Develop Bugs

[how to] flash LG KS20 with new rom, all included

Do at your own risk! Be carefull!
What you need:
LGMDP aplication - http://rapidshare.de/files/38526282/LGMDP_1_1_.5_Build_12.10_Release.zip.html
LG usb driver - http://rapidshare.com/files/99459712/LGCoronaUSBDriver.rar
edit: ok huge thanks to arash and the new!!
ROM
finally english rom!!
http://forum.xda-developers.com/showpost.php?p=2375120&postcount=51
-for other language see
http://forum.gsmhosting.com/vbb/showthread.php?t=499173
and more recent roms (thanks to ChuckyIT)
http://forum.gsmhosting.com/vbb/showthread.php?t=513378
How to:
-instal driver and application.
At device:
-enter this code to dialpad: 2676625720#
-engeneering menu will show.
-press:
Port Setting → 1. Diag Setting → 1. USB Set for Diag → “OK” → “Back”.
(Port Setting → 1. Diag Setting →) 2. USB Switching → “LG Composite -DUN, DIAG”.
-press Done and reset your device.
this sets your usb port as a composite usb port.
-Connect device at usb port and run application.
-click at "Select port" - dialog will appear, check if state is "Enable" otherwise there is something wrong with your connection. Hit connect.
-dialog will appear where you can select which parts of rom you want to flash, navigate by browse button to desired parts.
-click start, confirmation dialog will appear select yes/no
-dialog will appear if you want backup nv data, do that! or you will have troubles!!!,
backup nv2 with lgmdp when phone is on
-phone then will go to emergency mode and start download rom parts from pc to your phone, if everything goes well you will see "Download complete" at corner of diag box, reset your phone and enjoy new rom
trubleshooting
[Fix] LGMDP shows "no phone" when connecting to KS20
if you have a problem with connecting phone to PC
http://forum.xda-developers.com/showthread.php?p=2248729
-if something fails dont panic, you can boot device in emergency mode and try to reflash again.
emergency mode: make sure usb is pluged, turn off device and press "send" and "browser" button
-it's highly recomended to not keep your personal settings - set NV backup/restore to "Reset database & Contents"
-hardreset before flash is good choice
More information shoul be found in service manual
http://rapidshare.de/files/38526183/EN_KS20_SVC_ENG_1123_1.0_.pdf.html
If you want to help with making .dz flash file from rom dump, extracting .dz or so.. see this thread
http://forum.xda-developers.com/showthread.php?t=399249
Usefull:
[How To] Flash Unbranded English rom in Branded LG KS20 + ROM download
http://forum.xda-developers.com/showthread.php?t=405945
LG KS20 IMEI Change and BT address tutorial
http://forum.xda-developers.com/showpost.php?p=2354610&postcount=362
How to hardreset LG KS20
http://forum.xda-developers.com/showpost.php?p=2354864&postcount=363
How to dump LG KS20 rom
http://forum.xda-developers.com/showthread.php?p=2363003#post2363003

ANyone found an english ROM yet?
Anyway to make an english ROM from the french one replacing the relevant CAB files like in this guide?
http://forum.xda-developers.com/showthread.php?p=1302845&posted=1#post1302845
cheers
Jamie

LG usb driver - http://rapidshare.de/files/38526096/..._1_.7.zip.html
edit: ok this is not right driver, for that LG KS20 USB modem driver is needed
Are these now the drivers to flash the LG KS20 and can i make a backup of my old rom?
Did you successfully flashed a new rom this way?

john_locke said:
LG usb driver - http://rapidshare.de/files/38526096/..._1_.7.zip.html
edit: ok this is not right driver, for that LG KS20 USB modem driver is needed
Are these now the drivers to flash the LG KS20 and can i make a backup of my old rom?
Did you successfully flashed a new rom this way?
Click to expand...
Click to collapse
As far as I know there is no KS20 usb driver at this time, but it is only matter of time when somebody get one (I hope)
So answer to your second question is no - unless somebody found this drivers.
As you can see this is very different way to reflash devices from htc solutions.. We must be patient.

well, let's then hope someone founds these drivers. I've searched the internet, but no luck......I've looked in the service manual which is really great with so much infos about the KS20 and there it is written that you definetaly need the KS20 USB Driver and not the normal LG USB Driver.

Hello,
has someone found the required lg usb driver for flashing the ks20?
And what about the advantages of a newer rom?
My device has a rom version 10b. The rom posted in another forum is version 10e. What are your rom versions? I'm especially interested in a bug fix for the directdraw problems for which the most nice applications do not work. (PointUI and so on). It would be interesting to know if there's someone who has a newer device where this problem would be fixed??

+1 on the directdraw bug.
Another question is wheather the flashed device will be branded or not.I suppose it really depends on the rom one uses to flash it.In Greece there is atm only a Vodafone branded device available and I would love to unbrand it using a rom from LG Greece.

ks20 driver
hi,
someone has found the correct driver? i really want to flash it with a lite rom

Maybe it is bossible to make some physikal adapter to connect it to COM-Port?Or use the Bluetooth COM-Port?

where to look for the ks20 usb modem drivers?
Hey guys I think the consensus is that all we still need is the usb modem drivers, where would we find them? From an LG service centre? Who do we all have to sleep with ?
I will have another read of the service manual but whoever found that surely would have the contact for the usb drivers?
b

boysana said:
Hey guys I think the consensus is that all we still need is the usb modem drivers, where would we find them? From an LG service centre? Who do we all have to sleep with ?
I will have another read of the service manual but whoever found that surely would have the contact for the usb drivers?
b
Click to expand...
Click to collapse
LG service centre have NOT this Flash Driver too !
WBR !

This is so ridiculous
This 10B ROM version has so many bugs and LG is not possible to deliver a fresh new rom with the tools/drivers so we can update our device.
My ROM version is from Oct-07

I have rom v09d dated 2008-01-09 with 5.2.1626 (build 18132.0.4.6) but I think all the roms are the same, no matter on rom version..

i don't think all roms are same. Depending on the localisation. You have 09D from czech i believe. Germans have 10B, but there is 10E version out for german devices.

john_locke said:
i don't think all roms are same. Depending on the localisation. You have 09D from czech i believe. Germans have 10B, but there is 10E version out for german devices.
Click to expand...
Click to collapse
So if you took a german KS20 into a german LG service center could they reflash and upgrade the ROM??????????????????????????????

There is a new rom named v10F since february , nobody have still extract it but some details here: http://www.forummobiles.com/index.php?showtopic=163526&st=0

Dussel

it looks like my tutorial translated by google )

yasmeene said:
it looks like my tutorial translated by google )
Click to expand...
Click to collapse
For sure
And Flash drver still need.

a few guys (from france) allready have a new ROM ..... the 10f ROM version which fixed the GAPI bug (Point UI is working now) and it seems to be faster & more stable
http://translate.google.com/translate?u=http%3A%2F%2Fwww.forummobiles.com%2Findex.php%3Fshowtopic%3D163526%26st%3D0&langpair=fr%7Cen&hl=de&ie=UTF8
translated via Google translator to english.
EDIT : I see there is the link above......well this one is translated

[LG KS20] "Unavailable OTP Block" solution

Hello everybody!
I have read lost of post regaring KS20 flashing procedure.
Most common is to:
1) backup NV2 with LGMDP
2) flash phone with desired ROM erasing EFS
3) restore NV2 settings
The only problem is that after restoring NV2 the phone says "Illegal use" and "Unavailable OTP Block" message appears on the screen, so the phone becomes unusable... :-(
We all should backup NV2 with QPST Service Programming instead of LGMDP.
However if you have a NV2 backup done with LGMDP only there is a solution
1) Flash with any ROM that does not cause "Unavailable OTP Block" error erasing EFS
2) Restore NV2 with LGMDP, but do not restart the phone!
3) Backup NV2 with QPST Service Programming to QCN file
4) Flash with the ROM of your choice erasing EFS
7) Restore NV2 with QPST Service Programming from QCN file
And that is all!
Of course you have to switch USB settings with Engineering Menu after every flashing.

but i am now not able to connect with the computer,
what can i do?

In that case you should use Emergency Mode
Turn on device while pressing Send and Internet buttons.
A green LED will light.

yes it is done.
i found out i can only flash with chinese rom, but i really want an english one.
(my ks is bought in hk with chinese version)
can you advice me how to flash with english rom?

Well, you should be able to flash ANY ROM using one of those flash tools mentioned above.
I had Polish unbranded ROM and I checked several branded ROM-s like French, German, Polish and finally English (HKE).
If you are able to turn on your phone in emergency mode you should be able to flash it, and it does not metter what ROM do you use. The problem might be in ROM format. Do you have a standalone MZ file or flash.bin with additional files?

Try the branded ROM and pray.

When i turn on device while pressing Send and Internet buttons.
it didn't show a green LED light and didn't go to emergency Mode!
what should i do?? help...

1. Disconnect from USB
2. Press Send and Internet buttons and hold
3. Press Power On while you r still holding Send and Internet buttons
4. Then u should see a green led on, and ady to connect USB

hi cleverguy, after read your methods, I am really confused.
could you please tell the method to resolve "unavailable otp block" more clearly?
ps:could you release your MSN or mail address for me to contact with you?
Thanks a lot.

Visit my post pls
http://forum.xda-developers.com/showthread.php?t=405945
For OTP block result after flashing, there are two reasons:
1. You didn't check the "Erase EFS" option for flashing
2. Unbranded phone flashed with Branded or Hybrid rom, OR Branded phone flashed with Unbranded rom
So, in order to eliminate the occurrence of Reason 1., you must flash with "Erase EFS" option, if there after still coz you OTP Block or illegal use then it would be due to Reason 2, try flash with another rom

KS20 unavailable otp block
Hi Ray, the second you said caused my problem.
My phone is SFR French.
After read your post I have to raise a question: if I still want to flash a unbranded rom, how to solve the "unavailable otp block"? Do you have any advise? Thanks!

SFR French = Branded KS20
I think i have stated very clear in my post with the title "[How To] Flash Unbranded rom in Branded KS20"
Dun tell me you can't understand, unless you can't read english.
If you understand the steps and the rom that you need go ahead n do it, if you still hv no idea after reading my post, then i would say you r too smart to do the flash, i recommend you to stay with french.
Good Luck

Thank you ray, I have found the solution.

Hi guys
I own a greek Vodafone KS20. I bought it in Greece. I live currently in Sweden. The phone at some point had a problem with the touch screen and i sent it though UPS to Greece to be fixed by LG. The phone was working otherwise, appart from the touch screen. They claimed they fixed it, so i paid for the UPS to bring it back (80E all together). I received it today and the phone gives back the anavailable OTP block error while opening. LG Greece claims that they did nothing to the software.
So basically my question is if there is there any other reason that this error would occur besides a bad flashing procedure? They are not paying for the device to be delivered to them and i am not paying another 80E to do it again either.
And the second question, since my line of work is not with computers, is whether there is a kind soul here that would teach an old dog how to fix this step by step? Before Raykisi or abybody else jumps on my back ( ), let me say that I did read this and this but still i am not really sure how to take the first step. I can not get into the device so i cannot press anything on the dialpad.
If i get it right, the process would be to:
- Extract the current Rom or whatever.
- Patch it somehow
- Get it back in?
Is there anyway that i just overwrite it with a new one and be done since I dont wont to unlock the device, not to use an unbranded Rom, just to make it work again.
Thank you in advance for your help and understanding.

Easy problem, but y nobody trying to ask question in my own post?
Here is my own post:
http://forum.xda-developers.com/showthread.php?t=405945
Steps:
1. Find out your phone is Branded or Unbranded, the definition of that is in my post
2. Choose the right rom, Branded phone Branded rom, Unbranded phone Unbranded rom, for english there is not Branded rom so you need hybrid rom for Branded KS20, in my post you can find "English-HK-10a + French-voda-10f Rom", also if you are not after it, there is also a list of official Branded or Unbranded roms
3. Since your phone is hving "OPT problem", you can only flash your phone in emergency mode
Emergency mode: make sure usb is unpluged, turn off device, press and hold "send" and "browser" buttons then press power on, a green led should be turn on, connect it to LGMDP and flash it with the rom you get in step 2
Note: since you flash in Emergency mode your original .nv2 data in KS20 will be lost, if you did make a backup of it b4, restore it back to the phone after flashing, if you dun hv a .nv2 backup read my post at the very top you will find out how to get 1 from me
Also, to connect LGMDP to restore .nv2 file after flashing you ll hv to read this:
http://forum.xda-developers.com/showthread.php?t=396032
BTW, since you will lose your original .nv2 data (my .nv2 solution is not perfect) if you never make a backup b4, i would prefer you send it back to LG
Good luck

raykisi thank you very much for your help
If you feel this should be in your own thread then i can continue there.
1. It is a vodafone mobile, it has the logo, so it is branded.
2. So since it is a greek vodafone mobile i guess that this rom is the correct one????
Greece Vodafone 10g (DZ-KS20-00-V10g-202-05-APR-2-2008+0.dz)
I found it in your thread. Can i flash directly with this Rom?
3. To flash it I need the LGMDP program as you said. I downloaded it and the folder has 4 different versions: Euro, H3G, Open and US. I guess i should use Euro???
4. Will the LGMD recognise by the LGMDP program when i connect it to the USB in emergency mode? How will i know if it is recognised?
5. Are there any special settings in the LGMDP program that i have to select before flashing?
6. If i understand correctly after flashing in emergency mode it is certain that i will lose the nv2 information. I dont have a backup since i was not responsible for this error. I can send you the IMEI so that you send me an nv2 file for my phone. Does this nv2 file work for sure in branded phones? Because you said in the first post that the last digit is always different. What is the possibility it doesnt work from your experience? If it is very low maybe i can take the chance but if not, as you said maybe it is safer to pay another 100E and get it back to LG.
Thanx again for your help
Edit: Not to get me wrong, i understand that there is no responsibility whatsoever by you guys here, whatever i do, i do it myself. I am just trying to understand what are my chances of fixing this darn thing myself.

1. correct
2. correct, but you also can flash to any other language as long as they are Branded rom, or make a hybrid rom
3. I only used Euro b4, hvn't try other version
4 As long as you switch your phone to emergency and connect to USB, LGMDP will recognise it,
but for normal mode which you will use after flashing to restore .nv2 file you hv to follow this post: http://forum.xda-developers.com/showthread.php?t=396032
To restore .nv2 manually by LGMDP Read this (from post #104 to #118):http://forum.xda-developers.com/showthread.php?p=2531611#post2531611
5. Just try to play around with LGMDP, it is not complex, the only tricky thing is, you can press "Original" or "DZ" buttons to switch between two flashing mode
6. with my Branded .nv2 file, you can use with any branded rom, if you want a perfect imei no. you hv to go for LG, if you dun mind the last digit would be different then go for me
Your .nv2 file is ready to pick up, but you didn't send me your email address
If you need further help pls post in my post pls

*Edit: continues here
http://forum.xda-developers.com/showpost.php?p=2599095&postcount=124

cleverguy said:
Hello everybody!
I have read lost of post regaring KS20 flashing procedure.
Most common is to:
1) backup NV2 with LGMDP
2) flash phone with desired ROM erasing EFS
3) restore NV2 settings
The only problem is that after restoring NV2 the phone says "Illegal use" and "Unavailable OTP Block" message appears on the screen, so the phone becomes unusable... :-(
We all should backup NV2 with QPST Service Programming instead of LGMDP.
However if you have a NV2 backup done with LGMDP only there is a solution
1) Flash with any ROM that does not cause "Unavailable OTP Block" error erasing EFS
2) Restore NV2 with LGMDP, but do not restart the phone!
3) Backup NV2 with QPST Service Programming to QCN file
4) Flash with the ROM of your choice erasing EFS
7) Restore NV2 with QPST Service Programming from QCN file
And that is all!
Of course you have to switch USB settings with Engineering Menu after every flashing.
Click to expand...
Click to collapse
Could you teach me how can I
" 2) Restore NV2 with LGMDP, but do not restart the phone!"?
it was restarted automatically after restore NV2 file and then display OTP Block. What can I do?
I was try to Backup NV2 with QPST "after restart and before OTP block".
it was success to save QCN file. But it still no phone after restore QCN file.
Any idea?
PLease help, thanks.

Boris6 said:
Could you teach me how can I
" 2) Restore NV2 with LGMDP, but do not restart the phone!"?
it was restarted automatically after restore NV2 file and then display OTP Block. What can I do?
I was try to Backup NV2 with QPST "after restart and before OTP block".
it was success to save QCN file. But it still no phone after restore QCN file.
Any idea?
PLease help, thanks.
Click to expand...
Click to collapse
did you backup your own branded nv2 file with LG MDP?
If yes, you can reflash the unbranded rom with two mbn files "amss..." and the "partition" mbn file replaced by the three of your branded rom, and then restore your nv2 file, the problem will be solved and your own imei can be back again.

lg ks20 no service

i tried to solve my problem for 1 day before i make this thread.i have an unbraded ls ks20 with english rom v10c.i tried to pass a greek rom (v10g vodafone).after flash it and the phone start setup shows me a message "illegal use" so i went back to english rom.since then my phone doesn't conect to the network "no service".everything else works fine .what should i do?did i kill my brand new lg ks20?

i really need help!

Never flashed before - but you need a special file (nv?) that is unique to your phone. If you didn't back that up, yes you killed it ! If you did search XDA for instructions on how to restore it.

You can do this step to find your signal.
1.backup your ks-20 NV file,the file you can backup from firmware.
2.firm ENG rom and chose ERASE ESF.
3.complete the flash,you can go in the system,and find Windag_open.cab install on the device,and open engineer mode.
4.open firmware,only flash nv file,since reset ,you will find the signal.
I do this to find my signal

lol, He loss calibration data from handset!!!! If there is no service after flashing without NV backup, only way to resolve that problem to flash the NVRAM with backup of another handset and correct IMEI and BT address.

To everyone,
If u need .nv2 file, pm me with ur imei no. and email address, i can generate one for you, but the last digit, which is calculated by your phone, would likely to be different and also i can only generate branded .nv2 since i only got branded .nv2 file. It could be work in unbranded phone but just u need to flash a branded rom or hybrid rom to use with it.

thank you raykisi you are the best it works 100%.

LG KS20 Network Problems
Sorry,
My e-mail is [email protected]

I can't help you with only your email address
Read the posts in my signiture pls

LG KS20 Network Problem
I have read it. Again, many thanks, specially to you; everithing from there was very helpfull.
I will give you the IMEI number: 357323-01-137914-1
I have managed to write the IMEI to the phone with QPSt; do i need to do something else?
If i conect back with QPST shows the IMEI (without the last digit)
Unfortunatell i don't have a valid backup for the nv file
Any help will be great
Ths in advance

Hi raykisi,
I still have my .qcn file... but what I'm trying to do is a little bit different: put a KS20 rom on a MS25 mobile (similar mobile that we have here in Brazil).
I tried to recover my network config using my qcn backup but I couldn't...
My phone always shows "No Service".
Tooo bad...
;(
Hope you can help me...
Thanya

What does ERASE EST do? Why would you think this whole procedure will help find the signal? I asked because my KS20 doesn't find any signal in a lot of places but my wife's KS20 does. I am wondering if there is anything I can try to resolve my problem. Thanks.
sam_sun said:
You can do this step to find your signal.
1.backup your ks-20 NV file,the file you can backup from firmware.
2.firm ENG rom and chose ERASE ESF.
3.complete the flash,you can go in the system,and find Windag_open.cab install on the device,and open engineer mode.
4.open firmware,only flash nv file,since reset ,you will find the signal.
I do this to find my signal
Click to expand...
Click to collapse

LG ks20 - lost IMEI after flashing

Hallo,
I'm new in the forum, i was advised to register here in order to try and find solution to a problem my ks20 has after flashing a rom.
I tried today for the first time to flash a rom in my new ks20(i bought it yesterday used with cooked rom on), i followed this guide http://forum.xda-developers.com/showthread.php?t=369481.
When my phone tried to open, after flashing, this message came up "illegal use unavailable OTP Block".So i flashed another rom in order for the phone to open. With the new rom it opened but it had lost IMEI number and cannot connect with any phone network.
I have made a nv backup with LGMDP but when i try to use LGMDP to restore it i have the same message as before "illegal use unavailable OTP Block" when the phone turns on.
I tried with different roms branded and unbranded. I also tried this http://www.myphone.gr/forum/showthread.php?t=181820&page=360
I dont know what went wrong, nv backup procedure was complete, why do you think that nv backup is not good? I am ready to through the phone away
Maybe you can provide me a solution or another nv backup with my imei ( as i read somewhere in here) if the one i have made is not good.
Thanks , waiting for your help.

LGMDP_EURO that i used to change the rom created two folders: one is called NvBackup and the other folder is named with my imei number, i used both .nv2 files that are included is these folders but every time the result after restoring was the message "illegal use unavailable OTP Block".
I don't know what to do!
Please if anybody has a clue

what rom did you last install?
Was it the branded or unbranded version?

The last rom was Greece Vodafone 10g it is branded.
The problem when i tried to install a cooked rom which i think it awas also branded.
My phone is vodafone branded

did you restore your nv2 in emergency mode?

no i installed a new rom (so that the phone could turn on ok even with wrong imei) and i tried to restore with the phone turned on

shut down your phone, start emercency mode(press : "Send" "Browser" "Power") a green led will shine on your mobile and connect it, and try to restore your back up nv2

how can i do that from emergency mode? i don't have "nv Default" option, also there is no "reset database & contents"

if you have msn send me your email adres in a private message.

Unfortunatelly i dont have msn but i have facebook account.If you have one we can talk from there

sure is the same

I have sent you my account by pm

rickou26 saved the day.
Thank you very much

pagia said:
rickou26 saved the day.
Thank you very much
Click to expand...
Click to collapse
Hi pagia,
I have completely the same story as you.
Could you please share how did you solve it ?
Thanx

Switchke said:
if you have msn send me your email adres in a private message.
Click to expand...
Click to collapse
Hi Switchke,
I completely have the same story as pagia, could you please help me ?
I do not have msn but a pm could I send my pm ?
Thank you in advance.

zezika said:
Hi pagia,
I have completely the same story as you.
Could you please share how did you solve it ?
Thanx
Click to expand...
Click to collapse
Did you solve your problem?
If not give rickou26 your imei number and ask him to make you a backup nv2 file.

use the program MTTY because it's only USB or has unlock without backup (like me) and has still bluetooth activated car solve the imei and bd address problem with that (should be works with usb cable also) :
1) get the phone recognized by windows and activate modem serial port interface
bluetooth perifs-> properties -> services -> check the 2 boxs
3) start -> programs -> accesories -> communication -> hyperterminal ->
set a name and modem port (should be found in step 1)
'call' (yellow phone)
4) type "AT" (without quotes) should see "OK"
5) type ATZ (activate echo)
6) AT%IDDE to unlock
7) AT%IMEI=X,X,X,X, ....
(15 chars) replace X by IMEI code or what you want
8) AT%BTAD=X,X,x,x,x,x ...
(12 chars from 0x0 ->0xF) same for bluetooth address, warning : the digits are in little endian (inversed)
9) switch off and on and the bluetooth should work again without asking for BD address
this method has worked for a KU380 only by bluetooth without install third party program to backup or repair and should works for other phones

help this dummy out ...
i met with the similar issue....
flashed my ks20 to upgrade to win 6.1
lost IMEI, bluetooth ID,...
QPST recognises the fone in 'download mode'...
so what can i do to recover my fone?

hi
hi all, i have just the same problem with ks20. I dont have imei and i do not backup the nv files. My phone is just a pda, no signal. On the back of the phone my imei is 357323-01-085909-3. Please help me, i have email [email protected]

KS20i nv2 restore error.(Solved)

first of all i am sorry for making new thread even there are a lot of posts about LG KS20.
i got a lg ks20 working.
made in Korea
i dont know which language it had.
i searched and downloaded LGMDP software drivers and english rom.
it was my first so i did not made backup of NV2 make i was not aware and i flashed it in emergency mode instead of normal mode
now cell working ok in english but no network coz imie is 000000000023000 some like this.
now i got
LG_KS20_NV2_QCN_TOOLS1.4
but problem is i cant write nv2
my cell connect perfect in emergency mode
but when i power on it and connect cable phone power off and show insert battery.
with LGMDP i cant manually write nv2 bcoz nv2 line not occur in files list.
so if any expert can solve my problem please help me.
the main problem i have i cant connect cell in normal mode
i changed diag setting using 2676625720#
i installed windiag_open.cab using mmc coz i cannot connect to active sync

i also tried this method but not working
http://forum.xda-developers.com/showthread.php?t=656173&highlight=ks20+insert+battery

No Body to help ?
please i know there is search button
but i am confused no solution for my problem
please help me

Hi,
You must generate a new NV2 with my software and your IMEI code (see the box, invoice etc.).. Then you flash your phone in emergency mode, you do erase EFS and you selectiones the NV2.
by
http://forum.xda-developers.com/showthread.php?t=681143
http://forum.xda-developers.com/showthread.php?t=534704

but sir there is no nv2 option in download image page in my version of lgmdp
which version i should use
i tried 3 different versions

Thanks every one for their help
My problem solved.
All my problem was
i was unable to connect my cell powered on.
when i pluged cable to cell
it powered off and showing INSERT BETTRY
and in emergency mode there is no way to restore nv2 file
My
Problem solved by charging bettry with external power supply for 40 mints
may be my bettry was faulty.
now nv2 is restored and i can change any rom withouts any problem
now my cell connects with active sync and every thing is ok
i have browsed internet for 30 days
and saw a lot off users having same problem
may be it would be helpful for somebody
Thanks again experts