Flashing LG Optimus One back to Original Firmware

Preparation

• Install driver LG P500, you can find it at LG official homepage or download below
  After install the driver restart you PC/Laptop then go to Control Panel -> System -> Hardware -> Device Manager -> Modems -> Right click LGE Virtual Modem, choose Disable.
• KDZ Updater, we`ll need it for flashing firmware. download and extract kdzupdater and install the msxml.msi
• LG Optimus One Firmware that suitable with your region (in this tutorial, using firmware v10c singapore region)

Note: It`s better idea to close similiar application, such as KIES, ovi suite, BB desktop manager

How to Flashing LG Optimus One back to Original Firmware

1. Turn off your cellphone
2. Press and hold Volume[+] + Power + Back buttons, until your Optimus boot in emergency mode
3. Connect LG Optimus One to PC (via USB)
   tips: maybe it`s a little strange to do, but you can try to shake the phone if it can`t detect.
4. Run KDZ_FW_UPD.exe
5. Select Type : 3GQCT
6. Select PhoneMode : DIAG
   tips: if this option failed try EMERGENCY or CS_EMERGENCY
7. At KDZ Files section, select firmware that you already download
8. Click launch software update button
   tips: someone say that it`s good idea to shake your optimus one with gently to avoid stuck.
9. Wait until it`s done, unplug the usb cable
10. Press and hold Volume[-] + HOME + Power buttons
11. See the firmware version, congratulation you did it

Do With Your Own Risk

Download Support Files

• Download LG P500 Driver (604)
• Download KDZ Updater (4share) (1133)
• Download LG Optimus One Firmware v10c singapore (802)
• Download LG Optimus One Firmware v10 europe (1304)