Make sure you have KDZ file
KDZ file can be a test version, which can be the official version, the version can also be a CSE
step 1
LG Android phones to download and install drivers
http://tool.xcdn.gdms.lge.com/dn/do..._S50MAN310AP22_ML_WHQL_Ver_3.10.1_3.9.1.0.zip
Download FlashTool.1.0.54_lgbbs.net.rar, then extract
http://www.lgbbs.com:41/Tool/FlashTool.1.0.54_lgbbs.net.rar
step 2
Installation "B2CAppSetup.exe"
Its location in: “FlashTool.1.0.54_lgbbs.net\KDZ_FW_UPD_EN\B2CAppSetup.exeâ€
After installation is complete, it will automatically open "LGMobile Support Tool"
Please manually close "LGMobile Support Tool"
step 3
The phone into "download mode"
Enter "download mode", check your computer's Device Manager to check there are no LG COM port is displayed
step 4
Open the computer's "C:\Windows\System32\drivers\etc" folder
Open the "hosts" file in Notepad
Add a message: 127.0.0.1 csmg.lgmobile.com
step 5
Copy "FlashTool.1.0.54_lgbbs.net\LGMOBILEAX" all of the following files to the "LGMobile Support Tool" installation directory
Tip:If you do not know "LGMobile Support Tool" installation directory where you can find "LGMobile Support Tool" Right click on your desktop, select "Properties",
then click "Open File Location", will enter the "LGMobile Support Tool "the installation directory
step 6
Open the folder "FlashTool.1.0.54_lgbbs.net"
Open http.exe, after opening Minimize
Then open UpTestEX.exe
step 7
flashing...
step 8
Wait for the phone to display LG LOGO, prove that they have completed flashing
Of course, you can also wait for 100% completion
step 9
After the flashing is complete, turn off the "UpTestEX.exe"
Exit "http.exe"
Use Notepad to open the "hosts" file, delete "127.0.0.1 csmg.lgmobile.com"