My Tech Notes: lg

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You need a Windows PC (Windows XP sp3 or Windows 7 32/64 bit)
Find and download the official ROM/firmware update for your LG P690 (P690F) mobile phone.
Download and install Windows USB driver
Download and install Software Update utility
Download and extract KDZ_FW_UPD_EN.7z
Configure your phone: Settings -> Applications -> Development, Tick USB Debugging
Connect your phone to the Windows PC using USB cable and wait until all the drivers are installed automatically
Connect the phone but DO NOT turn on USB storage
Run KDZ_FW_UPD.exe as Administrator
Set Type: 3GQCT Phone Mode: DIAG
Select the .kdz file you downloaded in step 1
Press Lauch Software Update to start and wait (for 6~10 minutes) until you see --FINISHED-- line. (In the meantime, your phone gets into Emergency mode.)
The phone should reboot itself. For me, it failed to reboot, it hangs in the LG splash logo then reboots again infinitely. To fix it, turn off the phone and then press and hold the [Power] + [Volume Down] + [Home] buttons. Wait till you see the droid with the progress bar under it then release the buttons.

NOTE: If the phone hangs at the splash LG logo, the phone may not be really bricked. Try the following to fix it:
- Turn off the phone and then press and hold the [Power] + [Volume Down] + [Home] buttons. Wait till you see the droid with the progress bar under it then release the buttons.
To fix the bricked LG P690:

Press and hold [Power] + [Volume Up] + [Return] buttons until gets into yellow emergency mode

Find your LG mobile phone's Model and Serial Number. e.g. My phone model is P690F and its S/N is 123ABCD123456(it is labeled under battery).
Type the following address in your web browser's url field:
http://csmg.lgmobile.com:9002/svc/popup/model_check.jsp?model=[model]&esn=[serial_number]
replace the [model] and [serial_number] with your LG phone's model and serial number.
Type return to load the page. It should returns a string. You need to view the page source:

On Firefox: Tools -> Web Developer -> Page Source (Ctrl+U or Command+U)
On Safari: Right click blank area in the page, select View Source in the context menu
On IE: View -> Source

Find the number inside <ESN></ESN> tag
Type the following address in your web browser's url field:
http://csmg.lgmobile.com:9002/csmg/b2c/client/auth_model_check2.jsp?esn=[esn_number]
substitute the [esn_number] with the ESN number we get from last step.
Load the page (it is a blank page in web browser), you need to view page source, you can then see the ROM update url inside <sw_url></sw_url> tag.

You need a Windows PC (Windows XP sp3 or Windows 7 32/64 bit)
Download the V10F_00.kdz ROM(China Chinese/English)
Download and install Windows USB driver
Download and install Software Update utility
Download and extract KDZ_FW_UPD_EN.7z
Configure your phone: Settings -> Applications -> Development, Tick USB Debugging
Connect your phone to the Windows PC using USB cable and wait until all the drivers are installed automatically
Connect the phone but DO NOT turn on USB storage
Run KDZ_FW_UPD.exe as Administrator
Set Type: 3GQCT Phone Mode: DIAG
Select the V10F_00.kdz file
Press Lauch Software Update to start and wait (for 6~10 minutes) until you see --FINISHED-- line. (In the meantime, your phone gets into Emergency mode.)
The phone should reboot itself. For me, it failed to reboot, it hangs in the LG splash logo then reboots again infinitely. To fix it, turn off the phone and then press and hold the Power + Volume Down + Home buttons. Wait till you see the droid with the progress bar under it then release the buttons.

My Tech Notes