on startup?

my friend had the same problem
he solved using fastboot on a pc with windows XP (he was on win7)

Got that problem, try differents KDZ, in cs_emergency and other computer!
Sent from my LG GT540 Swift using XDA App

Thanks guys, I will try with another PC/KDZ version. Where do I find this non-english version @liamwli was talking about?
bs828 said:
Do you have fastboot mode(blackscreen withback light) when you hold power and camera buttons on startup?
Click to expand...
Click to collapse
No, I can only get in the download mode with VOL DOWN + POWER, but to acomplish that I need to plug my phone several times in and out of my PC and at some point it finally says 'download mode' on my phone.

El version here http://forum.xda-developers.com/showthread.php?t=810271

bs828 said:
El version here http://forum.xda-developers.com/showthread.php?t=810271
Click to expand...
Click to collapse
Yes, I have that one. I would like a non-english, original version.
Tried to google it but no luck, just found some .kdz files

try using the stuff from here
http://forum.xda-developers.com/showthread.php?t=1224747
used it to flash my brothers phone from 1.6 no probs

ok first what operative system you have. Second try to find another computer to do the process again if after all this doesn't work:
* i assume you have Windows, download Ccleaner if you already don't have it to clean your computer.
*If your machine has more USB slots try them.
*Disable Internet
*Disable antivirus-Firewall (some can give problem, puts restrictions. I use avira and first time it blocked the KDZ application i had to re-install deactivate Avira antivirus and firewall to be able to flash.
*If you are going to flash with KDZ now do it under CS_emergency
So basically you have to clean your computer , install from scratch even the phone drivers(Mines works fine in Windows7 x32 and x64 bits), try with other USB slot (better the ones in the back not front in desktop PC).
Report back
*Dont use fastboot installer do it the old way then
*Don't upgrade directly to 2.3 do it step by step 2.1 to 2.2 then 2.2 to 2.3

I was on WinXP 32-bit and now switched to my laptop with Win7 64-bit.
Now I have a problem with drivers. When plugging in, windows is trying to install drivers for 3 devices:
-LGE Android Platform Composite Device - SUCCESFULLY
- 2 unknown devices - just says 'installing drivers' but no succes
I have installed all drives that were in that .zip just like on the first PC but this isn't working here.
I tried to flash anyway with KDZ, but it says that 'phone was not found' and after that just 'finished'.

i flash mine with win7 64bit no probs for drivers i just keep trying to let it update from windows update and they work

OK, I somehow managed to get the KDZ starting the software update on my laptop but just like on my PC earlier it stucks on the exaxt same line:
14:08:46: Smart :wParam= 205; iParam = 215
After that I hear the 'USB-plugging-in/out'- sound while windows is starting again searching for some drivers.
Since this is the same problem just like on the other PC i suppose something is seriously messed up with the phone and I should just bring it to the repair center.

help! my g2 only boots into fastboot

I was trying to install a custom recovery (twrp) by several different methods, with absolutely no luck (but that's another secondary issue at this point) and i screwed something up. Not exactly sure but i think the last thing I did was:
using "Rashr - Flash Tool" i think i went to "flash kernel from storage" then flashed boot.img.
now the phone goes immediately, directly into fastboot even without being connected to computer.
so i tried getting into the stock recovery by holding "volume down" and "power" until lg logo, releasing the reholding until factory reset screen. after choosing yes 2 times i get a
"boot certicification verify" or something message for about a second then it goes to this screen (sorry but apparently i haven't had enough posts on the forums to include clickable links.)
h**ps://drive.google.com/file/d/0BwQdFsCQ9KZVaGM1eWdJb25WVVU/view?usp=sharing

slplsnphx said:
I was trying to install a custom recovery (twrp) by several different methods, with absolutely no luck (but that's another secondary issue at this point) and i screwed something up. Not exactly sure but i think the last thing I did was:
using "Rashr - Flash Tool" i think i went to "flash kernel from storage" then flashed boot.img.
now the phone goes immediately, directly into fastboot even without being connected to computer.
so i tried getting into the stock recovery by holding "volume down" and "power" until lg logo, releasing the reholding until factory reset screen. after choosing yes 2 times i get a
"boot certicification verify" or something message for about a second then it goes to this screen (sorry but apparently i haven't had enough posts on the forums to include clickable links.)
h**ps://drive.google.com/file/d/0BwQdFsCQ9KZVaGM1eWdJb25WVVU/view?usp=sharing
Click to expand...
Click to collapse
if u still have acces to fastboot use this or u see many disk at windows use srktool http://forum.xda-developers.com/lg-g2/development/tools-srk-tool-useful-toos-lg-root-twrp-t3079076

amin44 said:
if u still have acces to fastboot use this or u see many disk at windows use srktool http://forum.xda-developers.com/lg-g2/development/tools-srk-tool-useful-toos-lg-root-twrp-t3079076
Click to expand...
Click to collapse
ok, i do have access to fastboot (actually, as soon as i power it on, it immediately is in foastboot mode, even without being connected to computer). i tried using srktool's repair tools via fastboot. it seems like it's working (ie phone shows that it receives command) but that's it. does it take a loooooong time or something?
btw, i can also get into download mode by holding "vol up" while plugging into computer. so, i tried using srktool utilites via download mode and nothing.
also, i just noticed that while connected to computer in download mode, in device manager it shows G2 under "portable devices" with an exclamation point on it.

slplsnphx said:
ok, i do have access to fastboot (actually, as soon as i power it on, it immediately is in foastboot mode, even without being connected to computer). i tried using srktool's repair tools via fastboot. it seems like it's working (ie phone shows that it receives command) but that's it. does it take a loooooong time or something?
btw, i can also get into download mode by holding "vol up" while plugging into computer. so, i tried using srktool utilites via download mode and nothing.
also, i just noticed that while connected to computer in download mode, in device manager it shows G2 under "portable devices" with an exclamation point on it.
Click to expand...
Click to collapse
are u sure u do not have franken phone open battery cover and see model written inside motherbord

amin44 said:
are u sure u do not have franken phone open battery cover and see model written inside motherbord
Click to expand...
Click to collapse
I haven't taken the back off (yet) but all indications are that it's an AT&T (D800).
What part of my description makes you think that it might be a franken phone?

Did you try connecting the phone in download mode or fastboot to the LG Mobile Support Tool and performing an upgrade recovery?

audit13 said:
Did you try connecting the phone in download mode or fastboot to the LG Mobile Support Tool and performing an upgrade recovery?
Click to expand...
Click to collapse
not sure what you mean by "lg mobile support tool". i googled it and found and installed "lg pc suite". is that the same thing?
nevermind that last question. i found and installed and tried the upgrade recovery tool but for some reason the phone wont go into download mode anymore. when i power it up whith ""vol +" help down, it shows download mode for a second, but then goes right into fastboot mode.

Is it recognized by the program in fastboot mode?
Here's the program I was referring to: http://www.lg.com/ca_en/support-mobile/lg-LGD803
Even though the program says it is for the 803, I used it to recover my international d802.

slplsnphx said:
not sure what you mean by "lg mobile support tool". i googled it and found and installed "lg pc suite". is that the same thing?
nevermind that last question. i found and installed and tried the upgrade recovery tool but for some reason the phone wont go into download mode anymore. when i power it up whith ""vol +" help down, it shows download mode for a second, but then goes right into fastboot mode.
Click to expand...
Click to collapse
http://forum.xda-developers.com/lg-g2/general/lg-g2-unbrickable-fix-real-hard-brick-t2904404

amin44 said:
http://forum.xda-developers.com/lg-g2/general/lg-g2-unbrickable-fix-real-hard-brick-t2904404
Click to expand...
Click to collapse
Thanks for the reply! But when I have phone connected to USB in fastboot, it shows up in device manager as "android device > USB modem phone port". Is that method the right fix for my situation?

ok, so likei said my phone is indeed in fastboot mode, connected to computer via usb (shows up in device manager as "android device > USB modem phone port". using srktool, i can send commands to the phone (command shows up on phone but thats it.....doesnt matter what command, it just sticks there until i unplug the phone then srktool shows the operation competed and phone shows
https://drive.google.com/file/d/0BwQdFsCQ9KZVSVg3OTZLcXV0N0E/view?usp=sharing
but none of operations actually complete on the phone.

slplsnphx said:
Thanks for the reply! But when I have phone connected to USB in fastboot, it shows up in device manager as "android device > USB modem phone port". Is that method the right fix for my situation?
Click to expand...
Click to collapse
that method fix for all situation

amin44 said:
that method fix for all situation
Click to expand...
Click to collapse
ok i shorted the capacitors, and eventually have gotten to where i can get into twrp. i assume that is serious progress, but what do i need to do next?

slplsnphx said:
ok i shorted the capacitors, and eventually have gotten to where i can get into twrp. i assume that is serious progress, but what do i need to do next?
Click to expand...
Click to collapse
flash stock ROM via download mode or flash custom ROM via twrp.
the first choice (stock ROM) is better

thanks for the responses!!
before i saw your reply, i flashed the stock .tot firmware and now i have my phone back.
but, before all this started, it was lollipop(5.0.2) and now it's Jellybean(4.2.2). i bought phone on ebay, so im assuming that it got lollipop via an ota update. so now i'm looking into flashing it back to lollipop. what's the easiest method to install stock lollipop?

Phone boots normally but can't enter Fastboot, no recovery.

Hi guys, I'm having a weird problem with my zenfone 5 (a501cg). I have searched a lot but still can't find out a proper solution So I post it here and try to provide as much information as possible so hopefully developers at xda can help me.
My phone is rooted and I'm currently using modded rom called "bazzrom pinaslang" in the forum. Recently I want to use another rom so I decide to use adb sideload again.
However, the problem occurs: using adb sideload only show "error" message". BUT Adb devices show the phone.
Then I decide to use adb reboot fastboot to enter fastboot. But the phone only show a usb icon, and using "fastboot devices" doesn't show the device anymore.
I try other way by enter recovery mode "adb reboot recovery". The phone show resting android with "no command" message. I also try hold power and press down volumn after that but nothing happend. I try anything with that "power" + "volumn" combo but nothing happend (or it just shutdowns the phone).
Also, using "power" + "up volumn" to enter Droid boot doesn't work.
Driver is install. In device manager it shows "Android composite adb interface".
The only good news is my phone still boots normally and I can use it. Please help me get back my fastboot so I can upgrade my phone to Lollipop and other modded ROM.
Thank you so much !!!!

techgeard said:
Hi guys, I'm having a weird problem with my zenfone 5 (a501cg). I have searched a lot but still can't find out a proper solution So I post it here and try to provide as much information as possible so hopefully developers at xda can help me.
My phone is rooted and I'm currently using modded rom called "bazzrom pinaslang" in the forum. Recently I want to use another rom so I decide to use adb sideload again.
However, the problem occurs: using adb sideload only show "error" message". BUT Adb devices show the phone.
Then I decide to use adb reboot fastboot to enter fastboot. But the phone only show a usb icon, and using "fastboot devices" doesn't show the device anymore.
I try other way by enter recovery mode "adb reboot recovery". The phone show resting android with "no command" message. I also try hold power and press down volumn after that but nothing happend. I try anything with that "power" + "volumn" combo but nothing happend (or it just shutdowns the phone).
Also, using "power" + "up volumn" to enter Droid boot doesn't work.
Driver is install. In device manager it shows "Android composite adb interface".
The only good news is my phone still boots normally and I can use it. Please help me get back my fastboot so I can upgrade my phone to Lollipop and other modded ROM.
Thank you so much !!!!
Click to expand...
Click to collapse
Hi,
Have you tried to boot into your system, enable USB debugging and run
Code:
adb reboot-bootloader
?

dgadelha said:
Hi,
Have you tried to boot into your system, enable USB debugging and run
Code:
adb reboot-bootloader
?
Click to expand...
Click to collapse
Hi dgadelha, thanks for your reply.
I have tried your suggestion before but phone only reboots and display usb icon. I also try power volumn combi like i did in my post but still nothing happened.
Usb debugging is enabled.
Techgeard.

techgeard said:
Hi dgadelha, thanks for your reply.
I have tried your suggestion before but phone only reboots and display usb icon. I also try power volumn combi like i did in my post but still nothing happened.
Usb debugging is enabled.
Techgeard.
Click to expand...
Click to collapse
In that case, follow the "Last resort" part of this guide http://www.asus.com/zentalk/forum.php?mod=viewthread&tid=33800
It will reinstall your fastboot when the USB icon appears

dgadelha said:
In that case, follow the "Last resort" part of this guide
It will reinstall your fastboot when the USB icon appears
Click to expand...
Click to collapse
Hi dgadelha,
I have seen your link before my post, but I still wonder because the "last resort" in the link is used for "bricked" phone or the one that doesn't start up or stuck in somewhere. My phone can still boot and use quite normal : ( except one thing that my sd card always unmounted in this Pinaslang modded rom.
TG.

UPDATE I decide to try xFSTK but my computer still recognizes the device as "adb..." . if I turn off developer mode it becomes "portable device" in Window Device Manager.
The xFSTK can't recognize any Cloverfieldplus. (it shows "CLOVERFIELDPLUS...: 0")
TG.

techgeard said:
Hi dgadelha,
I have seen your link before my post, but I still wonder because the "last resort" in the link is used for "bricked" phone or the one that doesn't start up or stuck in somewhere. My phone can still boot and use quite normal : ( except one thing that my sd card always unmounted in this Pinaslang modded rom.
TG.
Click to expand...
Click to collapse
Hi,
Because the last resort will use a hardware function (xFSTK way) to update your dnx, ifwi and fastboot images. This way you can restore your fastboot.
Thanks.
techgeard said:
UPDATE I decide to try xFSTK but my computer still recognizes the device as "adb..." . if I turn off developer mode it becomes "portable device" in Window Device Manager.
The xFSTK can't recognize any Cloverfieldplus. (it shows "CLOVERFIELDPLUS...: 0")
TG.
Click to expand...
Click to collapse
You must instal the drivers it mentioned.
Also it will appear as Cloverview when the USB logo appears
Thanks!

dgadelha said:
Hi,
Because the last resort will use a hardware function (xFSTK way) to update your dnx, ifwi and fastboot images. This way you can restore your fastboot.
Thanks.
You must instal the drivers it mentioned.
Also it will appear as Cloverview when the USB logo appears
Thanks!
Click to expand...
Click to collapse
Hi dgadelha,
After a while I can start the xFSTK and begin download. However, after some attempts it always say error. The same messages show up as below:
Code:
start
sending dner
writeoutpipe dner
writeoutpipe 0
write----> dner
windriver Error: 0x20000015, Timeour expired
LogError
Error Code:1 - Connection Error
Failed to start Dldr state matchine, aborting...
void CloverviewPlusDownloader::do_abort()
Abott
FAIL
.....

techgeard said:
Hi dgadelha,
After a while I can start the xFSTK and begin download. However, after some attempts it always say error. The same messages show up as below:
Click to expand...
Click to collapse
Hi techgeard,
Looks like it's a driver timeout.
Which OS are you using? I see they used Windows 7 or before on the tests.
Also you should try getting xFSTK developers (on SourceForge) to help about this issue.
Thanks.

dgadelha said:
Hi techgeard,
Looks like it's a driver timeout.
Which OS are you using? I see they used Windows 7 or before on the tests.
Also you should try getting xFSTK developers (on SourceForge) to help about this issue.
Thanks.
Click to expand...
Click to collapse
Iam using Win7x64. The same with the guy posting in the link.
TG.

Ultra Bricked Mi 9t

Hi !
I need your help please, my phone doesn't want to enter in fastboot mode.
* Black Screen 100%
* If I press power button after 4 or 5 seconds it does a vibration
* Power button + Volume Up (looks llike it turn off the phone)
* Power button + Volume Down (looks like it want to enter in fastboot mode)
When my phone is connected to the PC it is recognized as: Unknown USB Device ( Device Descriptor Request Failed )
Blue LED always turned on (once the phone is recognized as Unknown)
The first that I tought when I saw the message ( Unknown USB Device ) was... ok this phone is really hard bricked and is needing a Test Point.
I did the Test point and my phone still giving the same message.
I tried different USB ports and same problem. (USB ports are ok)
I didn't tried a different USB cable and it has higher probabilities that my USB could be damaged. because (Device Descriptor Failed) is a problem from faulty USB ports or Cable.
But my USB Cable looks like new and it was used few times... also I tried moving a bit the connectors to see if it does something but no.. nothing happened.
The USB Port from the phone is like new. (I opened the phone)
If you have experience with the message: "Unknown USB Device (Descriptor Request Failed)
Please give me some help !

Hi !
Looks like the real problem was from drivers. Finally I installed the K20 drivers from this site : https://gsmusbdriver.com/xiaomi-redmi-k20
Then I did the test point
1) I Pressed power button with the test point
2) I heard a vibration
3) I released the power button but I continued with the test point
4) Voila the drivers were installed correctly and now my phone is recognized as: " Qualcomm HS-USB QDLoader 9008 "
EDITED:
If you are experiencing in device manager: USB Device Unknown Descriptor Request Failed maybe could be faulty USB port or cable. In my case was the cable. Now is working perfectly everything with a new USB Cable.

Now I'm trying to flash the phone using " Mi Flash Tool "
I downloaded the stock rom from Xiaomi site.. By the way my phone is with bootloader locked and is not rooted.
I pressed Flash button and the program asked for EDL Authentication. "I Created a new account" Logged suscessfull and then:
"Error" Root Element is missing.
WTF? why xiaomi is asking me for a rooted phone??
Please Help, any Idea about what I'm doing wrong?

romeosantos said:
Now I'm trying to flash the phone using " Mi Flash Tool "
I downloaded the stock rom from Xiaomi site.. By the way my phone is with bootloader locked and is not rooted.
I pressed Flash button and the program asked for EDL Authentication. "I Created a new account" Logged suscessfull and then:
"Error" Root Element is missing.
WTF? why xiaomi is asking me for a rooted phone??
Please Help, any Idea about what I'm doing wrong?
Click to expand...
Click to collapse
I think EDL is a special account authorised by Xiaomi.
Enviado do meu Mi 9T através do Tapatalk

Yeah u need a EDL Flash and for that an EDL verified Account, which u can't get anymore from xiaomi ..
you have to find someone who are willing to do it for you. Usually you have to pay for it .. around $50.
or try this
https://forum.xda-developers.com/showpost.php?p=79004670&postcount=82

solved said:
Yeah u need a EDL Flash and for that an EDL verified Account, which u can't get anymore from xiaomi ..
you have to find someone who are willing to do it for you. Usually you have to pay for it .. around $50.
or try this
https://forum.xda-developers.com/showpost.php?p=79004670&postcount=82
Click to expand...
Click to collapse
I went to S-Unlock and they said "Service offline" do you know or somebody know from other site? or someone that can help me?

romeosantos said:
I went to S-Unlock and they said "Service offline" do you know or somebody know from other site? or someone that can help me?
Click to expand...
Click to collapse
Did you try this :
- Download the stock ROM from xiaomi website, no tools needed, just adb and fastboot installed
- Extract the rom to a folder and launch "flash_all.bat" with admin.
- If you encounter an issue try it with another OS (try this if you don't want to install another OS : https://forum.xda-developers.com/an.../live-iso-adb-fastboot-driver-issues-t3526755)
Tell us if it works.

Gimlouuuu said:
Did you try this :
- Download the stock ROM from xiaomi website, no tools needed, just adb and fastboot installed
- Extract the rom to a folder and launch "flash_all.bat" with admin.
- If you encounter an issue try it with another OS (try this if you don't want to install another OS : https://forum.xda-developers.com/an.../live-iso-adb-fastboot-driver-issues-t3526755)
Tell us if it works.
Click to expand...
Click to collapse
Good news? I think that my phone now is booting on Fastboot mode? I don´t know how but today it was recognized by the PC as:
MTP USB Device
Please help What I can do to flash my phone¿? it is fastboot mode right? in fastboot mode I can do flash without an account authenticated righT?
Im trying to use Mi Flash TOOL again and Im getting this message:
fed4e139]:info1:$for /F "tokens=2 delims=: " %i in ('fastboot -s fed4e139 getvar anti 2>&1 | findstr /r /c:"anti:"') do (set version=%i )
Im using the latest rom for the K20 global phone but dont know why it is stuck with that message and STATUS: Flashing but it doesnt do any progress.
What Can I do?? is ok MTP USB Device? is that the correct drivers to do a flash in fastboot mode??
Thanks guys!

romeosantos said:
Good news? I think that my phone now is booting on Fastboot mode? I don´t know how but today it was recognized by the PC as:
MTP USB Device
Please help What I can do to flash my phone¿? it is fastboot mode right? in fastboot mode I can do flash without an account authenticated righT?
Im trying to use Mi Flash TOOL again and Im getting this message:
fed4e139]:info1:$for /F "tokens=2 delims=: " %i in ('fastboot -s fed4e139 getvar anti 2>&1 | findstr /r /c:"anti:"') do (set version=%i )
Im using the latest rom for the K20 global phone but dont know why it is stuck with that message and STATUS: Flashing but it doesnt do any progress.
What Can I do?? is ok MTP USB Device? is that the correct drivers to do a flash in fastboot mode??
Thanks guys!
Click to expand...
Click to collapse
Does the phone display the fastboot logo? If it does, then you have to remove some lines from the flash_all.bat file. The first ones where it says something about getvar product.

you can fastboot and just push it in cmd if fastboot active. I bever use bat files, because its only 2 lines to flash

yaro666 said:
you can fastboot and just push it in cmd if fastboot active. I bever use bat files, because its only 2 lines to flash
Click to expand...
Click to collapse
This is what happened:
I was watching my phone recognized as MTP USB Device and I tought yeah! my luck is from my side! now will be possible to flash my pohne in fastboot mode !!
I tried a lot of times with FLASH TOOL and it never passed from:
fed4e139]:info1:$for /F "tokens=2 delims=: " %i in ('fastboot -s fed4e139 getvar anti 2>&1 | findstr /r /c:"anti:"') do (set version=%i )
then I tried in adb: "adb devices" but I never saw my device connected even with MTP USB Device driver activated in Device Manager.
so I tried anyway to use the flash_all.bat and same message received "getvar anti" bla bla..
I never deleted the lines about getvar from the file "flash_all.bat" because now my phone it is exactly as in the begin....
Now the PC doesn't want to recognize the phone... again the same ****.. " USB Device Unknown (Descriptor Request Failed) "
I did the test point and the same crap... the phone doesn't want to be recognized USB Unknown...
Come on... I can't believe it... I had decided to pay for the service flash with EDL authentication in the next week and now I can't even make it boot in EDL... exactly as in the begin I'm.... the phone it is with the same sympthoms.. :crying:
EDITED:
Now the Phone was recognized by the PC again as: MTP USB Device but with yellow sign..
I disconnected, reconnected the cable and nothing yellow sign.
I did the test point and boom Im back again into the same ****... USB UNknown (Descriptor Request Failed)
what the **** is happening?? Im not so sure how the phone can be recognized as MTP USB Device but i guess that it is fastboot mode. and that is what I want to try the solution from the first post of this threads.
or the second solution understand what I have to do to put the phone into EDL. Because I did a lot of times with sucess at the begin and now Im doing exactly the same and nothing. it doesnt want to work.
Looks like drivers problem?

romeosantos said:
This is what happened:
I was watching my phone recognized as MTP USB Device and I tought yeah! my luck is from my side! now will be possible to flash my pohne in fastboot mode !!
I tried a lot of times with FLASH TOOL and it never passed from:
fed4e139]:info1:$for /F "tokens=2 delims=: " %i in ('fastboot -s fed4e139 getvar anti 2>&1 | findstr /r /c:"anti:"') do (set version=%i )
then I tried in adb: "adb devices" but I never saw my device connected even with MTP USB Device driver activated in Device Manager.
so I tried anyway to use the flash_all.bat and same message received "getvar anti" bla bla..
I never deleted the lines about getvar from the file "flash_all.bat" because now my phone it is exactly as in the begin....
Now the PC doesn't want to recognize the phone... again the same ****.. " USB Device Unknown (Descriptor Request Failed) "
I did the test point and the same crap... the phone doesn't want to be recognized USB Unknown...
Come on... I can't believe it... I had decided to pay for the service flash with EDL authentication in the next week and now I can't even make it boot in EDL... exactly as in the begin I'm.... the phone it is with the same sympthoms.. :crying:
EDITED:
Now the Phone was recognized by the PC again as: MTP USB Device but with yellow sign..
I disconnected, reconnected the cable and nothing yellow sign.
I did the test point and boom Im back again into the same ****... USB UNknown (Descriptor Request Failed)
what the **** is happening?? Im not so sure how the phone can be recognized as MTP USB Device but i guess that it is fastboot mode. and that is what I want to try the solution from the first post of this threads.
or the second solution understand what I have to do to put the phone into EDL. Because I did a lot of times with sucess at the begin and now Im doing exactly the same and nothing. it doesnt want to work.
Looks like drivers problem?
Click to expand...
Click to collapse
Most likely. I had similar issues with a rn7. Try it on another pc. I had issues getting the phone recognized in w10, then I switched to an old laptop I had with w7. Didn't install drivers, didn't do anything, windows installed it's driver and the phone was there. So it may be a issue with your OS. And again, delete the first two lines from the flash_all.bat to get over that error.
Edit: The flashing with MiFlash tool will only work if you see the fastboot logo on your phone. If the phone is seen in cmd after you type "fastboot devices".

attitude12 said:
Most likely. I had similar issues with a rn7. Try it on another pc. I had issues getting the phone recognized in w10, then I switched to an old laptop I had with w7. Didn't install drivers, didn't do anything, windows installed it's driver and the phone was there. So it may be a issue with your OS. And again, delete the first two lines from the flash_all.bat to get over that error.
Edit: The flashing with MiFlash tool will only work if you see the fastboot logo on your phone. If the phone is seen in cmd after you type "fastboot devices".
Click to expand...
Click to collapse
Thanks for the answer, I have the notebook with two windows.
W10 64 bits and W7 32 Bits.
Same problem in both, don't know how can be driver problem, because I installed exactly the correct versión. (I know that is the correct because I could do the test point correctly two days ago) and it was recognized as: "Qualcomm HS-USB QDloader 9008 (COM4)" But today it doesnt want to recognize anymore the phone. Only "USB Device Unknown (Descriptor Request Failed)"
So hard is to make it boot in EDL mode? i saw the picture for test point (k20 xiaomi) and it is really easy. but PC recognize the phone as Unkonwn after test point. The first day that I did the test point happened the same ****.. I was hours and hours trying to make it work.. till I installed the correct drivers. and now is happening the same.. hours and hours trying to boot in EDL and using the same drivers, same process, but nothing.
Except at 3:00 pm dont know how the phone was recognized as MTP USB Device (with yellow sign error in device manager) so i did again the test point and boom.. USB Unknown again...
If I press Power button + volume up the phone looks like turn off and instantly I do the connection from usb cable and nothing appears in device manager but 2 mins or 3 mins later the phone is recognized as unknown and blue led light start to blink every 1 second.
If i do the test point it is recognized instantly as Unknown but there isnt any blue led light blinking.
I tried test point without battery and same. problem.. I tried to do the test point without release the pins so fast.. and same problem I tried releasing fast.. slow... etc
I tried to removed the battery and press power button to drain all the energy from board.
I tried to charging battery with power supply and the blue led light is turned on after 2 mins and it continue on over 10 or 15 mins then it is off the blue light. I used a tester to see the voltage from battery and is ok looks like it is full of charge.
If I do the EDL Cable could it be different? or is the same as test point?
Thanks for your help guys you are good people!

Have you tried with Linux? With the distribution I mentioned?

Gimlouuuu said:
Have you tried with Linux? With the distribution I mentioned?
Click to expand...
Click to collapse
Hi! Thanks for your help.
The problem was the usb cable. Now works perfectly with a new cable. But now I have to unbrick it hahaha

romeosantos said:
Hi! Thanks for your help.
The problem was the usb cable. Now works perfectly with a new cable. But now I have to unbrick it hahaha
Click to expand...
Click to collapse
great, good news. To unlock it, go back at my first message.

Gimlouuuu said:
great, good news. To unlock it, go back at my first message.
Click to expand...
Click to collapse
Hi! Thanks! Yes I tried to flash in fastboot mode. I did adb devices command and it was recognized ok.
But when I tried to flash_all.bat it gave me error: "bootloader locked" looks like I need the bootloader unlocked to flash via ADB in fastboot mode.
what I want to try is like a bug in xiaomi mi flash tool. The first time that I tried to use it. I made a new account and I received a message like:
"Logged Suscessfull"
"Your Account was blind to this PC. Now you can start the process"
Then I received an error like "no root permission" or something like that (maybe was because the usb cable was bad)
Looks like the xiaomi flash tool passed the EDL Authentication. because now each time that Im trying to use MI TOOL this is the message that Im getting.
"Logged Sucessfull"
You are not authorized for this operation

romeosantos said:
Hi! Thanks! Yes I tried to flash in fastboot mode. I did adb devices command and it was recognized ok.
But when I tried to flash_all.bat it gave me error: "bootloader locked" looks like I need the bootloader unlocked to flash via ADB in fastboot mode.
what I want to try is like a bug in xiaomi mi flash tool. The first time that I tried to use it. I made a new account and I received a message like:
"Logged Suscessfull"
"Your Account was blind to this PC. Now you can start the process"
Then I received an error like "no root permission" or something like that (maybe was because the usb cable was bad)
Looks like the xiaomi flash tool passed the EDL Authentication. because now each time that Im trying to use MI TOOL this is the message that Im getting.
"Logged Sucessfull"
You are not authorized for this operation
Click to expand...
Click to collapse
Ok, suddenly you can not reinstall via all these methods because your bootloader is locked... Have you tried asking a member here if anyone has an EDL account (a real haha) ?