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I have rooted my Telus LG Optimus LTE (P935) successfully.
It is just the CyanogenMod 10.1 recovery image that isn't working for me.
I get the
Code:
---------------
Secure booting Error!
Cause : boot certification verify
-------------------------
------------------------------
Enter the fastboot...
Enter the fastboot...
Long time no see!
-------------------------------------------------
message when I boot to recovery.
Is there a simple fix for this i.e. use an different Cyanogen Mod, or my phone isn't really rooted at all and I think it is, or...?
The phone boots into the Telus ICS just fine, works ok and all, but if I want the thing to be upgradeable over time, I think I don't want to just rely on Telus to keep it up to date, do I?
lorax1284 said:
I have rooted my Telus LG Optimus LTE (P935) successfully.
It is just the CyanogenMod 10.1 recovery image that isn't working for me.
I get the
Code:
---------------
Secure booting Error!
Cause : boot certification verify
-------------------------
------------------------------
Enter the fastboot...
Enter the fastboot...
Long time no see!
-------------------------------------------------
message when I boot to recovery.
Is there a simple fix for this i.e. use an different Cyanogen Mod, or my phone isn't really rooted at all and I think it is, or...?
The phone boots into the Telus ICS just fine, works ok and all, but if I want the thing to be upgradeable over time, I think I don't want to just rely on Telus to keep it up to date, do I?
Click to expand...
Click to collapse
You have to unbrick; final answer. No other way around it. Just pick one of the numerous guides here in the general section and follow it.
Unbrick? But it's not bricked...
lordcheeto03 said:
You have to unbrick; final answer. No other way around it. Just pick one of the numerous guides here in the general section and follow it.
Click to expand...
Click to collapse
Thanks for that, but I just want to confirm that even though I have superuser installed and working, and ClockWorkMod is installed and working, and when I boot the device normally it loads up into Ice Cream Sandwich just fine, and everything works great, I STILL have to follow a full "Unbrick" procedure just to get a "proper" recovery.img onto the device?
I'm not afraid of ADB / command line, but if you say "do the unbrick", well, OK, but could you recommend a SPECIFIC guide? The one I used to get where I am is this one:
http://forum.xda-developers.com/showthread.php?t=1554255
as recommended in this post:
Root Telus P935? post #13
So could you advise if I should retry that method or if I should try a different method, which one might be most likely to leave me with a LG Optimus LTE with a more-current version of Android than 4.0.4, AND leave the device with the ability to update to subsequent Android releases (either stock or Cyanogen?)
I am just trying to avoid a lot of fruitless trial and error if there's a known "best way" to do what I'm trying to do.
lorax1284 said:
Thanks for that, but I just want to confirm that even though I have superuser installed and working, and ClockWorkMod is installed and working, and when I boot the device normally it loads up into Ice Cream Sandwich just fine, and everything works great, I STILL have to follow a full "Unbrick" procedure just to get a "proper" recovery.img onto the device?
I'm not afraid of ADB / command line, but if you say "do the unbrick", well, OK, but could you recommend a SPECIFIC guide? The one I used to get where I am is this one:
http://forum.xda-developers.com/showthread.php?t=1554255
as recommended in this post:
Root Telus P935? post #13
So could you advise if I should retry that method or if I should try a different method, which one might be most likely to leave me with a LG Optimus LTE with a more-current version of Android than 4.0.4, AND leave the device with the ability to update to subsequent Android releases (either stock or Cyanogen?)
I am just trying to avoid a lot of fruitless trial and error if there's a known "best way" to do what I'm trying to do.
Click to expand...
Click to collapse
I haven't asked and I am only assuming that you are on an official version of ICS, right? If that is the case, it is fully possible to have root privs yet fail to flash a working recovery.
The thing is; if you are trying for a custom recovery, such as TWRP or CWM, then most assuredly you must unbrick. On the official ICS releases, having root privs means nothing as far as flashing a custom recovery is concerned.
Flashing a custom recovery+ROM will not hinder your ability to update either your custom ROM or upgrade to any (unlikely) future LG update.
As for which method is best, I personally say that ANY of them work as I have tried each one listed on this board and have encountered not one single problem. My personal recommendation is Hereric's guide, but in general, they all do just about the same thing. Other members do not share my "luck" as problems have been experienced with each method. The most important thing is to read through the guide a few times before starting it. One thing I will recommend is that since you have a P935, whichever method you choose, make sure you use a P93x .kdz instead of the Korean SU640 .kdz. I mean, it will work with either one, but there are a few minor gremlins that can pop up if you use the SU640 .kdz to unbrick.
lordcheeto03 said:
I haven't asked and I am only assuming that you are on an official version of ICS, right? If that is the case, it is fully possible to have root privs yet fail to flash a working recovery.
Click to expand...
Click to collapse
Yes, the official Telus ICS. It was installed using the Windows LG upgrade tool.
lordcheeto03 said:
On the official ICS releases, having root privs means nothing as far as flashing a custom recovery is concerned.
Click to expand...
Click to collapse
That is what I was looking for confirmation of... I will unbrick.
lordcheeto03 said:
Flashing a custom recovery+ROM will not hinder your ability to update either your custom ROM or upgrade to any (unlikely) future LG update.
As for which method is best, I personally say that ANY of them work as I have tried each one listed on this board and have encountered not one single problem. My personal recommendation is Hereric's guide, but in general, they all do just about the same thing. Other members do not share my "luck" as problems have been experienced with each method. The most important thing is to read through the guide a few times before starting it. One thing I will recommend is that since you have a P935, whichever method you choose, make sure you use a P93x .kdz instead of the Korean SU640 .kdz. I mean, it will work with either one, but there are a few minor gremlins that can pop up if you use the SU640 .kdz to unbrick.
Click to expand...
Click to collapse
Thanks very much for this detailed response... I'll get to it this evening and post back when I've done it.
Cyanogenmod 10.1 now stuck at boot screen
I have got Cyanogen 10.1 installed, now it's stuck on the cyan (I just got that!) boot logo (the circle with the hexagon screen with the moving spokes) and left it in that state far longer than should have been necessary for first boot... should I not have used 10.1?
lorax1284 said:
I have got Cyanogen 10.1 installed, now it's stuck on the cyan (I just got that!) boot logo (the circle with the hexagon screen with the moving spokes) and left it in that state far longer than should have been necessary for first boot... should I not have used 10.1?
Click to expand...
Click to collapse
Shouldn't matter which ROM you install. I'd wipe everything and try it again; or try a different ROM. You should be good to go once you've unbricked.
first boot with cm 10.1 will take about 10 minutes if i remember right, its probly not stuck on logo, just wait and let it install., if u leave it on logo for 30 min and its not booted redownload/flash it again.
Thanks; managed to get it installed
KronicSkillz said:
first boot with cm 10.1 will take about 10 minutes if i remember right, its probly not stuck on logo, just wait and let it install., if u leave it on logo for 30 min and its not booted redownload/flash it again.
Click to expand...
Click to collapse
I had to flash / boot a few times... another tip is that in order for the "boot to recovery" to work, you first have to do a full wipe: once I realized that I was able to get various cyanogenmod firmwares onto the device and if I had problems, had to do a wipe then I could use the recovery firmware to try another.
I restored my stock backup and allowed the phone to do the ZVC update. In the past this always failed for some reason. This time it failed but I am now stuck in a continuous loop, always boots to CWM.
I'm pretty good about following instructions if someone could just point me in the right direction. I installed the Android SDK, hoping that would give me ADB and I could sideload but I'm just spinning my wheels and dont know where to start.
I have tried to restore a backup and also tried to install a rom, neither gets me past CWM.
ok, after some research, I installed a driver for my phone and now adb is working with my phone. Might have wasted my time with the SDK, dont know.
I tried flashing the ZVC radio but I'm still stuck in the CWM boot loop.
Well I've tried to flash everything I could find but nothing works, always boots to recovery. Ready to take a hammer to this phone!
cardboardbox said:
I restored my stock backup and allowed the phone to do the ZVC update. In the past this always failed for some reason. This time it failed but I am now stuck in a continuous loop, always boots to CWM.
I'm pretty good about following instructions if someone could just point me in the right direction. I installed the Android SDK, hoping that would give me ADB and I could sideload but I'm just spinning my wheels and dont know where to start.
I have tried to restore a backup and also tried to install a rom, neither gets me past CWM.
Click to expand...
Click to collapse
Have you tried this method? It helped me when I tried to undo the changes from freegee. If your phone has a working rom on it you can use this method if it wont boot. I basically messed up the recovery on mine and this fixed it.
http://forum.xda-developers.com/showthread.php?t=2230106
Once you get a recovery on your phone you can flash a rom if it still wont boot. If you want stock you can flash the zvc stock rom here: http://forum.xda-developers.com/showthread.php?t=2536636
dopy25 said:
Have you tried this method? It helped me when I tried to undo the changes from freegee. If your phone has a working rom on it you can use this method if it wont boot. I basically messed up the recovery on mine and this fixed it.
http://forum.xda-developers.com/showthread.php?t=2230106
Once you get a recovery on your phone you can flash a rom if it still wont boot. If you want stock you can flash the zvc stock rom here: http://forum.xda-developers.com/showthread.php?t=2536636
Click to expand...
Click to collapse
wow that was really easy! Thanks! Now I have TWRP 2.6 instead of the CWM I was using but no complaints as long as it works.
I still cant get the stock rom to upgrade OTA. After it downloads the Production ZVB to ZVC update (about 92mb) it tries to install it but always fails. I tried flashing the stock ZVC rom that can be found in the android dev sub forum but I had no data access even after selecting activate this device in settings. Any ideas?
cardboardbox said:
wow that was really easy! Thanks! Now I have TWRP 2.6 instead of the CWM I was using but no complaints as long as it works.
I still cant get the stock rom to upgrade OTA. After it downloads the Production ZVB to ZVC update (about 92mb) it tries to install it but always fails. I tried flashing the stock ZVC rom that can be found in the android dev sub forum but I had no data access even after selecting activate this device in settings. Any ideas?
Click to expand...
Click to collapse
You can find the zvc radio in the same place. Flash that since you were never on zvc. Or try restoring your EFS if everything is blanked out in about device of your settings.
Also since you have a working phone now, I like philz recovery. Flash it from inside twrp. At the moment I'm using a modified twrp to multi boot a few different ROMs but that's a little more advanced.
dopy25 said:
You can find the zvc radio in the same place. Flash that since you were never on zvc. Or try restoring your EFS if everything is blanked out in about device of your settings.
Also since you have a working phone now, I like philz recovery. Flash it from inside twrp. At the moment I'm using a modified twrp to multi boot a few different ROMs but that's a little more advanced.
Click to expand...
Click to collapse
yeah I did get the zvc radio but flashing it doesnt give me data when combined with the stock zvc rom. When flashing the ZVC radio I can see its labelled as ZVB but that might just be leftover from the previous flashable radio.
At this point I just need to figure out how to go back to the stock recovery and unroot so I can get OTA updates.
cardboardbox said:
yeah I did get the zvc radio but flashing it doesnt give me data when combined with the stock zvc rom. When flashing the ZVC radio I can see its labelled as ZVB but that might just be leftover from the previous flashable radio.
At this point I just need to figure out how to go back to the stock recovery and unroot so I can get OTA updates.
Click to expand...
Click to collapse
Why do you need the OTA? You now have the updated radio and ROM. ZVB radio is labeled ZVC and ZVC is the most current software. The ROM you just flashed is bone stock.
Now it's just a matter of getting data to work. Are all the numbers zeroed out? Also when you unlocked you should have an EFS backup to restore with.
Sent from my LG-LS970 using XDA Premium 4 mobile app
engine95 said:
Why do you need the OTA? You now have the updated radio and ROM. ZVB radio is labeled ZVC and ZVC is the most current software. The ROM you just flashed is bone stock.
Now it's just a matter of getting data to work. Are all the numbers zeroed out? Also when you unlocked you should have an EFS backup to restore with.
Sent from my LG-LS970 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Agreed. At this point there's no ota in sight over ZVC.
thanks for the help guys. Data works now, it was just real spotty at first. I kept trying "activate this device" until it finally worked consistently. I am concerned that it seems to lose data connection more often than before but I'd think if I flashed something wrong, or flashed the wrong radio, it wouldnt work at all, right? It wouldnt just be kind of crappy?
I'm sitting here at my desk watching the phone go from 3g to nothing to 3g to nothing, repeatedly. Changes at least once a minute.
cardboardbox said:
thanks for the help guys. Data works now, it was just real spotty at first. I kept trying "activate this device" until it finally worked consistently. I am concerned that it seems to lose data connection more often than before but I'd think if I flashed something wrong, or flashed the wrong radio, it wouldnt work at all, right? It wouldnt just be kind of crappy?
I'm sitting here at my desk watching the phone go from 3g to nothing to 3g to nothing, repeatedly. Changes at least once a minute.
Click to expand...
Click to collapse
Try going to Settings>More>Mobile networks>Network mode and tick CDMA. See if that helps. If it does and you want LTE, you'll need to do this every time. Just tick CDMA/LTE instead.
Sent from my LG-LS970 using XDA Premium 4 mobile app
engine95 said:
Try going to Settings>More>Mobile networks>Network mode and tick CDMA. See if that helps. If it does and you want LTE, you'll need to do this every time. Just tick CDMA/LTE instead.
Sent from my LG-LS970 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
It also sounds like a prl update is in order. But yes if you're not in an LTE area make due to check CDMA only because I have the same problem. Lose data like crazy when LTE/CDMA is selected. Have semi solid connection when only CDMA is selected.
Try updating prl and profile under system updates on stock.
When you do that, it'll put it back to LTE if it has weak service. So you might have to go back into Settings and make it CDMA again.
Sent from my LG-LS970 using XDA Premium 4 mobile app
engine95 said:
When you do that, it'll put it back to LTE if it has weak service. So you might have to go back into Settings and make it CDMA again.
Sent from my LG-LS970 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Yeah, every time I flash a rom I change to cdma only. I am nowhere close to an lte area, the closest is 30+ miles away in any direction. LTE kills my battery because it is always searching for LTE. Kind of sucks to get 4G back when I am actually in a market for it. But that shouldn't be a problem since I have been using the multiboot. What I had to do before was restore a stock backup and get a 4G lock after updating profile and prl, then restore the rom I want and I would have 4G.
Everything has been running pretty smooth for the past week but there is one issue that seems to be getting worse. When I turn on my phone I see the LG logo and then a blank, black screen with the backlight on. It will stay like this forever until I hold down the power button long enough to make the phone turn off. A week ago this happened occasionally but now its happening almost every time. In fact, today I cant get past it.
Any ideas?
cardboardbox said:
Everything has been running pretty smooth for the past week but there is one issue that seems to be getting worse. When I turn on my phone I see the LG logo and then a blank, black screen with the backlight on. It will stay like this forever until I hold down the power button long enough to make the phone turn off. A week ago this happened occasionally but now its happening almost every time. In fact, today I cant get past it.
Any ideas?
Click to expand...
Click to collapse
Try going to recovery and wiping cache. It won't clear any data if you don't select data. Try that and a reboot.
Are you still using stock? If so is it totally stock or do you have a custom kernel? <<< just curious, it shouldn't be relevant.
EDIT: did you use this thread to get stock? http://forum.xda-developers.com/showthread.php?t=2536636
@engine95 will correct me if I'm wrong but use the newest section,
the ont that says
New March 2 2014
New ZVC with all LG markings, kernel also. Only difference is it's rooted. YOU DO NOT HAVE TO UPDATE, unless you want to. With this, if you re-lock and then remove root, you will have a factory looking phone.
It is also zipaligned
New Download
Here's the Stock LG flashable kernel. All LG Markings
LG Stock Kernel
Click to expand...
Click to collapse
cardboardbox said:
Everything has been running pretty smooth for the past week but there is one issue that seems to be getting worse. When I turn on my phone I see the LG logo and then a blank, black screen with the backlight on. It will stay like this forever until I hold down the power button long enough to make the phone turn off. A week ago this happened occasionally but now its happening almost every time. In fact, today I cant get past it.
Any ideas?
Click to expand...
Click to collapse
Everything dopy25 said above ^^^^^^
I remember this happening in the past, but I not sure of the cure.
Either you need to wipe everything, SD included, and restore or start fresh.
Or
Its your unlock. You said you have the LG logo and that unlock will eventually go bad. You need to use the mako unlock, I think it's called. It'll have the Google logo on boot up.
All of our phones will need to use this unlock sometime, so that's the one Shelnutt2 recommends.
Read about it in the root guide.
Sent from my LG-LS970 using XDA Premium 4 mobile app
engine95 said:
You said you have the LG logo
Click to expand...
Click to collapse
I use the ZCV ROM zip in your post I as my stock so I can update prl, and Everytime it boots I see the the Google unlock screen, the LG logo, then the sprint logo and 4G animation stuff.
I also use the multi boot method so it is actually a secondary rom that way I don't have to flash over just to update PRL, could that have something to do with it?
dopy25 said:
Try going to recovery and wiping cache. It won't clear any data if you don't select data. Try that and a reboot.
Are you still using stock? If so is it totally stock or do you have a custom kernel? <<< just curious, it shouldn't be relevant.
EDIT: did you use this thread to get stock? http://forum.xda-developers.com/showthread.php?t=2536636
@engine95 will correct me if I'm wrong but use the newest section,
the ont that says
Click to expand...
Click to collapse
Yes I used that thread. I also got the ZVC radio from the link at the top of that thread. When I flashed it I saw in the text that scrolls up during the flash that it was labelled ZVB radio. I still wonder about that...
I'm still stock, no custom kernel.
I went to recovery, but the first time I tried I did it wrong and the phone booted up normally for the first time today. I then wiped cache and restarted the phone 5 times without it getting stuck. If it was cache, does this tell you anything? Will I have to wipe it once a week?
engine95 said:
Everything dopy25 said above ^^^^^^
I remember this happening in the past, but I not sure of the cure.
Either you need to wipe everything, SD included, and restore or start fresh.
Or
Its your unlock. You said you have the LG logo and that unlock will eventually go bad. You need to use the mako unlock, I think it's called. It'll have the Google logo on boot up.
All of our phones will need to use this unlock sometime, so that's the one Shelnutt2 recommends.
Read about it in the root guide.
Sent from my LG-LS970 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Well dopy25's suggestion seems to have worked.
I'll read up about the mako unlock but maybe there is something weird about my phone. When I turn it on a normal boot goes like this:
1. LG logo for maybe .5 second or less
2. black screen with backlight on
3. black screen without backlight
4. LG logo again for 1 sec
5. Sprint animated 4GLTE logo
6. Done
1 through 4 are kind of strange. Maybe I should just have one LG logo?
cardboardbox said:
Yes I used that thread. I also got the ZVC radio from the link at the top of that thread. When I flashed it I saw in the text that scrolls up during the flash that it was labelled ZVB radio. I still wonder about that...
I'm still stock, no custom kernel.
I went to recovery, but the first time I tried I did it wrong and the phone booted up normally for the first time today. I then wiped cache and restarted the phone 5 times without it getting stuck. If it was cache, does this tell you anything? Will I have to wipe it once a week?
Well dopy25's suggestion seems to have worked.
I'll read up about the mako unlock but maybe there is something weird about my phone. When I turn it on a normal boot goes like this:
1. LG logo for maybe .5 second or less
2. black screen with backlight on
3. black screen without backlight
4. LG logo again for 1 sec
5. Sprint animated 4GLTE logo
6. Done
1 through 4 are kind of strange. Maybe I should just have one LG logo?
Click to expand...
Click to collapse
You shouldn't have to occasionally wipe cache (I think), the reason I suggested it is because I was unsure if you did when you flashed the zip the first (last) time. However it doesn't hurt as far as I know to wipe cache, it will basically refresh all the apps and junk on your phone and be a clean boot but still have all your apps installed.
As far as the 2 LG logo's at boot, that very well could be what engine95 was talking about when he said you might be on the old/temp unlock method. But I think you should be on the good unlock if you used the teeny bin.
Is there a nandroid backup for the Canadian LG G3? If not then how are you guys keeping your phone safe?
TWRP now available ?
gsw5700 said:
TWRP now available ?
Click to expand...
Click to collapse
Frikin A
Tricky
Had a lot of issues almost bricked my phone trying to use twrp D852 Bump
Found that using LGFlashTool to flash stock (unbranded) KitKat Firmware helped and using twrp 2.8.0.0 worked right away.
My phone crashes every other day, i ****ing hate it because one time it almost got stuck in bootloop, and now eveey time it crashes i get an anxiety attack i might be left with a $700 brick
Anyway ive never had any problem with twrp, but I had always thought it made a full back up.
Turns out this isnt true, and the storage partition is left untouched?
So if i go to an older backup i will find newer photos and folders ive created all there, so this makes me ask, what is it NOT safe to fool around with considering certain information will remain even if you switch backups?
Recently, I have been introduced to Android Rooting and I have successfully rooted my phone with Towelroot. My friend installed Cyanogenmod 11 on his Galaxy S3 the other day and I have been having many problems doing the process myself. I have ripped xdadevelopers to pieces trying to find a solution, but nothing has ever been simple enough, well really efficient enough to fix my problem.
I have ROM Manager installed on my device and the latest CWM Recovery and when I get to the "Recovery" mode it does not give me all the options a normal "Recovery" screen would give me. I can not backup my current stock rom because there is no option. In doing this I accidentally wiped my phone and had no way to recover, so I lost a lot of temporary things, very frustrating.
Basically what I need to know is how to get CWM Recovery to work on my device, etc. Also I forgot to mention before that FreeGee messes up too. It says something about "loki" or something. I am sick of trying several methods that fail in the end. If you can tell me how to get CWM Recovery to work on my phone. I do have an SD Card and my phone is rooted. Please help me! I apologize if all the information is not present, but if you need to know anything specific I would be more than happy to answer your question!
RyeM8 said:
Recently, I have been introduced to Android Rooting and I have successfully rooted my phone with Towelroot. My friend installed Cyanogenmod 11 on his Galaxy S3 the other day and I have been having many problems doing the process myself. I have ripped xdadevelopers to pieces trying to find a solution, but nothing has ever been simple enough, well really efficient enough to fix my problem.
I have ROM Manager installed on my device and the latest CWM Recovery and when I get to the "Recovery" mode it does not give me all the options a normal "Recovery" screen would give me. I can not backup my current stock rom because there is no option. In doing this I accidentally wiped my phone and had no way to recover, so I lost a lot of temporary things, very frustrating.
Basically what I need to know is how to get CWM Recovery to work on my device, etc. Also I forgot to mention before that FreeGee messes up too. It says something about "loki" or something. I am sick of trying several methods that fail in the end. If you can tell me how to get CWM Recovery to work on my phone. I do have an SD Card and my phone is rooted. Please help me! I apologize if all the information is not present, but if you need to know anything specific I would be more than happy to answer your question!
Click to expand...
Click to collapse
Have you tried installing the recovery from G.Pro Recovery first? Freegee will not work for me, giving me similar errors, until I first do that. See the to the Bountyman G3 v4.x thread under 'Optimus G Pro Android Development' for more info. Works for me every time (though I choose TWRP; friggin' *hate* CWM).
Hello people, I don't know if there's anyone out there who still uses the G pro but here I am still using it. Okay so I have been stuck with this problem for almost 2 months now, I rooted my phone amd everything was great till the time I tried to install a custom recovery using freegee. It did not work. In the beginning, it said my phone wasn't compatible because of some loki thing but I still went ahead with it anyway.
So after I installed the 2nd-init recovery, after I rebooted, things went bad. My phone was okay, sort of. The main problem was that my memory card stopped working and my phone began changing settings itself like turning the wifi off, screen on changes to 15 seconds and it keeps doing this again and again and I have to keep changing the settings.
Can somebody please help me fix this issue as I really can't take this anymore. I cant use my phone properly any longer. Oh and my phone is still under warranty but m scared to give it in as I feel they might find out it was rooted. Is there anyway I can get back to the old recovery and remove this 2nd init file? i can locate the file bt im scared to delete it as i wouldnt wanna wreck my phone any further.
Any help would be appreciated.
Sent from my LG-E988 using XDA Free mobile app
Restore to stock first. 2nd-init recoveries are very hard to remove without extensive knowledges on linux shell.
They you can re-root the phone. If your phone supports the 'LG Support Tool', then use it. It will recover your phone to stock in clean and nice GUI.
I tried the lg support tool. It just keeps stopping.
I'm not really good at this. I restored to stock by performing a factory reset but Im just lost at this point. Can I give it in for servicing because its still under warranty?
Sent from my LG-E988 using XDA Free mobile app
Sir,
Please wait until mods will move this thread to the device specific forum for more relevant answers.
Stand by
Good luck
I don't know about lg support tool, but the best thing will be use lg flash tool, there are many thread on how to flash the img files. You can flash the recovery that way. Or you can flash your device back to stock rom 4.12 which is the best starting point.