Disclaimer: I will not be responsible for anything that happens to your phone after following this post. You are doing this because you choose to and you alone are responsible for anything that may happen. Use at your own risk.
In this method, you are doing a full wipe of your phone including ROM and force flashing everything from scratch. So there is a risk of permanently bricking you phone (i.e. your phone will look just like it doesn't have a battery and you can use it as a very expensive paper weight). If you have already rooted, installed a custom recovery and you are able to boot to custom recovery, then I do not recommend using this method (though it will work just fine). If you can boot into recovery, restore a previous backup or flash a new ROM or reflash your current ROM - no matter how many times you try to flash from recovery, you will never brick your device (i.e. it is a safer method).
Please not that since this method does a complete wipe, you will loose root, custom recovery etc. You can still root again after you fix your phone. For those who haven't rooted, just ignore that.....
NOTE: This should work for any screen you are stuck at. I'm just mentioning the screens I have come across.
If your phone is stuck at the LG/Android boot screen or emergency mode or a black screen saying
fastboot mode started
udc_start()
then your phone isn't bricked, you dont need to panic. Your phone can be fixed right at home by following these steps.
After doing some research, I found that
fastboot mode started
udc_start()
is displayed when we do something like install custom recovery and failed.
There may or may not be additional lines of text, but the procedure is the same for all such cases where the starting 2 lines are the above.
1. Download KDZ Updater and LG united mobile drivers from here.
2. Extract the rar file and install LG United mobile drivers.
3. Disable all LGE modems under modems from windows device manager.
4. Charge your phone since we cant really tell how much juice is left in the battery even though the screen is on.
5. Download the stock firmware (also known as rom) from Lg’s firmware repository. You can download the firmware and firmware version suiting your region from the links I have provided below. But many of these links may not work, so to download the stock 2.2.2 ROM build V10D_00 for India, click here. If you choose to download this stock ROM, then ignore Methods 1 & 2 given below. If however you want to download a ROM for a different country and version, then follow Method 1 or 2.
Method 1:
The following link will list all the country codes for LG optimus p 500.
http://csmg.lgmobile.com:9002/csmg/b2c/client/ezlooks_model_list.jsp?model=LGP500
Press ctrl + f on the keyboard to bring up the browser search tool and type the name of your country.
Copy your country’s code. For example for india its AINDBK. Now paste it in the url below where it is marked XXXXXX.
http://csmg.lgmobile.com:9002/swdata/WEBSW/LGP500/XXXXX/V10b_00/V10B_00.kdz
Your link would look something like this after pasting the code
http://csmg.lgmobile.com:9002/swdata/WEBSW/LGP500/AINDBK/V10b_00/V10B_00.kdz
Replace the V10b_00/V10B_00.kdz with the version number you want. For example if i want to install version 10C then i would change the letters from c to b like this V10c_00/V10C00.
Now copy and paste the link in the addressbar of your browser and press enter key. Download should start.
This method may not work for all countries.
Method 2:
If the above method didn't work (it didn't for me), then here’s a list of the latest unbranded firmware as of 9/03/2011 4:15 EST
Just click on the links below to start the DOWNLOAD
[ROMS] Original LG Firmware list - Page 18 - xda-developers
LGP500 – AAUSBK – AUS/AUSTRALIA
Newest found : http://csmg.lgmobile.com:9002/swdata/WEBSW/LGP500/AAUSBK/V10b_00/V10B_00.kdz
LGP500 – ABALSV – BAL/BALTICS
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10E_00.kdz
LGP500 – ACISSV – CIS/CIS
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – ACZEBK – CZE/CZECHO
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – ADEUBI – DEU/GERMANY
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10E_00.kdz
LGP500 – AESPBK – ESP/SPAIN
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – AGBRBK – GBR/UNITED KINGDOM
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10A_00.kdz
LGP500 – AGLOBK – GLO/Philippines GLO
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10B_00.kdz
LGP500 – AGRCBK – GRC/GREECE
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – AHKGBK – HKG/HONG KONG
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10B_00.kdz
LGP500 – AHUNBK – HUN/HUNGARY
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – AINDBK – IND/INDIA
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10D_00.kdz
LGP500 – AIRQBK – IRQ/IRAQ
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10D_00.kdz
LGP500 – AITABK – ITA/ITALY
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10E_00.kdz
LGP500 – ANEUBK – NEU/EUROPE OPEN
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – ANGRBK – NGR/NIGERIA
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10A_00.kdz
LGP500 – AORIBK – ORI/ORANGE ISRAEL
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – APOLBK – POL/POLAND
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – APRTBK – PRT/PORTUGAL
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10E_00.kdz
LGP500 – ARUSSV – RUS/RUSSIAN FEDERATION
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – ASGPBK – SGP/SINGAPORE
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – ASLOBK – SLO/SLOVENIA
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10D_00.kdz
LGP500 – ASWSBK – SWS/Switzerland
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10D_00.kdz
LGP500 – ATHABK – THA/THAILAND
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – ATWNBK – TWN/TAIWAN
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10C_00.kdz
LGP500 – AVNMBK – VNM/VIETNAM
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – AZAFBK – ZAF/SOUTH AFRICA
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10A_00.kdz
LGP500 – ASEABK – MALAYSIA
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10A_00.kdz
6. Install msxml (from the KDZ Updater folder) on your windows pc by double clicking it.
7. a. If your phone is stuck at the Android screen or LG screen or Emergency screen, connect your phone to your PC via USB.
b. If your phone is stuck at fastboot mode started udc_start() screen, then remove the battery and reinsert it. Now press the back key and volume up button and simultaneously connect your phone to your PC. You will get a greenish yellow screen saying Emergency mode.
8. Run KDZ_FW_UPD.exe with administrator privilages (right click, run as administrator in win7).
9. In the software window, select Type as 3GQCT
Select PhoneMode as "DIAG" if your phone is not in emergency mode (i.e., if your phone is in LG/Android screen). If you are in emergency mode, select "Emergency".
In the place where you have to give path for KDZ file, select the Firmware a.k.a ROM you have downloaded using the link you made for your country specific firmware.
10. Press Launch software update and wait for about 10 or 15 minutes. The screen will then say “Emergency mode”. Just wait and let it reboot. Do not disconnect your phone till it is shown "finished".
11. Now switch on your phone. Finished!
[OPTIONAL] Hit the thanks button!
Note: If kdz is unable to see your phone, then try running kdz in compatibility mode for XP, restarting your phone, shaking your phone (I know it sounds crazy but it works sometimes!), restarting your computer, try and try again till it works.
NOTE: If KDZ stops working and phone gets stuck in recovery mode and you have to remove the battery just to turn off the phone, and you cant get into recovery mode or emergency mode, but you're stuck at a black screen, remove the battery and connect the phone via USB to a computer which has LG United mobile drivers installed. Disable all LGE modems under modems from windows device manager.
Unplug the usb cord from your PC and plug it in again. You still shouldn't have a battery in your phone, yet by plugging it in the "Emergency mode" should start automatically. Open up KDZ, select Type "3GQCT" and PhoneMode "EMERGENCY". Select a KDZ file and flash it.
NOTE: If your phone doesn't even turn on, the try holding back + vol up + power and simultaneously connect to a computer which has LG United mobile drivers intstalled via USB. Then you should reach emergency mode. Then just follow the steps mentioned above.
In this method, you are doing a full wipe of your phone including ROM and force flashing everything from scratch. So there is a risk of permanently bricking you phone (i.e. your phone will look just like it doesn't have a battery and you can use it as a very expensive paper weight). If you have already rooted, installed a custom recovery and you are able to boot to custom recovery, then I do not recommend using this method (though it will work just fine). If you can boot into recovery, restore a previous backup or flash a new ROM or reflash your current ROM - no matter how many times you try to flash from recovery, you will never brick your device (i.e. it is a safer method).
Please not that since this method does a complete wipe, you will loose root, custom recovery etc. You can still root again after you fix your phone. For those who haven't rooted, just ignore that.....
NOTE: This should work for any screen you are stuck at. I'm just mentioning the screens I have come across.
If your phone is stuck at the LG/Android boot screen or emergency mode or a black screen saying
fastboot mode started
udc_start()
then your phone isn't bricked, you dont need to panic. Your phone can be fixed right at home by following these steps.
After doing some research, I found that
fastboot mode started
udc_start()
is displayed when we do something like install custom recovery and failed.
There may or may not be additional lines of text, but the procedure is the same for all such cases where the starting 2 lines are the above.
1. Download KDZ Updater and LG united mobile drivers from here.
2. Extract the rar file and install LG United mobile drivers.
3. Disable all LGE modems under modems from windows device manager.
4. Charge your phone since we cant really tell how much juice is left in the battery even though the screen is on.
5. Download the stock firmware (also known as rom) from Lg’s firmware repository. You can download the firmware and firmware version suiting your region from the links I have provided below. But many of these links may not work, so to download the stock 2.2.2 ROM build V10D_00 for India, click here. If you choose to download this stock ROM, then ignore Methods 1 & 2 given below. If however you want to download a ROM for a different country and version, then follow Method 1 or 2.
Method 1:
The following link will list all the country codes for LG optimus p 500.
http://csmg.lgmobile.com:9002/csmg/b2c/client/ezlooks_model_list.jsp?model=LGP500
Press ctrl + f on the keyboard to bring up the browser search tool and type the name of your country.
Copy your country’s code. For example for india its AINDBK. Now paste it in the url below where it is marked XXXXXX.
http://csmg.lgmobile.com:9002/swdata/WEBSW/LGP500/XXXXX/V10b_00/V10B_00.kdz
Your link would look something like this after pasting the code
http://csmg.lgmobile.com:9002/swdata/WEBSW/LGP500/AINDBK/V10b_00/V10B_00.kdz
Replace the V10b_00/V10B_00.kdz with the version number you want. For example if i want to install version 10C then i would change the letters from c to b like this V10c_00/V10C00.
Now copy and paste the link in the addressbar of your browser and press enter key. Download should start.
This method may not work for all countries.
Method 2:
If the above method didn't work (it didn't for me), then here’s a list of the latest unbranded firmware as of 9/03/2011 4:15 EST
Just click on the links below to start the DOWNLOAD
[ROMS] Original LG Firmware list - Page 18 - xda-developers
LGP500 – AAUSBK – AUS/AUSTRALIA
Newest found : http://csmg.lgmobile.com:9002/swdata/WEBSW/LGP500/AAUSBK/V10b_00/V10B_00.kdz
LGP500 – ABALSV – BAL/BALTICS
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10E_00.kdz
LGP500 – ACISSV – CIS/CIS
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – ACZEBK – CZE/CZECHO
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – ADEUBI – DEU/GERMANY
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10E_00.kdz
LGP500 – AESPBK – ESP/SPAIN
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – AGBRBK – GBR/UNITED KINGDOM
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10A_00.kdz
LGP500 – AGLOBK – GLO/Philippines GLO
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10B_00.kdz
LGP500 – AGRCBK – GRC/GREECE
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – AHKGBK – HKG/HONG KONG
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10B_00.kdz
LGP500 – AHUNBK – HUN/HUNGARY
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – AINDBK – IND/INDIA
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10D_00.kdz
LGP500 – AIRQBK – IRQ/IRAQ
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10D_00.kdz
LGP500 – AITABK – ITA/ITALY
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10E_00.kdz
LGP500 – ANEUBK – NEU/EUROPE OPEN
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – ANGRBK – NGR/NIGERIA
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10A_00.kdz
LGP500 – AORIBK – ORI/ORANGE ISRAEL
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – APOLBK – POL/POLAND
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10H_00.kdz
LGP500 – APRTBK – PRT/PORTUGAL
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10E_00.kdz
LGP500 – ARUSSV – RUS/RUSSIAN FEDERATION
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – ASGPBK – SGP/SINGAPORE
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – ASLOBK – SLO/SLOVENIA
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10D_00.kdz
LGP500 – ASWSBK – SWS/Switzerland
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10D_00.kdz
LGP500 – ATHABK – THA/THAILAND
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – ATWNBK – TWN/TAIWAN
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10C_00.kdz
LGP500 – AVNMBK – VNM/VIETNAM
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10F_00.kdz
LGP500 – AZAFBK – ZAF/SOUTH AFRICA
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10A_00.kdz
LGP500 – ASEABK – MALAYSIA
Newest found : http://csmg.lgmobile.com:9002/swdata…00/V10A_00.kdz
6. Install msxml (from the KDZ Updater folder) on your windows pc by double clicking it.
7. a. If your phone is stuck at the Android screen or LG screen or Emergency screen, connect your phone to your PC via USB.
b. If your phone is stuck at fastboot mode started udc_start() screen, then remove the battery and reinsert it. Now press the back key and volume up button and simultaneously connect your phone to your PC. You will get a greenish yellow screen saying Emergency mode.
8. Run KDZ_FW_UPD.exe with administrator privilages (right click, run as administrator in win7).
9. In the software window, select Type as 3GQCT
Select PhoneMode as "DIAG" if your phone is not in emergency mode (i.e., if your phone is in LG/Android screen). If you are in emergency mode, select "Emergency".
In the place where you have to give path for KDZ file, select the Firmware a.k.a ROM you have downloaded using the link you made for your country specific firmware.
10. Press Launch software update and wait for about 10 or 15 minutes. The screen will then say “Emergency mode”. Just wait and let it reboot. Do not disconnect your phone till it is shown "finished".
11. Now switch on your phone. Finished!
[OPTIONAL] Hit the thanks button!
Note: If kdz is unable to see your phone, then try running kdz in compatibility mode for XP, restarting your phone, shaking your phone (I know it sounds crazy but it works sometimes!), restarting your computer, try and try again till it works.
NOTE: If KDZ stops working and phone gets stuck in recovery mode and you have to remove the battery just to turn off the phone, and you cant get into recovery mode or emergency mode, but you're stuck at a black screen, remove the battery and connect the phone via USB to a computer which has LG United mobile drivers installed. Disable all LGE modems under modems from windows device manager.
Unplug the usb cord from your PC and plug it in again. You still shouldn't have a battery in your phone, yet by plugging it in the "Emergency mode" should start automatically. Open up KDZ, select Type "3GQCT" and PhoneMode "EMERGENCY". Select a KDZ file and flash it.
NOTE: If your phone doesn't even turn on, the try holding back + vol up + power and simultaneously connect to a computer which has LG United mobile drivers intstalled via USB. Then you should reach emergency mode. Then just follow the steps mentioned above.
.
