For whatever reasons (improper rooting/flashing, power outage during updating, freezing/removal of LG bloatwares or simple bad luck etc), if you bricked your Optimus G and is stuck with a Security Error or in a bootloop, fear not, as long as you can put it into Download and Recovery Mode, all is not lost. I got the korean version of the (almost) Optimus G (Optimus LTE2, f160k) and ran into the same security error problem that happened out of the blue. The steps that I undertook below resolved the problem for me and has been proven to work on Optimus G by fellow members.For whatever reasons (improper rooting/flashing, power outage during updating, freezing/removal of LG bloatwares or simple bad luck etc), if you bricked your Optimus G and is stuck with a Security Error or in a bootloop, fear not, as long as you can put it into Download and Recovery Mode, all is not lost. I got the korean version of the (almost) Optimus G (Optimus LTE2, f160k) and ran into the same security error problem that happened out of the blue. The steps that I undertook below resolved the problem for me and has been proven to work on Optimus G by fellow members.
Requirement
1) Download the latest KDZ from LG's server for your phone
2) Make sure you have LG United Drivers installed, otherwise download from below
3) Download LG KDZ Updater
4) Download the manual adb wipe batch file
2) Make sure you have LG United Drivers installed, otherwise download from below
3) Download LG KDZ Updater
4) Download the manual adb wipe batch file
How to do
1) Put your optimus g into download mode by switching it off, attaching the usb cable to the phone, holding both the up and down volume buttons at the same time and lastly inserting the usb cable into the computer; wait for the drivers to load if doing it for the first time.
2) Unzip the downloaded updater zip file and run KDZ_FW_UPD.exe. Use the settings below
Type: 3GQCT
Phone Mode: CS_Emergency
KDZ file: navigate to the folder which you have saved the downloaded KDZ from the first step
Click Launch Software Update and wait for the flash process to finish
3) Your phone will restart itself when IParam = 90 is displayed and proceeds slower until you see IParam=1 again (end of flash, you can safely exit the program then). If phone boots up normally, congrats, skip the steps below and proceed to use the phone as per normal.
4) If the phone is stuck at the booting up LG/Telco logo, you will need to manually wipe the data partition.
5) Force the phone off by holding the power button for appx 15secs
6) Put the phone into recovery mode by holding the volume up and home button concurrently, then press the power button. Let go of all the buttons after you see the LG logo on screen for the 2nd time and the screen goes blank thereafter (backlight may be on). The boot will kind of reboot and enters the recovery mode. Repeat the process if you did not get it the first time.
7) Connect the phone to the computer, wait for the drivers to load (if doing it for the first time), unzip the wipe batch file downloaded earlier from step 4, double click on wipe.bat.
8) Your phone will auto reboot when wiped and hopefully it will boot as per normal.
Source[ xda ]
2) Unzip the downloaded updater zip file and run KDZ_FW_UPD.exe. Use the settings below
Type: 3GQCT
Phone Mode: CS_Emergency
KDZ file: navigate to the folder which you have saved the downloaded KDZ from the first step
Click Launch Software Update and wait for the flash process to finish
3) Your phone will restart itself when IParam = 90 is displayed and proceeds slower until you see IParam=1 again (end of flash, you can safely exit the program then). If phone boots up normally, congrats, skip the steps below and proceed to use the phone as per normal.
4) If the phone is stuck at the booting up LG/Telco logo, you will need to manually wipe the data partition.
5) Force the phone off by holding the power button for appx 15secs
6) Put the phone into recovery mode by holding the volume up and home button concurrently, then press the power button. Let go of all the buttons after you see the LG logo on screen for the 2nd time and the screen goes blank thereafter (backlight may be on). The boot will kind of reboot and enters the recovery mode. Repeat the process if you did not get it the first time.
7) Connect the phone to the computer, wait for the drivers to load (if doing it for the first time), unzip the wipe batch file downloaded earlier from step 4, double click on wipe.bat.
8) Your phone will auto reboot when wiped and hopefully it will boot as per normal.
Source[ xda ]
Posted by: Mr. Cheang Sovan
Tel: 015419789 / 093354161
Note: I'm not responsibility if your phone was broken or had any problems. DO it with your own risk.
