[Optimus One, P500 Android Development] pariksheetsharma:
Most of you are stuck on a yellow screen with”Emergency mode!!” or the phone is not responding at all. You guys wanted a custom rom like Optimus Prime-v2 and let me tell you, this time it will work. Optimus One P500 comes with stock android 2.2 – V10a, V10b … and android 2.2.1 – V10n. They might be done for different regions depending upon the phone release and its popularity and definitely bug fixes and enhancements. To have Prime-v2 on your handset you will require V10a or V10b on your handset. Reason, V10n stock cannot be rooted easily. Rooting the handset is must if Prime-v2 is required on the device. Steps to install V10a, V10b series. I am using Windows 7 32-bit, 3 GB RAM laptop:

1.	Clean your system first; get rid of LG PC suite and other stuff shown in Uninstall Program with vendor name as LG. Remove MSXML builts from the handset. Remove Nokia and other drivers if they are on system like Ovi suite etc. I also removed a lot of Microsoft runtime environments. Not sure about the reason but it worked for me.

2.	LG usb device drivers, download the application B2CAppSetup.exe http://csmg.lgmobile.com:9002/client/app/B2CAppSetup.exe .

3.	In the Menu Bar, click "Options & Help", and click "Country & Language". Select the appropriate Country & Language. I used India and select P500 from the list that popup after you change the country and region. It will download, install and save the drivers somewhere in C:\LGP500\USB_Driver, it will prompt to open the rar files, just click and install the exes seen in them.

4.	Reboot the system.

5.	Right click on Computer -> Properties -> Device Manager and see for three drivers – LG android usb modem, LGE serial usb port and LG composite USB device. Disable the modem driver and reboot once again.

6.	Switch off the phone and press volume up + BACK button + POWER button. Phone should turn yellow with text “Emergency Mode!!” To switch it off you have to remove the battery (I know it hurts, but that’s the only way out here). Switch off and let’s continue with the setup.

7.	To do the KDZ of system you will require the KDZ software updater, links keep going off and on internet. Try searching for “KDZ_FW_UPD_EN” or “KDZ_FW_UPD_EN.7z” in Google and download the software. It should be somewhere around 2.3 MB. To use it you will required some good version of WinZip or winrar again Google it and install the 7z archive utility.

8.	Install msxml.msi as the manual or readme.txt says to do so.

9.	To get the V10x Official ROM, you need to first determine the ROM of your choice. List of all firmware available for LG Optimus One P500 (list of codes) http://csmg.lgmobile.com:9002/csmg/b2c/client/ezlooks_model_list.jsp?model=LGP500 , search for your country (use IE it looks sexy in it), I looked out for IND/INDIA. Download link to the ROM is http://csmg.lgmobile.com:9002/swdata/WEBSW/LGP500/XXXXX/V10a_00/V10A_00.kdz where XXXX is code from list of codes. In my case it was: AINDBK. Save the file.

10.	Prepare the handset by removing the SD card and boot it to emergency mode (some are already stuck on it so reading this post…: D) using the key combination stated above.

11.	Connect to the PC and it should say, installing drivers’ blah… blah … your device is ready to use now.

12.	Run the KDZ updater downloaded in step 7. Select 3GQCT in Type, DIAG in PhoneMode, and browse for ROM V10a in KDZ file and hit Launch Software update. Wait for somewhere around 5-10 minutes. It should say ===FINISHED=== in the log window of updater.

13.	Handset will reboot, if not wait for another 5 minutes. Unplug from USB and try to switch it on.

If you guys wants help with details on setting up the custom ROM, I mean more detailed information like above let me know. I will try to help you out.