After trying this method my phone bricked. I tried to restore it with kdz and now the only thing that happens with my phone when turning it on is download mode showing up. I don't even get the lg logo anymore. My computer won't even recognize my device and not button commands are doing anything but bringing me into a useless download mode. Its not even plugged in when it does it! help? I feel like calling Rogers and telling them I was trying to update to jb when Poofff my phone got stuck..

Sent from my SGH-I747 using xda app-developers app

Originally Posted by sshukrun

After trying this method my phone bricked. I tried to restore it with kdz and now the only thing that happens with my phone when turning it on is download mode showing up. I don't even get the lg logo anymore. My computer won't even recognize my device and not button commands are doing anything but bringing me into a useless download mode. Its not even plugged in when it does it! help? I feel like calling Rogers and telling them I was trying to update to jb when Poofff my phone got stuck..

Sent from my SGH-I747 using xda app-developers app

try again make sure
type= 3GQCT
phone mode= CS_EMERGENCY
select th kdz file
remove and reinstall the lg driver and change the usb port its connected to just to make i reinstall the drivers if its on the download mode screen its repairable no need to go to rogers you may need to flash it on another computer if all else fails and note after its done and all you get is the lg screen reboot and hold volume down and power it will show the factory reset hit power 2 times when its done it will reboot and be fine after that



IF YOU HAVE DOWNLOAD MODE SCREEN AND WINDOWS DOS NOT DETECT YOUR PHONE IT IS A DRIVER ISSUE NOT THE PHONE REINSTALL THE DRIVERS

Originally Posted by sshukrun

After trying this method my phone bricked. I tried to restore it with kdz and now the only thing that happens with my phone when turning it on is download mode showing up. I don't even get the lg logo anymore. My computer won't even recognize my device and not button commands are doing anything but bringing me into a useless download mode. Its not even plugged in when it does it! help? I feel like calling Rogers and telling them I was trying to update to jb when Poofff my phone got stuck..

Sent from my SGH-I747 using xda app-developers app

I entirely agree with kentek.

However for people who have bricked, I would say, as a customer with Rogers and I have been in the position where I have bricked my phone (gs2 LTE). I brought it in for repair giving them the story that this happened during the update process, and after a few weeks I received a new phone.

If I had re bricked my phone, I would not be afraid to do it again. All I can say, is that you better ensure that your phone is truly bricked before you send it in. I cannot tell you what the symptoms are for a full brick on the LG Optimus G but I hope you never find out.

Hope this helps.

Sent from my LG-E971 using Tapatalk 2

Originally Posted by kentek

try again make sure
type= 3GQCT
phone mode= CS_EMERGENCY
select th kdz file
remove and reinstall the lg driver and change the usb port its connected to just to make i reinstall the drivers if its on the download mode screen its repairable no need to go to rogers you may need to flash it on another computer if all else fails and note after its done and all you get is the lg screen reboot and hold volume down and power it will show the factory reset hit power 2 times when its done it will reboot and be fine after that



IF YOU HAVE DOWNLOAD MODE SCREEN AND WINDOWS DOS NOT DETECT YOUR PHONE IT IS A DRIVER ISSUE NOT THE PHONE REINSTALL THE DRIVERS

Im going to try another computer in that case because I did already reinstall the drivers, and previous to this the same USB port was indeed allowing a connection to my phone. The settings in KDZ updater was what had been mentioned in the OP. I'll give it a couple more shots before turning it in Thank you!

---------- Post added at 10:04 AM ---------- Previous post was at 09:09 AM ----------

Originally Posted by kentek

try again make sure
type= 3GQCT
phone mode= CS_EMERGENCY
select th kdz file
remove and reinstall the lg driver and change the usb port its connected to just to make i reinstall the drivers if its on the download mode screen its repairable no need to go to rogers you may need to flash it on another computer if all else fails and note after its done and all you get is the lg screen reboot and hold volume down and power it will show the factory reset hit power 2 times when its done it will reboot and be fine after that



IF YOU HAVE DOWNLOAD MODE SCREEN AND WINDOWS DOS NOT DETECT YOUR PHONE IT IS A DRIVER ISSUE NOT THE PHONE REINSTALL THE DRIVERS

Ok so the message i was getting through KDZ was "MFC Application has stopped working" and then it force closes. I read up through the LG Optimus 3D Forums and it said I had to install the msxml.msi. Turnd out it was included in your LG E971 archive so i installed it and KDZ worked. I officially have an LG logo that appeared so I will follow through with the factory Reset instructions.

I just got my LG Optimus G after a year and a half with the Samsung Infuse. I installed the OTA 4.1.2 update from Rogers the day I got my phone.

My phone says i'm running this version: E97120c. I tried RunMe, but did not get any prompts on my phone, as described. Am I doing something wrong here? USB Debugging is on, btw.

i picked up an optimus g today for a very good price - sold my note 2 today and was looking for a cheap back up phone to my galaxy tab 7.7 - i tried following these instructions with no luck, i have never had an android device i couldn't root - until now lol - anyway i gave up as i will hardly be using it anyway and updated to the 4.1.2 - e97120c ota update, i was really hoping to flash the vanilla rootbox rom and houcha kernel to see if i could get better battery life - will probably just sell the phone and pick up another nexus 4

Sent from my ASUS Transformer Pad TF700T using XDA Premium HD app

finally got it rooted, but now have another problem, the phone wont start, i was trying to go into recovery and now all that comes up is secure booting error ! cause: boot certification verify - is there a way to fix this or should i just buy another phone ?

edit, i am trying to get the kdz updater to work i do the following and then run it it looks like it working and then a couple minutes later is says failed, i tried a few times, i will try and download the kdz file again, maybe there was something wrong with the download ?

type= 3GQCT
phone mode= CS_EMERGENCY
select th kdz file

edit finally got it going again - followed the advise in this thread - reinstalled the lg drivers and also the msxml.msi everything booted up to exactly as it was before i had this problem, now to unlock and flash a rom, quick question is the jb unlock with freegee safe it gives a big warning that could brick your device - just wondering dont want to get into this issue again !!