LG Volt LS740: Device under boot-loop after I agreed to update it. Hard/soft reset didn't work My phone LG Volt LS740 asked me to update, so I did. And before it continued it said it will turn off and then start the new update. I agreed. Now my phone keeps powering off and on like crazy and won't stop until the battery is out. It keeps restarting for no reason. I tried hard reset and soft reset, but nothing works.
Following this thread should enable you to flash the stock ROM, although you'll lose all the data stored on the phone.

A quick summary:


Download files from post 11 on this thread
Install LG Flash Tool and LG Mobile Drivers
Download megalock.dll and drop it into C:\LG\LGFlashTool
Launch LG Flash Tool and select 'manually select DLL'
Select the .dll and .tot files included
Click 'Board DL' then click OK
Turn the phone all the way off, then plug a USB cable into the phone only
Plug the USB cable into the computer and immediately hold volume up
Go to Device Manager on the computer and under COM ports select the LG device and double-click it
Click Port Settings, click advanced, click COM port and set port to 41
In LG Flash Tool click the arrow in the top-left to run an MD5 check
Once it finishes, hold power until black screen then hold volume up
If a menu appears on the phone when booting up, hold power, click normal boot and OK