Develop Bugs

[Q] Phone will not boot anymore

Ok I've been scouring these forums for solutions for the past couple days and so far everything is just getting worse.
I installed the Lifeless v14 rom using CWR in order to get Jelly Bean. However, my WiFi stopped working after getting this, after some research is seemed a lot of people were having trouble with wifi using Jelly Bean. So I installed Lifeless v11 in order to solve the WiFi problem, but instead of solving the WiFi problem my WiFi wouldn't even turn on anymore and I lost all service. Then, not knowing what was going on, I tried the Rooted Stock ZV9 rom over in the android development forums. When I try to turn my phone on now, the buttons at the bottom light up, but the screen remains blank. I can reach fastboot mode and I've reached recovery before, though I'm not sure how I did it. I finally got fastboot to detect my phone over usb, and it seems my EFS got messed up during one of these steps causing the loss of service from Sprint.
I need to get a working rom on my phone through fastboot in order to repair my EFS using the guide in the development forums. I don't want to mess it up anymore than I already have. I would appreciate any help anyone can offer.
My phone is the LG-LS970.
Thanks for everyone's time who read this post.

Ok so I have some updates on my phones status. I replaced CWM with TWRP 2.4.4.0 and then used the adb sideloader to flash stock jelly bean. Now the phone boots, but it will shut it's self down directly after booting the home screen.

If you were coming from ZV9, and went to ZVB via flash able zip. Then you probably need to install this. http://forum.xda-developers.com/showthread.php?p=38750462
Sent from my LG-LS970 using xda premium

downgrading from rooted/unlocked vzb to ics rom

First let me say ive used this site many times and never needed to post as all my questions were already answered, so for the many times ive not needed to post thank you all for being so great and helpful!!
That being said im hoping im just using the incorrect rom or going about it wrong. we switched carriers at work and my sprint lgog is sitting in a drawer while my wife uses a droid 4 on a regional carrier because they cant flash phones running JB. So for mothers day i thought i would downgrade to ICS and get this phone flashed for her. Thus far ive managed to root, unlock bootloader and fix two softbricks using teenybin's work. The softbricks came after trying to install both LS970ZV9_ODEX_STOCKROOT_1_13 and LS970ZV9_DEODEX_STOCKROOT_1_13 using twrp. I selected backup and wipe before doing both. Is there a different rom i need to use post VZB to install a ICS rom? or are these roms ok im just installing them improperly? TIA
*update* after trying to install the LS970ZV9_02.bin update with lgnpst the phone hung at 85% and upon reboot would hang at the 4glte screen, I tried teenybin unlocker again and the phone wouldnt boot at all. The lg logo would flash and then blank screen...i couldnt seem to toggle the power at all and it wouldnt even charge on wall charger. after 20 mins of frantic "oh #^#$" button pressing i finally got it to go into recovery mode and recovered back to zvb. It seems mostly back to normal now other than the wifi doesnt seem to be on even though it says its on, no emblem in notification area and wont connect to my wifi when told to.
*update2* after doing factory restore i got my wifi working properly. So i then rerooted and then reinstall teenybin with lgnpst i was able to get into twrp and restore my primary backup.... So now i THINK im back to square 1, rooted, unlocked vzb...at least everything seems to be back to normal. 3rd time is the charm which in this case means i think im going to wait to hear from someone more knowledgeable than i before i screw something up i cant fix

4th attemt 4th fail
so i tried to flash LS970ZV9_02, a totally stock unrooted, locked rom i found here on xda...i did a factory reset before booting into twrp, wiped cache and dalvik, loaded the rom and it boot looped....:crying: i dont know what im doing wrong unless these phones just refuse to downgrade....

I suggest you get on the optimus g IRC. They are very helpful. You may need to find the older radios and flash those after you downgrade. LGNPST should work, normally when it reboots at 85% its a good indication that it worked properly. Perhaps you could find a copy of the ls970zv8.bin and try to install that. Good luck.
Sent from my LG-LS970 using xda app-developers app

Phone stuck in stock recovery mode

Hi,
I have had my lg Optimus G for quite sometime now, almost since it came out. I have had it rooted since day 1 of owning it. We received the JVC firmware update, and i followed the instructions to install and re-root. It was all working just fine, wireless tether, all my root apps, ect. I went to test to see if my boot loader was still installed and i restarted my phone trying to bring up the custom recovery. It brought up the stock recovery menu. The only thing i can do now is go into stock recovery or download mode. It keeps rebooting. I just tried to LNGST but it just simply does the same thing after it reboots, it goes right back to stock recovery menu, or i can get it into download mode if its plugged in. Any suggestions on what i can try next? or is my phone completely pooched. I was using the JVB .bin during LNGST. Please any help you can provide would be awesome, this is my main means of communication.

[email protected] said:
Hi,
I have had my lg Optimus G for quite sometime now, almost since it came out. I have had it rooted since day 1 of owning it. We received the JVC firmware update, and i followed the instructions to install and re-root. It was all working just fine, wireless tether, all my root apps, ect. I went to test to see if my boot loader was still installed and i restarted my phone trying to bring up the custom recovery. It brought up the stock recovery menu. The only thing i can do now is go into stock recovery or download mode. It keeps rebooting. I just tried to LNGST but it just simply does the same thing after it reboots, it goes right back to stock recovery menu, or i can get it into download mode if its plugged in. Any suggestions on what i can try next? or is my phone completely pooched. I was using the JVB .bin during LNGST. Please any help you can provide would be awesome, this is my main means of communication.
Click to expand...
Click to collapse
A factory reset should get you going. You'll probably lose your SD with stock recovery reset though.
Sent from my LG-LS970 using XDA Premium 4 mobile app

engine95 said:
A factory reset should get you going. You'll probably lose your SD with stock recovery reset though.
Sent from my LG-LS970 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Well actually nothing in that menu worked, so i ended up trying teenybins a minute ago the stock zvb and it appears to have fixed my phone. I just reinstalled zvc on it. Im going to reroot and unlock with feegee again, i didnt unlock it last time, maybe thats what the issue was.

So i just Re-installed ZVC, and Re-rooted, and used Free-gee to gain unlock again. I have reboot several times and it looks like im good to go. Hopefully this forum will help people if they ever get the issues i did.

[Q] Optimus G Recovery Issue

I rooted my ls970 a couple months ago. I have recently unrooted my phone but ran into some issues. One, I did not unfreeze the Sprint bloatware that I had frozen when rooted. My second problem is that I have no recovery at all. I am trying to get my G back to stock but am finding it difficult since I have no recovery. Any thoughts or suggestions?

So my recovery randomly came back. I used LGNPST to get my phone back to stock. Works great!

[Q] Any hope for my bricked G Pad?

Hey all,
The other day I used my G Pad as normal, went out came back a few hours later and found all my apps to be crashing. I figured something was just acting up and a reboot would help. Rebooted, got stuck in a boot loop. Tried to factory reset, no luck. Tried using the LG Mobile Support tool, then factory resetting again, still boot looping.
It still charges, turns on, can get into download mode as well as the factory reset screen, but none of those things are getting me through this boot loop.
Prior to all this, I was running stock with root. That's it. Never flashed any ROMs or ran any crazy apps. I'm gutted this is happening after I've used numerous Android devices in the past that I rooted, ROM'd, etc. and never bricked.
Is there anything else I can try? It's out of warranty and I imagine LG repairs would cost nearly as much as a new unit caught on sale.
Appreciate any help. Thanks.

Try using smartflash tool. Not sure if it will work on the GPad but can't hurt if nothing else works
Sent from my LG-V500 using XDA Free mobile app

Symptoms are exactly what I experienced a couple of weeks ago. Like you, I tried factory resets and all options in the LG mobile support tool - no luck, it continued to boot loop. Mine was rooted but stock, like yours.
Sorry to tell you, I sent mine to LG (it was still under warranty), and they had to "replace flash RAM", according to the ticket. Very quick turnaround,and it's working perfectly now. I don't know what the process would cost you.
Hope you find a solution...this is a perfect tablet for my uses,and I'm glad to have it working again.

There is an offline LG flash tool which allow you to set up a http server and cheat the LG support tool to flash a local kdz ROM file. Since you can enter the download mode. This way definitely works. Just search the offline kdz tool in the forum.