Database Users

Rooting OTA VS980B

Anyone figure out how to root the new OTA? It wont allow root with the old flash way since its new OTA

timenewton said:
Anyone figure out how to root the new OTA? It wont allow root with the old flash way since its new OTA
Click to expand...
Click to collapse
Yes use the new IOROOT15 to root the device. But I have been unsuccessful in flashing any roms, however I did get twrp to work with FreeGee app in the android market.

I appreciate your help very much, thank you

jea508 said:
Yes use the new IOROOT15 to root the device. But I have been unsuccessful in flashing any roms, however I did get twrp to work with FreeGee app in the android market.
Click to expand...
Click to collapse
What version of twrp? Sounds like you may need to update.
Sent from my LG-D800

btm fdr said:
What version of twrp? Sounds like you may need to update.
Sent from my LG-D800
Click to expand...
Click to collapse
Im still using the twrp that was flashed with freegee. i'm a newb to all this. Maybe i should flash new version of twrp and try. I was trying to install the mal 4.2.2 rom and just got lg screen, then black.

jea508 said:
Im still using the twrp that was flashed with freegee. i'm a newb to all this. Maybe i should flash new version of twrp and try. I was trying to install the mal 4.2.2 rom and just got lg screen, then black.
Click to expand...
Click to collapse
I've been unsuccessful in getting any roms to work. I tried 4.2.2 rom and got lg screen then black, had to restore nand backup from twrp recovery but it was hellish to get into, had to do the hold vol+pwr precisely, almost gave up. So, reverted to a backup just fine.
Next tried to loki_flash recovery 2.6.3.1 (then was going to do them in order-2.6.3.2>2.6.3.3 [have not tried going directly to 2.6.3.3) and was hit with an unsupported aboot error (device mismatch).
So now i'm going to try and use flash tool to revert back to 11A, root, install twrp (I hope this is possible and I don't brick my phone [i'm new to all of this])
Anyone tell me if this is an acceptable option to proceed? Thank's in advance.

Acceptable. KDZ to 11A.

Just wanted to post I was successful using lg flash tool to revert to 11A, rooted, freegee twrp, flashed 2.6.3.3, flashed OSE ROM. Everything is well ATM!
Sent from my LG-VS980 using Tapatalk

Could someone please help unbrick my Sprint LG G2 with TMOBILE ROM?

YoungGunner posted this thread at one point and I have a question about it... heres his thread:
This will make your device think it is a d801 but that is what we want to have USA DOMESTIC GSM
all features seem to be working, though i have not tested 100% of everything.
Working
confirmed:
talk,text,web(HPSA+ 4G),mms working
BUGS:
NFC -
Rest Unknown
any other issues let me know.
I am not responsible for the damages you or I and my related files might cause to your device.
YOU MUST BE ROOTED;
WIPE, DATA, WIPE CACHE, INSTALL ROM, INSTALL GAPPS, REBOOT.
ENJOY!
This is my question based on his thread:
Could you please help me? Someone I bought this phone from had done this.. and I didnt know it was a custom rom so I flashed the Tmobile stock recovery KDZ thinking i could unroot and get my OTA updates. Turns out it was a sprint phone, and so the tmobile stock rom is unstable, rebooting all the time and so i cant even root now. I cant flash the TOT file from sprint because the phone now thinks its a D801 (due to the CRC check)... could you help or explain to me how I can get sprint stock rom back on this phone ? I don't know how its possible when it keeps resetting, and wont allow me to install Sprint TOT because LGFLASHTOOL says "wrong model" .. is there a way to make this phone think its a LS980 again intead of D801 in the settings... and please keep in mind it reboots every minute or minute and a half on me so if your method involves a bunch of work that i cant pull off quickly im a little it screwed... i figured there might be a way to edit the model number.. please help if you can, i just bought the phone and if its bricked i just lost a lot of money... thanks in advance

Do you know how to get it into download mode?
Sent from my LG-LS980 flashed to boost mobile using Tapatalk

tegezee said:
Do you know how to get it into download mode?
Sent from my LG-LS980 flashed to boost mobile using Tapatalk
Click to expand...
Click to collapse
I'm going to assume he knows how since he is taking about files that's can only be flashed through the lg tool.
And that's all I would be able to recommend to you to fix it would be follow the back to stock method for our device.. Maybe abd a recovery to the phone that's all I would think to do.
Are you on sprint If so do you have insurance you can go to a sprint service center. They can advanced exchange it for you but don't tall about rooting it or flashing a tmobile firmware on it or they won't do that. Or have a buddy with sprint & insurance activate your device they can do the exchange on it is free that way.
Sent from my SAMSUNG-SM-N900A using Tapatalk

dincdoes.me said:
I'm going to assume he knows how since he is taking about files that's can only be flashed through the lg tool.
And that's all I would be able to recommend to you to fix it would be follow the back to stock method for our device.. Maybe abd a recovery to the phone that's all I would think to do.
Are you on sprint If so do you have insurance you can go to a sprint service center. They can advanced exchange it for you but don't tall about rooting it or flashing a tmobile firmware on it or they won't do that. Or have a buddy with sprint & insurance activate your device they can do the exchange on it is free that way.
Sent from my SAMSUNG-SM-N900A using Tapatalk
Click to expand...
Click to collapse
I would assume he's on sprint since he said he flashed a T-Mobile rom & it's a sprint variant.
Sent from my LG-LS980 flashed to boost mobile using Tapatalk

So firs of all U need root your device even is looking as D801 model
Download Stock Sprint rom in .zip and copy on your card if U are available
Try install TWRP recovery I was used OptimusRs Recovery flasher
If U are sucsess flash the stock rom via TWRP recovery
Let me know if I helped U :good:

Correct, you need to flash a ls980 Rom to make our device show up again as a ls980, I'm working on a flashable zip that will make it easier switching back and forth. If you need extra assistance feel free to contact me via PM and I can probably.help you out.
Sent from my LG-D802 using xda app-developers app

younggunner said:
Correct, you need to flash a ls980 Rom to make our device show up again as a ls980, I'm working on a flashable zip that will make it easier switching back and forth. If you need extra assistance feel free to contact me via PM and I can probably.help you out.
Sent from my LG-D802 using xda app-developers app
Click to expand...
Click to collapse
I'm in the same position as OP, but I have managed to flash CWM but, I still can't get it back to being ls980...

if you can get into recovery, just simply adb push or adb sideload your ls980 rom. that should allow you to use download mode as a ls980 after it returns to a ls980 build.prop

younggunner said:
if you can get into recovery, just simply adb push or adb sideload your ls980 rom. that should allow you to use download mode as a ls980 after it returns to a ls980 build.prop
Click to expand...
Click to collapse
I tried that and it gives *cannot read 'sideload' *

adb
do you have the latest adb drivers and files installed?

younggunner said:
do you have the latest adb drivers and files installed?
Click to expand...
Click to collapse
yes i do, I tried sideloading cm10 for ls980 and it side loaded but failed to install said device id does not match..and when I try sideloading stock ls980 rom it fails to side load it and gives me that error...

give me a few minutes and ill get you a stock d801 rom that will boot on your device (modified to work on our ls980) that should allow you to flash it through recovery, then get booted up to place a rom on your internal storage
---------- Post added at 11:10 PM ---------- Previous post was at 11:00 PM ----------
https://drive.google.com/file/d/0B6HYWZRx8JLsZlBlbUt1c0MwYjQ/edit?usp=sharing
this is a stock tomible rom that will work on our ls980 - this was made by justinswidebody.
flash this (just like a normal rom) reboot your phone
place your new rom on the device, flash that (just like a normal rom)
and that should return your device state back to a ls980, or you can boot into the rom change your build.prop and then use download mode.
either way should help fix your issue.

Moved out of the Development Threads....as it does not belong there...OP please read the Forum Rules on posting. Thanks.

thanks judge

I'm sideloading Optimus rom and it's stuck at 95%....I check the updater-script of this rom and it doesn't have any model id, so it should work
younggunner said:
give me a few minutes and ill get you a stock d801 rom that will boot on your device (modified to work on our ls980) that should allow you to flash it through recovery, then get booted up to place a rom on your internal storage
---------- Post added at 11:10 PM ---------- Previous post was at 11:00 PM ----------
https://drive.google.com/file/d/0B6HYWZRx8JLsZlBlbUt1c0MwYjQ/edit?usp=sharing
this is a stock tomible rom that will work on our ls980 - this was made by justinswidebody.
flash this (just like a normal rom) reboot your phone
place your new rom on the device, flash that (just like a normal rom)
and that should return your device state back to a ls980, or you can boot into the rom change your build.prop and then use download mode.
either way should help fix your issue.
Click to expand...
Click to collapse
The rom I'm currently on reboots itself each 20secs which makes it hard to place the rom on to it...
---------- Post added at 06:10 PM ---------- Previous post was at 05:29 PM ----------

I'm trying again today, so I got TWRP on it this time, and I sidenloaded "sprint T-mobile rom" and it flashed successful and it shows 2.2gb as space taken up the rom. But, when I reboot I get:
fastboot
udc_start()
so now what?
edit: so now I'm getting this:
[780] fast boot mode start
[830] udc_start()
[990] -reset-
[1000] -port charge-
[1090] fastboot: processing commands
Also it says:
E: Unable to find partition size for '/sb12'
E: Unable to find partition size for '/sb13'
seems it's has gotten worse than before...i think doing cache clearing after flashing the rom wasn't a good thing...

so, another update in download mode, at the bottom in red it says B96 and rooted...so what does this mean?

htc fan89 said:
I'm trying again today, so I got TWRP on it this time, and I sidenloaded "sprint T-mobile rom" and it flashed successful and it shows 2.2gb as space taken up the rom. But, when I reboot I get:
fastboot
udc_start()
so now what?
edit: so now I'm getting this:
[780] fast boot mode start
[830] udc_start()
[990] -reset-
[1000] -port charge-
[1090] fastboot: processing commands
Also it says:
E: Unable to find partition size for '/sb12'
E: Unable to find partition size for '/sb13'
seems it's has gotten worse than before...i think doing cache clearing after flashing the rom wasn't a good thing...
Click to expand...
Click to collapse
Just search how to back to stock rom t mobile. You flash the stock rom tmobile kdz via lg flash tool.
After flash, you ve got tmobile rom. But always crash every 30 seconds.
Root via adb, and flash twrp recovery. You have done quickly coz random boot.
After success root and flash twrp, you download stock rooted rom sprint ekstension zip.
Flash via twrp, and you back to fasboot mode, bootloop. But your g2 was sprint again.
Download rom back to stock, fill dll and tot file, flash via lg flash tool. Awesome, you be back to new handheld.
Sorry my english so bad...

abiarul said:
Just search how to back to stock rom t mobile. You flash the stock rom tmobile kdz via lg flash tool.
After flash, you ve got tmobile rom. But always crash every 30 seconds.
Root via adb, and flash twrp recovery. You have done quickly coz random boot.
After success root and flash twrp, you download stock rooted rom sprint ekstension zip.
Flash via twrp, and you back to fasboot mode, bootloop. But your g2 was sprint again.
Download rom back to stock, fill dll and tot file, flash via lg flash tool. Awesome, you be back to new handheld.
Sorry my english so bad...
Click to expand...
Click to collapse
Thank you so much, It worked...I'm back to stock sprint rom and no more problems...:laugh::laugh::laugh::good::good:

htc fan89 said:
Thank you so much, It worked...I'm back to stock sprint rom and no more problems...:laugh::laugh::laugh::good::good:
Click to expand...
Click to collapse
I'm glad to help you:good:

phone won't boot

Hi, I'm on KK stock, rooted without custom recovery. I've changed some values in mixer_paths.xml to boost speakers, rebooted phone, and now it won't boot. I'm stuck after but animation on logo... It's there any way to fix this, maybe via an or something?

nyorbee said:
Hi, I'm on KK stock, rooted without custom recovery. I've changed some values in mixer_paths.xml to boost speakers, rebooted phone, and now it won't boot. I'm stuck after but animation on logo... It's there any way to fix this, maybe via an or something?
Click to expand...
Click to collapse
Changing xml on the phone can cause issues such as the one you are experiencing now and since you don't have custom recovery the only way is to go back to stock
Sent from my LG-D800 running stock kk, rooted with philz using XDA app

XxZombiePikachu said:
Changing xml on the phone can cause issues such as the one you are experiencing now and since you don't have custom recovery the only way is to go back to stock
Sent from my LG-D800 running stock kk, rooted with philz using XDA app
Click to expand...
Click to collapse
I was trying to avoid that... You sure there is no other way?

When all else fails, use the LG flash tool to go back to stock. That's what I've learned.

Maybe there is some way to restore this file?

nyorbee said:
Maybe there is some way to restore this file?
Click to expand...
Click to collapse
well like I said without custom recovery there is no way of flashing anything so the only way is to go back to stock
It's moments like these you notice how important custom recovery is...

XxZombiePikachu said:
well like I said without custom recovery there is no way of flashing anything so the only way is to go back to stock
It's moments like these you notice how important custom recovery is...
Click to expand...
Click to collapse
Ok, I restore stock via lg tool from kdz file, but on fresh stock, and even ehen i restore JB backup, phone don't see sim card...

Tried the FreeGee beta on my rooted KitKat stock ROM...now I can't boot

So yeah. Installed the FreeGee beta which supposedly supports KitKat. It installed TWRP and it works...but now if I try booting into the actual OS, I get stuck at the LG logo (not the animated one).
"Alright," I said, annoyed. "I'll have to just use download mode and go back to 4.2.2 and start over."
Except download mode doesn't work. It gets stuck on the Download Mode splash screen but doesn't go any further...
What should I do? :/
TWRP - working
OS - not working
Download mode - not working

Well if you have adb setup you can try pushing a 4.2 Rom plus jb baseband to see if you can boot that way
Sent from my LG-D800 running stock kk, rooted with philz using XDA app

Would that fix Download Mode?

I'm not sure
Sent from my LG-D800 running stock kk, rooted with philz using XDA app

I believe you were supposed to flash a patched kernel for kk after installing the recovery.
if you can push it to your phone and flash it in recovery it might boot correctly. i could be wrong though

No idea how to push it to the phone. ADB sideload doesn't work, just says "starting" but doesn't actually progress.
EDIT: Alright I fixed the sideload. It works now! Any guidance as to what kernel files I need to flash? Sorry for being so terrible at this.

mKTank said:
No idea how to push it to the phone. ADB sideload doesn't work, just says "starting" but doesn't actually progress.
Click to expand...
Click to collapse
do you have any backups you can restore to?

snowlin said:
do you have any backups you can restore to?
Click to expand...
Click to collapse
Nope, cause I just installed the recovery from scratch so...never really had the chance to do a backup before things went downhill.
In other news, I fixed my sideload so now it's working. Any guidance as to what kernel I need to flash? Sorry for being so terrible at this.

mKTank said:
Nope, cause I just installed the recovery from scratch so...never really had the chance to do a backup before things went downhill.
In other news, I fixed my sideload so now it's working. Any guidance as to what kernel I need to flash? Sorry for being so terrible at this.
Click to expand...
Click to collapse
Here's a link to the patched kk kernels - download the one for your variant : http://www.androidfilehost.com/?w=files&flid=12894 [taken from thread: http://forum.xda-developers.com/showthread.php?t=2680948]
im not completely sure it will work but if i remember correctly you need this patched kernel (or any other patched kk kernel) for everything to work correctly (kk + root + recovery)

Hey man, thanks for sticking with me and giving me all the recommendations. I managed to sideload the latest Mahdi ROM along with my variant's kernel. Currently doing first boot but it's taking a while...
BOOTED! Now attempting Download Mode.
Alright, download mode is still broken. I can boot in and everything but no Download Mode. This is a weird issue.

mKTank said:
Hey man, thanks for sticking with me and giving me all the recommendations. I managed to sideload the latest Mahdi ROM along with my variant's kernel. Currently doing first boot but it's taking a while...
Click to expand...
Click to collapse
no worries, i was really stoked when i got everything working so i kinda remember the process
not sure about mahdi rom since i dont think its based on the official kk source for this phone
you should only need a patched kernel if you are using a stock kk rom or the g pro 2 ports with a custom recovery

Yeah I meant the patch that is supplied with Mahdi.
So the issue now has evolved to: I have TWRP, I can boot in just fine, and everything works fine..except download mode is broken. I don't even know where to start on how to fix that. Any ideas? Cause if it's stuck this way, I'm gonna have to be really damn careful with how I use this phone from now on.

Unfortunately idk **** about fixing download mode lol.
Maybe try flashing a stock kdz and starting the root + recovery process over
Sent from my LG-D801 using xda app-developers app

Need download mode to flash KDZs, no?

Ah crap you're right.
Yea idk man sorry, someone with more dev knowledge is gunna have to help you there
Sent from my LG-D801 using xda app-developers app
---------- Post added at 04:36 AM ---------- Previous post was at 04:30 AM ----------
Found this thread with a fix to your problem. Hope this helps
http://forum.xda-developers.com/showthread.php?t=2582142
Sent from my LG-D801 using xda app-developers app

No problem dude, thanks for the help!
Aside: I do have the stock aboot.img file...would flashing it fix this?

Its worth a shot I guess. Do a Backup then try flashing the aboot and then the patched kernel again. If it comes down to it haha
Sent from my LG-D801 using xda app-developers app

Again sorry for being super crap at this, but how exactly do I flash the .img? I noticed in the freegee folder there's a "revert aboot" zip but it fails to flash (some binary installer issue), even with using 2.6.3.4 which should fix installer issues.

You probably have to push it somewhere via adb. Im pretty crap at this stuff too so don't worry.
Id Go over that thread I linked earlier before trying anything drastic just to be sure.
Sent from my LG-D801 using xda app-developers app

Alright man, thanks again!

Help the learning noob somewhat LG G2 T-Mobile D8o130b

Okay so i have a few questions here its been a while since i have placed a Rom onto my device the last one was a Sprint model of the G2 and i was able to successfully install CM12 nightly onto it.
With my T-Mobile G2 i had used the once click root application to do so and used auto rec from the app store to install TWRP recovery hopefully i didn't do anything wrong at this point. So now i try to boot into recovery using the power and the down key at the same time but when i did this i was prompted with do you want to reset all data or not and i of course i chose no and booted back home.
Yes i have Super Su with granting access so to solve this minor problem. I had the quick boot application here to boot into recovery but another problem persisted. I cant flash anything over it fails every time and i am trying to flash 5.1.1 cm 12 i think with gapps with 5.1 i believe but in doing so still failed it matched up and everything. I thought that maybe i was trying to flash something that's really not compatible with my phone so i tried to use the same rom but different carriers.
It was cm-12-20150406-NIGHTLY-D801.zip and gapps-lp-20150222-signed but still failed to install the rom? is there something im doing wrong? May i have a tutorial step by step on what to do to successfully flash? and why cant i boot into recovery with the button configuration did i do something wrong with that i just want to so that if theirs a boot load epidermic and i need to use that to restore and see what the problem is? just need help please

Tensaz said:
Okay so i have a few questions here its been a while since i have placed a Rom onto my device the last one was a Sprint model of the G2 and i was able to successfully install CM12 nightly onto it.
With my T-Mobile G2 i had used the once click root application to do so and used auto rec from the app store to install TWRP recovery hopefully i didn't do anything wrong at this point so now i try to boot into recovery using the power and the down key at the same time but when i did this i was prompted with do you want to reset all data or not and i of course i chose no and booted back home and yes i have Super Su with granting access so to solve this minor problem i had the quick boot application here to boot into recovery but another problem persisted i cant flash anything over it fails every time and i am trying to flash 5.1.1 cm 12 i think with gapps with 5.1 i believe but in doing so still failed it matched up and everything. I thought that maybe i was trying to flash something that's really not compatible with my phone so i tried to use the same rom but different carriers cm-12-20150406-NIGHTLY-D801.zip and gapps-lp-20150222-signed but still failed to install the rom? is there something im doing wrong? May i have a tutorial step by step on what to do to successfully flash? and why cant i boot into recovery with the button configuration did i do something wrong with that i just want to so that if theirs a boot load epidermic and i need to use that to restore and see what the problem is? just need help please
Click to expand...
Click to collapse
There's no way anyone can read that without any punctuation marks or any paragraph order.
Basically, the data reset function doesn't work when you have a custom recovery, that's how you enter it. But the TWRP version installed is usually old, somewhat like 2.7.0.0, so you need to update it before installing any roms.

If you really do have recovery installed when you get to the screen about erasing data just choose yes and yes and it will just take you to recovery. If that's too scary for you then just boot into recovery using an app like rebooter from the play store.
As far as flashing it sounds like you may have downloaded bad files. If you're using your phone to download the roms maybe try using a pc then transferring to your phone. And DON'T flash roms for a different carrier, you're just asking for trouble.
Sent from my LG-D801

Choristav said:
There's no way anyone can read that without any punctuation marks or any paragraph order.
Basically, the data reset function doesn't work when you have a custom recovery, that's how you enter it. But the TWRP version installed is usually old, somewhat like 2.7.0.0, so you need to update it before installing any roms.
Click to expand...
Click to collapse
I Have version 2.8.6.1

rick09 said:
If you really do have recovery installed when you get to the screen about erasing data just choose yes and yes and it will just take you to recovery. If that's too scary for you then just boot into recovery using an app like rebooter from the play store.
As far as flashing it sounds like you may have downloaded bad files. If you're using your phone to download the roms maybe try using a pc then transferring to your phone. And DON'T flash roms for a different carrier, you're just asking for trouble.
Sent from my LG-D801
Click to expand...
Click to collapse
I used my computer to download the files all together and the problem still persisted.
And that i do know to not flash with different Carrier did it with a s4 without thinking.

Tensaz said:
I used my computer to download the files all together and the problem still persisted.
And that i do know to not flash with different Carrier did it with a s4 without thinking.
Click to expand...
Click to collapse
The problem might be that you are on the wrong bootloader so v30 lollipop. As loki and bump don't work on it it will result into an failed flash. What you can do is flash the right bootloader or easily downgrade bootloader and bootstack with autorec for your phone. Read carefully which one you need for your tmobile d801. If there is an loki error then just flash the jellybean bootloader what you easily can do with autorec.
Sent from my LG-D802 using Tapatalk

wulsic said:
The problem might be that you are on the wrong bootloader so v30 lollipop. As loki and bump don't work on it it will result into an failed flash. What you can do is flash the right bootloader or easily downgrade bootloader and bootstack with autorec for your phone. Read carefully which one you need for your tmobile d801. If there is an loki error then just flash the jellybean bootloader what you easily can do with autorec.
Sent from my LG-D802 using Tapatalk
Click to expand...
Click to collapse
Still a bit noobish how do i do that boot loader thing?

Tensaz said:
Still a bit noobish how do i do that boot loader thing?
Click to expand...
Click to collapse
Well you download the right version for your d801
https://www.androidfilehost.com/?w=files&flid=13763
Then you need to install it
Click on the lollipop and let it do its job. If it asks for root then allow it.
It will probably reboot and you are done. Only need to flash then a newer recovery. Also search bender_007 on xda and leave him a thanks perhaps for his app
Sent from my LG-D802 using Tapatalk

wulsic said:
Well you download the right version for your d801
Then you need to install it
Click on the lollipop and let it do its job. If it asks for root then allow it.
It will probably reboot and you are done. Only need to flash then a newer recovery. Also search bender_007 on xda and leave him a thanks perhaps for his app
Sent from my LG-D802 using Tapatalk
Click to expand...
Click to collapse
my god i can flash now awesome thank you now i have one last question if you dont mind telling me since i downgraded my boot loader to kk i think using the auto rec do i need to flash my current 30b boot-stack first before i use my stock restore? or is there an easier way to do so (tried to go into stock but was met with a black screen after lg logo)

Tensaz said:
my god i can flash now awesome thank you now i have one last question if you dont mind telling me since i downgraded my boot loader to kk i think using the auto rec do i need to flash my current 30b boot-stack first before i use my stock restore? or is there an easier way to do so (tried to go into stock but was met with a black screen after lg logo)
Click to expand...
Click to collapse
Well, as far as I know autorec downgrades to jb bootloader, to boot into stock you could find d801 lp modem and d801 lp bootstack/bootloader as it might need kk bootloader
Sent from my LG-D802 using Tapatalk

wulsic said:
Well, as far as I know autorec downgrades to jb bootloader, to boot into stock you could find d801 lp modem and d801 lp bootstack/bootloader as it might need kk bootloader
Sent from my LG-D802 using Tapatalk
Click to expand...
Click to collapse
thank you for your help i now have a boot loader for stock that i found and im using auto rec for every time i reboot to cm12 getting the hang of this flashing thing i just want to know if theres any problems with the network service for cm12 at all?

Tensaz said:
thank you for your help i now have a boot loader for stock that i found and im using auto rec for every time i reboot to cm12 getting the hang of this flashing thing i just want to know if theres any problems with the network service for cm12 at all?
Click to expand...
Click to collapse
With cm12 I am not sure but the cause could be perhaps the wrong modem, and or bootloader. I also suggest to check out newer custom roms the only cyanogenmod as some custom roms are already running on lollipop modem and caf. CAF is code aurora forum so kinda it will also have changes specifically for qualcomm devices.
Sent from my LG-D802 using Tapatalk