please help me downgrade to v20a to v10a - LG Optimus Black

I just recently upgraded my OB into v20a gingerbread chinese rom.. after upgrade my computer cant recognize my phone as an android device. Therefore i cant root it. But in recovery mode my computer can detect it so i tried flashing v10a directly but failed.
All lg drivers and pc suite are already installed. Im using windows vista 32bit. I ke
ep getting this message from my pc: found new hardware cdc serial. Found new hardware B project. When usb debugging is on.
Please help me.
im new here and its my first post.
Thank you.

You need this kit. Put tour phone in download mode by pressing volume up while inserting usb (phone off). Then flash with KDZ updater.

I already did that.. i tried flashing v10a.nothing happened. Kdz stop responding. Is it possible to downgrade directly to v10a from v20a?
Thanks.

Try here . Hope it works. There are more combinations, but it will work.

it wont for me, i did everything they did on that forum, downloaded everthing but the R&D test tool just wont work on my PC. i cant press anything. only the box saying merge 250-390 mb files.
i did turn windows enabler on and off.
Do you know where i can download the v10a ROM in fls and bin format? im going to use smartflash tool instead.
thank you so much.
EDIT:
PROBLEM SOLVED
THANKS FOR HELPING MAN.

deckardcain said:
it wont for me, i did everything they did on that forum, downloaded everthing but the R&D test tool just wont work on my PC. i cant press anything. only the box saying merge 250-390 mb files.
i did turn windows enabler on and off.
Do you know where i can download the v10a ROM in fls and bin format? im going to use smartflash tool instead.
thank you so much.
EDIT:
PROBLEM SOLVED
THANKS FOR HELPING MAN.
Click to expand...
Click to collapse
http://media.xda-developers.com/images/smilies/confused.gif
I have the same problem. How did you do to get it solved?

I used a 64bit computer. Installed all the LG drivers. And used the R&D test tool.

Related

Bricked LG Optimus 2x after a nandroid backup

Hello guys!
Sorry for my english... I'm still learnig... So... After I did this tutorial http://forum.xda-developers.com/showthread.php?t=1856090
Another recovery mode version has been installed (touch). after that I did a full wipe because i wouldnt any more dual boot and I installed wiui rom. I did titanium restore backup and other configs and everything was fine. Entered in rom manager and I choose backup rom. Backup was done sucesfully. after that my lg optimus 2x died it couldnt reboot and now it cant boot, the screen is black and blank.I've tried all stuffs I could read on internet but the only thing I could was install apx drivers but when I start "flash.bat" to restore stock rom, the last line in cmd show me "waiting for bootloader to initializer"
is my phone bricked forever??
If there is a solution I would be grateful!!!
Sorry for something that was no clear to you guys!
Is not bricked search for Smartflash or Nvflash.
dorwoo said:
Is not bricked search for Smartflash or Nvflash.
Click to expand...
Click to collapse
I've already did that but I'm stocked at "waiting for bootloader to initializer" with nvflash (2x-v10b-1300166062-nvflash) here: http://www.modaco.com/topic/335416-nvflash-setup-instructions-drivers-links-active/
and here: http://forum.xda-developers.com/showthread.php?t=1007825
With smartflash i can set .fls and .bin files but the application cant recognize LG O2X. I pull out battery, vol - / + pressed and I plugged to USB.
I've already tried this methods: smartflash, 2x-v10b-1300166062-nvflash (flash.bat), One-Click-G2x-recovery-flasher-04-28-12 (it was at O2X thread in another forum).
Thanks a lot. I have HOPE!!!!
Bricked
For those people who said the LG O2X DO NOT Bricked, Here is my thread! My LG does not turn on even the devil came here now!!! :fingers-crossed: I requested lg warranty today because no one of the methods in internet (nvflash, smartflash, one click recovery e etc etc etc) served for me. So... I cant stand LG anymore... Good bye LG!
Thanks guys for the help and the hope!!
I think u did not do it properly...i had mine in same condition and i was able to recover with smartflash.
dorwoo said:
I think u did not do it properly...i had mine in same condition and i was able to recover with smartflash.
Click to expand...
Click to collapse
Thx for reply! tell me how did u do it at steps? If LG doesnt repair my device I will try fix it by my self!
Thx a lot! In both methods any picture or word or something like upgrade s/w, show on screen of my O2X. I've tried these methods and nothing. My device was connected to the USB with nvflash all night and menssage "waiting for bootloader to initialize" persisted. Nothing happened.
Help me if u can!
I will be greatfull with you my friend.
I'm not a totaly noob! And I read as I can to learning more and more about android OS.
Again, Thanks!
I did what says here: http://android.stackexchange.com/qu...-lg-optimus-2x-p990-back-to-stock-lg-software
I had problems on my pc because of drivers i think and smartflash didnt worked but i managed to do it on other pc.U should be able to do it if u follow the steps but if u get errors with smartflash try reinstalling drivers or with other pc.

Easy Root Official V30A

I realize root for V30A, (no data wipe and original bootloader)
- Download it -> http://www.multiupload.nl/3NOTPXFDSB
- Connect to pc Optimus 2X in APK MODE (Nvflash mode: no battery and volume "+" and "-" pressed)
- Start Flash.bat and please wait.
- At the end, Optimus 2X V30a is rooted, Enjoy
Thanks, if I can update my phone via update tool gonna try this.
frikou said:
Thanks, if I can update my phone via update tool gonna try this.
Click to expand...
Click to collapse
donwload kdz and flash it or.. extract smartflash file ! It is very easy to upgrade
gabrielecif said:
I realize root for V30A, (no data wipe and original bootloader)
- Download it -> http://www.multiupload.nl/3NOTPXFDSB
- Connect to pc Optimus 2X in APK MODE (Nvflash mode: no battery and volume "+" and "-" pressed)
- Start Flash.bat and please wait.
- At the end, Optimus 2X V30a is rooted, Enjoy
Click to expand...
Click to collapse
Thanks a lot! ATM, downloading V30A. Have slow connection so will take huge time. Meanwhile can someone confirm this root mod? Anyone tried? Is root perfect?
cmahendra said:
Thanks a lot! ATM, downloading V30A. Have slow connection so will take huge time. Meanwhile can someone confirm this root mod? Anyone tried? Is root perfect?
Click to expand...
Click to collapse
Root work perfect
file is removed?
no any file removed
Does this rom include cwm and bootloader unlock? Thanks.
I'm getting a load of stuff asking me to install Ilivid. But no download. Have I missed something??
tophelecool said:
I'm getting a load of stuff asking me to install Ilivid. But no download. Have I missed something??
Click to expand...
Click to collapse
direct download from multiupload !
I have done the root with nvflash.. but on the monitor there is "s/w upgrade please wait while upgrading" .... i'm waiting 1 hour... (sorry for my english)..help me
kekko4ever said:
I have done the root with nvflash.. but on the monitor there is "s/w upgrade please wait while upgrading" .... i'm waiting 1 hour... (sorry for my english)..help me
Click to expand...
Click to collapse
Are you going in S/W upgrade mode for NVFlash? Thats wrong. You have to to in APX mode for NVFlash. SW Upgrade mode is for SmartFlash, not applicable here.
Check my current signature to find how to go in APX mode and install APX drivers. Screen is blank(looks like switched off) when you go in APX mode.
---------- Post added at 02:55 AM ---------- Previous post was at 02:52 AM ----------
gabrielecif said:
Root work perfect
Click to expand...
Click to collapse
thanks for confirmation. will try later.
cmahendra said:
Are you going in S/W upgrade mode for NVFlash? Thats wrong. You have to to in APX mode for NVFlash. SW Upgrade mode is for SmartFlash, not applicable here.
No. i have use apx mode.. anyway i disconnected the phone.. seems to work.. now the problem is account google.. if i used the browser i log in.. if use the account google of the phone or play store not work..
Click to expand...
Click to collapse
do a factory reset ! in my phone.. no problem !
I solved it was the time and date that did not make me access -.-
perfect ! incorrect date non allow to work play store
kekko4ever said:
I solved it was the time and date that did not make me access -.-
Click to expand...
Click to collapse
and another mistery????
how come you can post in dev section with only 3 posts?
look at his date of join.It is hard to believe his no. of posts in that amount of time.
Confirmed working.
Side info: had problems with recovery driver , I needed to reinstall drivers and then when connected to pc I needed to run true all the usb connection options like , charging only , mass storage , tethering ,... this way it started to install all different drivers.
I received ICS update today when connecting to the LG update tool , it said a update was available and warned me to remove external SD while it was going to update to ICS.
Removed the external and started the update , (V30a android 4.0.4 was what I received) , Then I reconnected the phone and it installed PC sync for ICS and blablabla.....
I gotta say it is really smooth.
Anyone could say how long to wait until its save to stop the Nvflash?
Its now over 1-2 hour and seems not to happen anything anymore.
And i did that nvflashing often before. The driver is the same as last time.
No problems in device manager. Its an XP Laptop without any Antivirus or Firewall.
I had the latest rooted nvflash version on my LG P990 before that.
In the CMD window it tells only Nvflash started and the Display shows:
"S/W Upgrade Please wait while upgrading".
Never had that before and i am a bit nervous to kill it
But i think i read somewhere i can do it again also if i stoped it.
---edit---
Ok i stoped and redid it. Also made wipe with cwm.
But this flash isnt working for me.
I get:
"failed executing command 14 NvError 0x120000
command failure: partition download failed"
I tryed to give it an external SD, full wipe and cache wipe. Nothing.
Error stay BUT only with this flash offert here.
I had a backup flash of 20L and that could be flashed without any problem.
I had adroid 2.3.4
1035.21_20110725
kernel 2.6.32.5
===FINAL EDIT===
Going back to official 2.2.2 changed nothing! This "easy way didnt work for my P990
Solution:
Smartflash worked fine!
http://forum.xda-developers.com/showthread.php?t=2028946
Bin+FLS flash
Rooting
As mentioned Solution 1 here didnt work at all. Cant say why.
I tryed really a lot and spent to much time on that topic.
Wasnt as easy as before on 2.x.x...and none of the 3 Solutions worked for me!
But a combination works fine.
The Solution 3 didnt work for me.
"=3= (thanks to joiN85)" didnt work...got a boot loop ((
Solution 2 "=2= (thanks to RobYyY)" worked half...
but i had to use the "Superuser-3.1.3-arm-signed-tradotto.zip"
on an external sd and not the SuperSU Root.zip.
Finally a hint that i is very important:
Dont forget to set the correct Date and Time or google will
Display a connection error.
Great work and sooooo fast... I wanne say thank you for everyone
who made it possible. Good work!

[Q] Problems with recognizing

Please help me. I wanted to put cynogen mode on my LG 4X, and something went wrong. Now when I start the phone shows me the logo of LG and writes under, security error Morning Call is empty ... and now when I try to connect the phone to a computer , my computer is not show me LG like LG P880, than as a device unreconized device .. does anyone know how to fix my LG?
croluka4789 said:
Please help me. I wanted to put cynogen mode on my LG 4X, and something went wrong. Now when I start the phone shows me the logo of LG and writes under, security error Morning Call is empty ... and now when I try to connect the phone to a computer , my computer is not show me LG like LG P880, than as a device unreconized device .. does anyone know how to fix my LG?
Click to expand...
Click to collapse
Check if you have the latest drivers, connect the phone in recovery (vol- and connect to PC), flash with LGFlash Tool.
RuedasLocas said:
Check if you have the latest drivers, connect the phone in recovery (vol- and connect to PC), flash with LGFlash Tool.
Click to expand...
Click to collapse
I cant flash my LG with LG Flash because tihs program dont reconized my phone.. "Phone is not found"
croluka4789 said:
I cant flash my LG with LG Flash because tihs program dont reconized my phone.. "Phone is not found"
Click to expand...
Click to collapse
palalos81 said:
hi. i woould like to downgrade from v20a to v10h and the lgflashtool doesn't work.some times stuck on ready and some others on 10%i have tried almost everything from installing the drivers once more until change pc and ports.is there any option to downgrade with another way?
Click to expand...
Click to collapse
There is no other way...
Did you follow the tutorial? Did you remained calm and gave time for windows recognise your device?
Did you uninstall and re-install the drivers? You're able to reboot in SW mode (vol- pressed while connecting to PC)?
Here you have all files needed:
http://forum.xda-developers.com/showpost.php?p=38838927&postcount=7
Delete your old files, download new ones and follow the tutorial.
Remember to remain calm and give time to system recognise and install everything needed.
Good luck :fingers-crossed:
RuedasLocas said:
There is no other way...
Did you follow the tutorial? Did you remained calm and gave time for windows recognise your device?
Did you uninstall and re-install the drivers? You're able to reboot in SW mode (vol- pressed while connecting to PC)?
Here you have all files needed:
http://forum.xda-developers.com/showpost.php?p=38838927&postcount=7
Delete your old files, download new ones and follow the tutorial.
Remember to remain calm and give time to system recognise and install everything needed.
Good luck :fingers-crossed:
Click to expand...
Click to collapse
TNQ...I fix my LG...and know work perfect I put 20A kdz. 4.1.2. and phone work perfect
Same problem here
I have the same problem. I think the stupid thing I did was to install V20a without rooting the phone. Now I cant root it. IS11LG_SystemBackupTest.signed.ap would not run and when I try to recover either with LGflashboot or LG firmware recovery I get the same error message "morning call is empty" (very strange error message). I can go back to v20a but since I am not completely happy with it I would like to resolve it. Is there any chance to fix it? I am not very confident to format bootload or installing custom ROM.
Thanks
sgiedrius said:
I have the same problem. I think the stupid thing I did was to install V20a without rooting the phone. Now I cant root it. IS11LG_SystemBackupTest.signed.ap would not run and when I try to recover either with LGflashboot or LG firmware recovery I get the same error message "morning call is empty" (very strange error message). I can go back to v20a but since I am not completely happy with it I would like to resolve it. Is there any chance to fix it? I am not very confident to format bootload or installing custom ROM.
Thanks
Click to expand...
Click to collapse
You cannot root the phone on V20a using IS11LG_SystemBackupTest.signed.apk, since that file is used for versions V10x. Check out this link for rooting V20a: http://forum.xda-developers.com/showthread.php?t=2180688
croluka4789 said:
Please help me. I wanted to put cynogen mode on my LG 4X, and something went wrong. Now when I start the phone shows me the logo of LG and writes under, security error Morning Call is empty ... and now when I try to connect the phone to a computer , my computer is not show me LG like LG P880, than as a device unreconized device .. does anyone know how to fix my LG?
Click to expand...
Click to collapse
Same problem here!
xavierleonelbr said:
Same problem here!
Click to expand...
Click to collapse
Uninstall all drivers and folders like "LG United Mobile Driver" and "LG USB Modem Driver".
Re-install the drivers:
http://www.4shared.com/file/rPpP2btT/LGUnitedMobileDriver_S4981MAN3.html
http://www.4shared.com/file/ZSMf2x6n/LGUSBModemDriver_Eng_WHQL_Ver_.html
Take out the battery, press "Power Button" (just to discharge all phone components), put the battery back on the phone.
Press "Vol-" and connect to PC. Wait while windows detect the device and search in windows update for possible new drivers.
Windows won't find a thing but will take some time while trying...
After that you should be OK.
Just did similar to my phone and followed the advice in this thread - now sorted. Thanks guys you rock!
if u epic fail to manually force the drivers in just install android jdk open it and update it.
croluka4789 said:
Please help me. I wanted to put cynogen mode on my LG 4X, and something went wrong. Now when I start the phone shows me the logo of LG and writes under, security error Morning Call is empty ... and now when I try to connect the phone to a computer , my computer is not show me LG like LG P880, than as a device unreconized device .. does anyone know how to fix my LG?
Click to expand...
Click to collapse
I had the same problem, after running several recovery procedures and kdz files, I finally was able to restore the phone to it's original ICS rom.
Download the files in the description and follow up the video.
http: www youtube com watch?v=12v5A3pArJQ
hope it helps.

[Q] Stuck at S/W Upgrade

Hello.
I'm stuck at S/W Upgrade mode. I treid to flash .dz file wuth LG Flash Tool, tried also flashing KDZ and recovering original ROM with LG PC Suite. Can you help me? What should I do to make my P880 working. Recently I've lost IMEI in my P880 and so this mess started...
tomkasz said:
Hello.
I'm stuck at S/W Upgrade mode. I treid to flash .dz file wuth LG Flash Tool, tried also flashing KDZ and recovering original ROM with LG PC Suite. Can you help me? What should I do to make my P880 working. Recently I've lost IMEI in my P880 and so this mess started...
Click to expand...
Click to collapse
Your only chance is (in my view) to restore backup, if you have any, from an external device only then you can get your IMEI back. Otherwise look for a thread with same problem where someone posted some options.
Good luck.
Same thread. A little search would've helped: http://forum.xda-developers.com/showthread.php?t=2786001
Sent from my LG-P880 using XDA Premium 4 mobile app
Use original usb cable
Doesn't work on Windows 8 I had the same issue, but on my old Vista laptop s/w worked perfectly
Already tried with several USB cables on Win7 and WinXP without success :/

Help, Hardbrick LG L90

Hello guys, i'm new here. First of all english is not my native language so sorry if i make any mystakes.
I flashed my phone to Lollipop. Then i tried to install twrp (with Flashify) recovery so then i could install Xposed... but the thing is that i may have used the wrong file..
My phone doesn't start. The only sign of live that it gives is when i plugged it to the PC, the pc makes the usual sound when you plug a USB. And it shows my phone as a usb with 63MB of storage (obviouly my phone has more storage). And when i go to Disk admin it shows me all the partitios that my phone has.
Also in Devices admin it shows my phone as: LGE AndroidNet USB Serial Port (COM6)
Do you know what can i do to unbrick my phone? :crying::crying:
LG D410H with lollipop 5.0
Did you unlocked the bootloader before flashing twrp?
Did you tried to hold vol + and plug USB cable to enter in download mode?
F. Gacrux said:
Did you unlocked the bootloader before flashing twrp?
Did you tried to hold vol + and plug USB cable to enter in download mode?
Click to expand...
Click to collapse
Hello, thanks for your reply.
Yes i have tried that already. Nothing seems to work :crying:
When i tried Volume up and plug the cable it shows nothing in my phone's screen. Just in my PC i sounds like a disconected or connected device
You probably flashed the wrong bootloader, which is a fatal error.
I know users that managed to recover other phones from this brick with LGBoardDiag as explained in this topic: http://forum.xda-developers.com/lg-g2/general/fix-unbrick-lg-g2-stuck-qualcomm-hs-usb-t2933830
I don't know how to get this TOT file, but the same partitions shown can be retrieved from your KDZ in BIN extension with LGFirmwareExtract, I think it's just a matter of renaming the files.
F. Gacrux said:
You probably flashed the wrong bootloader, which is a fatal error.
I know users that managed to recover other phones from this brick with LGBoardDiag as explained in this topic: http://forum.xda-developers.com/lg-g2/general/fix-unbrick-lg-g2-stuck-qualcomm-hs-usb-t2933830
I don't know how to get this TOT file, but the same partitions shown can be retrieved from your KDZ in BIN extension with LGFirmwareExtract, I think it's just a matter of renaming the files.
Click to expand...
Click to collapse
http://forum.xda-developers.com/lg-l90/help/bootstack-flash-gone-wrong-t3120536
i have this problem exactly the same
I found this interesting topic, you probably can recover from this brick to allow you to enter in download mode using LGFlashTool (not the one that flashes KDZ) like this: http://forum.xda-developers.com/showthread.php?t=2475045
But we still need this TOT file and the DLL for your D410H that I do not know where to find or to create from the KDZ.
F. Gacrux said:
I found this interesting topic, you probably can recover from this brick to allow you to enter in download mode using LGFlashTool (not the one that flashes KDZ) like this: http://forum.xda-developers.com/showthread.php?t=2475045
But we still need this TOT file and the DLL for your D410H that I do not know where to find or to create from the KDZ.
Click to expand...
Click to collapse
But i can't go download modde :/ my phone does not show anything on it's screen..
i've been trying with this post:
http://forum.xda-developers.com/lg-g2/general/tool-unbrick-lg-g2-qualcomm-9008-board-t3072073
but it gives me the error that appears at the beggining of the thread. I unplugged it, remove battery, then put it back again and reconnect the usb, but the same problem :/ :crying:
also i have found not the TOT file but this thread:
http://forum.xda-developers.com/lg-l90/general/guide-unbrick-hard-bricked-l90-variants-t3173429
I meant that will lead you to a working download mode, which is enough to restore everything, including partition table.
I have a suggestion, you said Windows detects as a mass storage unit, can you boot Linux and follow this thread http://forum.xda-developers.com/showthread.php?t=2582142 to see if can see all the partitions?
If yes, it's just a matter of extracting the KDZ of your variant and flashing the said partitions to get a working download mode to make a complete kdz flash.
lg l90 405 is believed to be 410 dual sim
hi to all guys, I would like to submit for your ATTENTION What I And Success Knowing and possibly come to restore rate.
I am the owner of an LG L90 model d405n, Wanting to make the Unlock bootloader I used an Application That I would have to just unlock the bootloader and recovery modified Install A.
In the cell AFTER tale reality 'hack And practically dead, he would not turn on even.
I Put in search tool various programs and various vain, the cell showed no signs of life.
Then, Dandolo now hope for him I tried to go for broke, I formatted a low debits and then with an Application (umbrick) I managed to flesciare start and everything else. Now the cell was lit and was anche in update download mode '.
I downloaded the firmware 405 and KDZ I Tried to use the flash tool but the procedure is always blocked at 2% giving an error.
With the instrument of 'LG I discovered sensationally That cell was identified coming D410, exhausted from the various prove not go into port I wanted to download the KDZ model 410D and, come by magic, flash tool worked! I installed the latest version information and cellphone works beautifully!
So now I have a phone with a firmware His (among other things the 410D E anche dual sim).
I would like to restore your system orifginale, That the 405 but I'm afraid to rate other trouble ....
I hope someone can give me a hand ...
LG L90 D410 Totally bricked. Please someone help.
I an LG L90 D410. I tried to install boot loader and after rebooting the phone, it was unusable. It is not showing any QhSUB_BUlk as well as any partition in My Computer. its not showing anything in PC. Please help someone how can i unbrick my phone.
Hello please try to follow this thread http://forum.xda-developers.com/lg-l90/general/guide-unbrick-hard-bricked-l90-variants-t3173429
This works 100% it helped me unbrick my phone. Hope it will work for you as well
Enviado desde mi LG-D410 usando XDA Forums

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