I am at home now!
Download
this and extract it.
Do the
Preparation part from
here. Note: to make LG flashtool work, you have to copy the MegaLock.dll from the crack folder to C:\LG\LGFlashTool. Skip the part where I ask you to download DLL and Firmware, because we are going to use the dll, and the firmware from the recovery.rar.
Now move on to the
Flashing the firmware part. As DLL you have to select
LGUP_8974.dll from the recovery folder, and as S/W you have to select the
recovery.tot file from the recovery folder. Ensure that
UPGRADE DL is selected in the
Action Mode section.
Click on OK, then click on the yellow arrow to start the process. Reconnect your device (unplug and plug it again) when you see the
READY!! text at COM41.
Now here comes the part where you have to be careful. After the reconnection make sure you press the volumde_down buttom until the flashing process finishes and the phone restarts to fastboot, or every user data on your phone will be wiped (download apps, every file on your sdcard).
When you are in fastboot, select reboot recovery and lets see what happens.
After the flashing please open
8974_COM41.log file which are in the
LOG folder, where the DLL and the recovery.tot are, and search for this text:
device factory version
If device factory version is
LGD821AT-00-V10b-NXS-XX-OCT-31-2013-KRT16M-USER-16G+0, then we are okay. If it is not then, tell the correct device factory version, and I will modify the recovery.tot to use your original device factory version in order to restore it.