LG无需改OP安全高效快速混刷教程（已修订）

 Just bought an unlocked AT&T V405UA I'm running on T Mobile. I've spent the last two days trying flashing and reflashing different roms and trying to root my phone and ran into the NT code errors as well. I'm now finally running V409NO30d_00_OPEN_KR_OP_0716 with Magisk root and no NT code error. Here's how I got rid of the NT code error.

You need to have root access to so you can open your /oem/OP/cust_path_mapping.cfg and a hex editor. I use HxD.

Write down the number you have in the beginning, in my case "FFFFFF,60"

Reboot into 9008, open QFil and backup your FTM by choosing "READ" option

File will be stored at C:\Users\User\AppData\Roaming\Qualcomm\QFIL\COMPORT_9

Rename file to FTM_original.bin and open in HxD

Press ctrl + G to go to offset 14000

and replace first section with number you wrote down from cust_path_mapping earlier while deleting everything after

Also, if you're missing a serial number you can add that in as well, located at offset 12000 in the FTM file

Replace the red FFFFFFFFFFFFFF with your serial #

Once done, hit "SAVE AS" so you have a backup of the original if things go wrong and rename to FTM_fixed.bin

Flash FTM_fixed.bin in QFil and reboot. Should be no more error.

• With adb from a command prompt on the computer do the following
  • 
    adb devices <-- If your devices is properly connect and recognized, adb will respond
    List of devices attached
    LMV350XXXXXXXXX device
  • 
    adb shell <-- If you have a shell into the phone you will now see
    judyp:/ $
  • 
    pm uninstall -k --user 0 com.lge.srtc <-- This command removes the root checker, if it succeeds you will get the response:
    Success
  • 
    pm uninstall -k --user 0 com.lge.mlt <-- This command removes the LG monitor, if it succeeds you will get the response:
    Success