-Please thank him for the great work he has done for finding and executing this method originally for the Verizon G2.
-Another shout out to @rickleasa for extracting and providing the hiddenmenu.apk from the AT&T G3 rom.
So Verizon as usual has hidden some features from the stock lg rom that other variants have access to, in this case the hidden menu that is typically accessed via a code entered into the dialer. This method will unlock this option for us - though you will not be able to access it via the dialer (well, not that I know of...yet), its accessed through adb or terminal.
Step 1: Download the hiddenmenu.apk here: https://mega.co.nz/#!yUgmBRZK!Fy3Iq5...k8Q-LrTKFVFcGM or at the link at the bottom of the post. The apk is unaltered (not deodexed) from the AT&T build. The Odex file is not needed.
Step 2: Manually past the apk into system/app and set permissions to rw-r-r- using your preferred root file manager, then reboot.
Step 3: From adb: (assuming you have adb set up and operational) type adb shell (then enter), su (then enter), and enter the command, or from terminal: type su (then hit enter) to gain root, then enter the command (press enter after entering or pasting the command). Command here:
am start -a android.intent.action.MAIN -n com.lge.hiddenmenu/com.lge.hiddenmenu.HiddenMenu
-The hidden menu will then open up and your good to start breaking your phone as you see fit!!
-The most common use for this is to fix Knock-on if you ever break it (Flashing international ports has a tendency to break hardware functions). This is done by accessing the hidden menu and going to HW Device Test/Touch Test/Touch Firmware Upgrade. Wait 10 seconds after updating to see if the fix worked.
-You can do lots of damage in there so be careful!! There's also many other fun things to do as well.
If someone finds a dial code that will execute this menu after the apk is installed, please post it