The most coveted of all the custom ROMS, the CM7 ROM, has been available for LG Optimus GT540 for sometime. Only couple of weeks before, a new version 2.3.4 was released and I just tried it out and was completely amazed by the ROM, just like everybody who has ever tried it is. Following is the tutorial for all LG GT540. The whole time I’ve used this ROM I have not had any problems, everything works perfect and fast. LG Android Phones


  • Make sure your phone is fully charged! Update process will take some time.
  • Make sure there’s enough free space at your internal sdcard (200MB)
  • Download KDZ Updater. (Include KDZ Updater and RomFastboot) http://www.fileserve.com/file/DvS66ex

How to flash LG Optimus GT540 to CM7 Android 2.3.4 Gingerbread Instructions: LG Phone Problem and Solution

1- During installation, all your data will erase (contacts, configurations, data and applications installed), but if you dont want to lose the information, you should make a backup using MyBackupPro. http://www.fileserve.com/file/sTYJNgs

2- To install Android 2.3.4, you need to first have a fastboot rom installed on the LG Optimus GT540. If your phone already has a rom with fastboot skip to step 11.

3- Install msxml.

4- Then install the necessary drivers for your LG Optimus GT540 to be recognized, for this installLGAndroidDriver_WHQL_ML_Ver1.0_All_Win7-Vista (you can use this for XP, Vista and 7) http://www.fileserve.com/file/jKM8rwy (Archivos proporcionados por jaret). FOR WINDOWS XP USERS also need to download this: http://www.fileserve.com/file/DpKzhqa ,unzip it and right click file android_usb and click "Install."

5- Run KDZ_FW_UPD. Change “Type” a “3GQCT” and “PhoneMode” “DIAG”. Browse romfastboot.kdz in KDZ Folder and clic Open. 




















6-In your phone ABLE DEBUGGING USB, Settings>Aplications>Development> USB Debugging

7- Plug the cable into your LG Optimus GT540 and PC, and expects to be fully recognized by the drivers.

8- Now clic “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).

9- When this process completes, the fastboot is now installed on phone.


11. Turn off your phone, press the camera button and power button while pressing do not leave until the FastBoot mode is activated, you will realize that it is activated when there appears nothing on the screen just stay with the backlight on.

12- CONNECT THE PHONE TO PC. Run “Android234GT540” and follow the steps of the installer. (DO NOT DISCONNECT THE PHONE UNTIL THE PROCESS IS COMPLETE)













13- NOW YOU HAVE ANDROID GINGERBREAD 2.3.4 IN YOUR PHONE. Change the language in Settings.

Caution: Whatever you do, do at your own risk, I just shared original materials and obviously will take no responsibility. If you have any question when flashing your LG Optimus GT540, feel free to let me know, I will reply you as soon as possible. LG-Optimus info

LG Cell Phone – Related Posts


Chris on 18 June, 2011 at 8:26 am #

Thank you YES woop woop been tyrin to get cyanogen mod for months

biep on 19 June, 2011 at 5:36 am #

you should mention your sources as it was devellopped by Mur4ik from from 4pda.ru !
But…this one works perfectly – I did it and running on gingerbread now ;-)

biep on 19 June, 2011 at 10:07 am #

couldn’t find a stock app for my pop3 mail program. seems the app didn’t com with the rom. I searched and found it on xda developpers site : this one worked :http://forum.xda-developers.com/showthread.php?t=775007

jimbob on 22 June, 2011 at 6:29 am #

followed the steps on my phone all seemed to go to plan. But now all my apps force close everytime?

mjl7972 on 30 June, 2011 at 10:48 am #

I have followed the steps above but when I press launch software update I get a phone not connected error

I am running win7 and have firmware 2.1 update 1 and version v20b

Any advice would be greatly appreciated

Renato on 2 July, 2011 at 6:26 am #

Gostaria de Parabenizar pelo Post ficou muito bom e funcionou corretamente no meu celular.

alvin on 7 July, 2011 at 9:29 am #

It stuck in “searching for device”. what should be the problem? help please :|

Abhishek on 12 July, 2011 at 6:00 am #

Pls help me. I tried all of this. the fast boot is installed then i press the android 2.3.4. After the cmd window open, the only msg comes that “waiting For device”. What will i do. The Gingerbread is not installed in my phone.

Abhishek on 12 July, 2011 at 6:01 am #

PLs help me. reply as early as possible.

amol on 29 July, 2011 at 8:48 am #

what is its over clock frequency of 2.3
will it cause any problem if i try to make update from 2.1 to 2.3 without installing driver to the pc .
plz help me or reply me or email me sir.

nelson on 3 August, 2011 at 4:29 am #

viva. sera que alguem pode me ajudar? fiz os passos todos correctos e ele fica bastante tempo na parte onde o android anda em skate.não da para fazer nada. podem me ajudar? please

robin on 6 August, 2011 at 9:24 am #

i am getting error while updating rom with fastboot in my lg gt 540 please help me (my current rom is v20c india)

[00:07:23:662] : =============================================
[00:07:23:662] : Log is started on 01.01.2006, at 00:07:23:662,
executable: C:\Robin\New folder\KDZ Updater\KDZ_FW_UPD.exe (ProcID: 0x00000e08),
compile time : Sep 8 2010 17:19:53
[00:07:23:662] : Version :
[00:07:23:662] : strFilename1 = eur

[00:07:23:693] : m_DlMode = 4, m_strBinaryPath = C:\ProgramData\LGMOBILEAX\Phone\europen+fastboot.dz, m_nSelectedImages= 70787108

[00:07:41:302] : Start Web Downloading
[00:07:41:302] : Get Usb Port
[00:07:41:365] : rsi.strFriendlyName=Communications Port (COM1)

[00:07:41:365] : Remove Communications Port (COM1)

[00:07:41:365] : rsi.strFriendlyName=Communications Port (COM2)

[00:07:41:365] : Remove Communications Port (COM2)

[00:07:41:365] : rsi.strFriendlyName=LGE Bluetooth TransPort (COM6)

[00:07:41:365] : Remove LGE Bluetooth TransPort (COM6)

[00:07:41:365] : rsi.strFriendlyName=LGE Android USB Serial Port (COM8)

[00:07:41:365] : FriendlyNameList[iii].szFriendlyName=LGE Android USB Serial Port

[00:07:41:365] : rsi.strFriendlyName=LGE Android USB GPS NMEA Port (COM9)

[00:07:41:365] : Remove LGE Android USB GPS NMEA Port (COM9)

[00:07:41:365] : WM_COPYDATA ¸Þ½ÃÁö º¸³¿ 1 – COM8
[00:07:41:365] : Port = COM8
[00:07:41:365] : Clear
[00:07:41:365] : Clear
[00:07:41:380] : >> DIAG_STATUS_F FAILED
[00:07:41:396] : >>Get Model Name [DIAG_VERNO_F]
[00:07:41:396] : Clear
[00:07:41:412] : strModel = GT540
[00:07:41:412] : Read NV item: 71 NV ITEM 71 [71]
[00:07:41:412] : Clear
[00:07:41:427] : CSW
[00:07:41:427] : Banner : CSW
[00:07:41:427] : WM_COPYDATA ¸Þ½ÃÁö º¸³¿ 0 – GT540
[00:07:41:427] : >>Get Mobile SW [DIAG_EXT_BUILD_ID_F]
[00:07:41:427] : Clear
[00:07:41:443] : GT540-M76XX-V20c-DEC-03-2010-XX
[00:07:41:443] : strFilename = GT540-M76XX-V20c-DEC-03-2010-XX

[00:07:41:443] : strFilename = V20

[00:07:41:443] : Flag_Phone_BIN_Eclair = TRUE

[00:07:41:443] : Clear
[00:07:41:458] : Write NV item:9028 NV ITEM 9028
[00:07:41:458] : 9028 – NV_DONE_S Item
[00:07:41:568] : _DloadMode()
[00:07:41:568] : ¸Þ½ÃÁö º¸³¿ TYPE_WPARAM_CHANGE_DLOAD 4
[00:07:41:568] : >>Change Offline Mode [DIAG_CONTROL_F/Mode = 1]
[00:07:41:568] : Clear
[00:07:41:583] : >>Change Dload Mode [DIAG_DLOAD_F]
[00:07:41:583] : WM_COPYDATA ¸Þ½ÃÁö º¸³¿ 3 – DLOAD
[00:07:41:583] : Clear
[00:07:41:583] : 2_DIAG_DLOAD_F DLOAD_RESET_F do not wait for response
[00:07:41:583] : #ifdef FEATURE_L4

[00:07:41:583] : Clear
[00:07:41:583] : WM_COPYDATA ¸Þ½ÃÁö º¸³¿ 3 – Close Port
[00:07:41:583] : Close Port<<
[00:14:21:593] : OPEN_PORT_FAIL
[00:14:21:656] : ¸Þ½ÃÁö º¸³¿ – TYPE_WPARAM_UPGRADE_ERROR Error Code = 6
[00:14:21:671] : Log finished

s.prabhu on 20 September, 2011 at 11:51 pm #

this site is for android 2.3.5. on lg gt540 ======
note: pls follow the instruction correctly, if not u will be in trouble….

jeyaram on 21 September, 2011 at 6:20 am #

hey its working great. i just installed gingerbread in GT540. Great work. thank u very much………

joe on 9 October, 2011 at 11:53 am #

will this work on lg vortex?

Gunnar on 30 October, 2011 at 2:38 pm #

Works great,

1 problem. I changed my language but the menu items still stay russian. Any idea how to fix?

junior on 24 December, 2011 at 10:52 am #

it stays in “waiting for device”. plz help

kedar on 26 December, 2011 at 6:37 am #

please help me…. my phone is not responding anything after rebooting it it is just showing LG…… what to do now??

kedar on 26 December, 2011 at 6:39 am #

I got the status as download mode…. at that time i disconnected the phone and it is hung up now……. nothing is happening……please tell me something….fast…

Stifler on 13 January, 2012 at 3:11 am #

Je ni arrive pas tout les lien son mort et mon portable rame sa me soul help me merci

mayank on 14 January, 2012 at 8:04 pm #

the romfastboot.kdz should not be used instead V20A or B should be used

Wagner Alessandro Araujo on 3 February, 2012 at 6:17 pm #

Muito bom! funcionou mesmo, só preciso descubrir onde mudo a linguagem :)

Ashok on 3 February, 2012 at 6:25 pm #

nothing changed same as it is before 2.1, i have followed all the steps above, please suggest me any other way to upgrade gt540

Ashok on 3 February, 2012 at 7:33 pm #

above steps not working not working, tried 3 to 4 times …..

kasim on 18 March, 2012 at 10:40 am #

please help me…. my phone is not responding anything after rebooting it it is just showing LG…… what to do now??

I got the status as download mode…. at that time i disconnected the phone and it is hung up now……. nothing is happening……please tell me something….fast…

Anonymous on 24 March, 2012 at 10:17 am #

Great!!!! Thanks, just what I needed. This works perfectly!

superem on 17 April, 2012 at 10:43 am #

Hello, and thanks for being so clear in your tutorial. I just have a problem with the files to download, because of the new policy of FileServe (only the uploader can have access to his/her files). I have tried to locate the file containing KDZ Updater and RomFastboot, but to no avail. Could it be possible for you to upload it to another site ? If necessary, I could give you an ftp address. Many thanks, superem

Dhaval Patel on 21 April, 2012 at 5:05 am #

Same problem as per @superem.
I am not able to download http://www.fileserve.com/file/CVF2r9v file. Can you give me another url for download? Thanks in advance.

Katerina on 25 April, 2012 at 9:22 am #

Hello guys so @superm and @Dhaval Patel and everyone with the same problem as them what I did is that I searched the links to google and the first result was the site right but it also showed the name of the file and I found it in
other filesharing websites Sorry for my english hope it will help you

Katerina on 25 April, 2012 at 9:52 am #

Dhaval Patel on 25 April, 2012 at 9:31 pm #

Thanks Katerina

I got KDZ Updater but I need first RomFastboot for LG GT540. So, Please help me.


Dhaval Patel on 25 April, 2012 at 10:06 pm #

Thanks Katerina I try your link and get it all I really appreciate your work thanks

Dcmewara on 29 May, 2012 at 1:55 am #

plzzzz help me how to upgrade 2.1 to 2.3

Dcmewara on 29 May, 2012 at 1:56 am #

Dhaval ji plz my help..

Anonymous on 18 October, 2012 at 11:32 pm #

same here

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