Make sure you have ADB properly established in you system path.
Plug in your phone to your PC. Then open up a command prompt. Type in cd..
Then type in cd.. again. You should be at the root of your C drive.
Type in adb devices. You should see "list of devices attached " and a long series of numbers. If you see this you can proceed. If you get anything like " adb is not a recognized internal or external command, operable program or batch file then you need to go here
New pre-packaged ADB installation unplug your phone and install uSD card.
Now go here
https://github.com/inferiorhumanorgans/android_device_lge_thunderc/wiki/Binary and download either the xionia recovery version 1.2518.6 or the new BobZohme recovery found here
VM670NH_recovery.img. Make sure you put the recovery(unzipped)on the root of your uSD card after you have renamed it "recovery.img". Also download the ROM and Gapps and put them on the root of the uSD card,but leave them zipped. Put uSD card back in phone. Plug phone into PC and check again.
If your good then type in cd cls, this should clear your screen but still leave you in the root of your C drive.
Next type in cd SDK/platform-tools.
Then type in: su(return) mount(sp)-o(sp)remount,rw(sp)-t(sp)yaffs2(sp)/system(sp)/system(return)flash_image(sp)recovery(sp)/sdcard/recovery.img(return) reboot(sp)recovery(return)
(sp)=this is where the spaces should be. Do not type this in.
(return)=Do not type this in just hit the return key.
You should now be in your recovery. To scroll use the up/down volume keys. If you have chosen the BobZohme recovery try the camera key to select an option or either the menu key or the home key. If you flashed xionia recovery try either the home key or menu key(if you choose one and it makes the screen go blank just hit it again and then use the other). This first thing(and most important) you need to do is go to the backup and restore section and select backup(this will make a backup of your current system in case you make a mistake with the ROM install).
Now you need to do all these things(this must be done when installing a new ROM or restoring a backup) 1.wipe cache partition. 2.wipe dalvik cache(advanced section) 3.wipe data/factory reset.Now that your rooted YOU MUST NEVER USE THE FACTORY RESET IN THE PRIVACY MENU ON THE PHONE 4.format boot,system,data,and cache 5.go to install zip from sd card 6.go to select zip from sd card,chose the ROM first. It will go thru the install procedure. When done go back to step 6. and select the gapps. When all this is done select reboot system now.
It will take 5-10min.for the initial reboot. If you installed a Gingerbread ROM You will be asked to sign in,skip this.
Now you can go to the market app and click on it and sign in to your google account(you must have your e-mail address and log in code).Reboot the phone twice then set up your apps. Once you get everything set up just the way you like it and all your apps are just where you want them,go back into your recovery and make a backup of that ROM. You can now delete the first backup if you need to (you might keep it if you ever need to revert back to stock to sell the phone).
If you want to install a theme all you have to do is go into the recovery and wipe cache partition and dalvik cache,then do the same thing you did to install the ROM(theme must remain zipped) When you need to install an update to an installed ROM,all you have to do is wipe cache,and dalvik.
To change the boot animation if you are rooted(must remain zipped) go to /system/media(make sure that you have changed permission of the system from r/o to r/w) and delete the boot animation found there. Then copy the boot animation you have on the sd card and paste it where the old animation used to be(on next reboot it will be there). If your not roooted use ROMTools.
If your get a # after su you phone is properly rooted.
Next type in