Develop Bugs

Invalid sim card error after flashing E975 kdz

I successfully (??) flashed my F180k to E975K kdz/
everything seems ok, but I get Invalid sim error, and obviously cannot connect/
I tried to unlock the phone using freegee, running TWRP, with no success. should i run CWM 6.0.3.0?
Any other ideas why the phone is locked or how to unlock it?
thanks,

invalid sim got nothing to do with lock bootloader and recovery and freegee

the phone is permanently locked (!!) help...
Any ideas how to bypass it?

if it was working fine before try the same stock f180 firmware and see if that works, have no idea about sim unlocking on optimus G. search for that.

gilsh4321 said:
Any ideas how to bypass it?
Click to expand...
Click to collapse
you need to flash f180 baseband, 1st check your f180 S or K or L then flash baseband made for your variant

thanks, I will try
sunyakram said:
you need to flash f180 baseband, 1st check your f180 S or K or L then flash baseband made for your variant
Click to expand...
Click to collapse
BTW, I was following your (great) instructions. probably did something wrong while trying to flash the baseband. I will retry.

gilsh4321 said:
BTW, I was following your (great) instructions. probably did something wrong while trying to flash the baseband. I will retry.
Click to expand...
Click to collapse
sorry if i was wrong,but many people including me use the method and have no worry,the problem only came when we make a lil mistake,what your model? f180s/f180l/f180k?

I was convertiong LG F180k to E975
sunyakram said:
sorry if i was wrong,but many people including me use the method and have no worry,the problem only came when we make a lil mistake,what your model? f180s/f180l/f180k?
Click to expand...
Click to collapse
your guide is really great, I probably did something wrong. how can I tell if I am running the right baseband?
the baseband currently installed on my phone is APQ8064/MDM9x15M.
do you have another baseban file other than what you've linked to on your guide?
many thanks!

gilsh4321 said:
your guide is really great, I probably did something wrong. how can I tell if I am running the right baseband?
the baseband currently installed on my phone is APQ8064/MDM9x15M.
do you have another baseban file other than what you've linked to on your guide?
many thanks!
Click to expand...
Click to collapse
i dsnt post any guide on here or any where,okay?
here are the links
f180s
f180k
f180l

I flashed the baseband, but it is still permanently locked.
Any ideas as to how can it be unlocked? maybe if I will use other EFS backup?
will it be solved if I will go back to to the original KDZ?

gilsh4321 said:
Any ideas as to how can it be unlocked? maybe if I will use other EFS backup?
will it be solved if I will go back to to the original KDZ?
Click to expand...
Click to collapse
have you backed up your efs before installing kdz? it may help you for working sim cards.
but if you revert back to orignal kdz baseband is a issue here again

Did u hard reset after flashing kdz???
Sent from my Optimus G using Tapatalk

I have the same problem
atifsh said:
if it was working fine before try the same stock f180 firmware and see if that works, have no idea about sim unlocking on optimus G. search for that.
Click to expand...
Click to collapse
I have the same problem and when I turn it back to stock F180K firmware it recognizes any sim very well
---------- Post added at 12:04 PM ---------- Previous post was at 11:57 AM ----------
sunyakram said:
you need to flash f180 baseband, 1st check your f180 S or K or L then flash baseband made for your variant
Click to expand...
Click to collapse
This did not solve the problem.
The baseband fix seems to only fix the reception issues of the phone so that it can pick up the signal.
The problem I have is about the phone not recognizing the sim card. It will only recognize it when I go back to the stock F180K rom not the E975 rom.
By the way, all F180 phones are pre-unlocked by Korean law.

jung901 said:
I have the same problem and when I turn it back to stock F180K firmware it recognizes any sim very well
---------- Post added at 12:04 PM ---------- Previous post was at 11:57 AM ----------
This did not solve the problem.
The baseband fix seems to only fix the reception issues of the phone so that it can pick up the signal.
The problem I have is about the phone not recognizing the sim card. It will only recognize it when I go back to the stock F180K rom not the E975 rom.
By the way, all F180 phones are pre-unlocked by Korean law.
Click to expand...
Click to collapse
can you please help me?
even if i go back to stock f180k, i still can't get a signal
is it my sim?
i already flash the baseband but still no use

call me
coldmalice said:
can you please help me?
even if i go back to stock f180k, i still can't get a signal
is it my sim?
i already flash the baseband but still no use
Click to expand...
Click to collapse
You do not need to touch the baseband if you already flashed the F180K rom.
The sim should be recognized and baseband should be the right one already.
If you need further info add jseo to kakao talk and send me a message and we can talk real time. I'm in Seoul

jung901 said:
You do not need to touch the baseband if you already flashed the F180K rom.
The sim should be recognized and baseband should be the right one already.
If you need further info add jseo to kakao talk and send me a message and we can talk real time. I'm in Seoul
Click to expand...
Click to collapse
Can you please tell me what to do?

Invalid sim card after converting E975
neaznc021 said:
Can you please tell me what to do?
Click to expand...
Click to collapse
Hi Guys,
I need expert help here , it looks i brick my handset while i was trying to convert it into E975 by following the instruction
Guide
Regardless of which firmware you are currently running on your F180, you will need to download and switch to the corresponding one from the list below:
F180S : F180S20B_00.kdz
F180K : F180K20B_00.kdz
F180L : F180L20H_00.kdz
Tip: You can find your phone’s model by going to ‘Settings > About > Phone identity’ in Android.
Warning: Make sure your phone’s battery is at least charged 80%. Don’t proceed otherwise as LG Optimus G comes with non-removable battery and thus you won’t be able to easily swap the battery if it dies in the middle of the process.
It is mandatory that you factory reset your phone before proceeding. For doing so, go to ‘Settings > Privacy > Factory data reset’. Please keep in mind that doing so will wipe your phone including contacts, messages, mails, applications and all the data on your phone’s internal storage. Your phone will reboot twice. Let it boot after factory reset. Once you are on the language selection screen, power off your phone
Press and hold down ‘Volume Up’ + ‘Volume Down’ and while inserting USB cable in to the phone. This will get you to S/W download mode on LG F180.
Now you need to flash the firmware you downloaded earlier. Please refer to the guide here:
How to: Download and Install KDZ LG firmware – All Android models
Once the KDZ firmware is successfully flashed, your phone will reboot automatically. Once it fully boots up, go through the setup procedure and again factory reset it as you already did once.
Once you are on the language selection screen, power off your phone
Once again, put your phone in download mode
For converting your phone to E975, we’ll be flashing this E975 Hong Kong KDZ:
Follow the same procedure for flashing KDZ as you did earlier.
Once the KDZ flash is successful, go through the set-up procedure. Now go to ‘Settings > Storage’ and make sure your internal storage is being listed there. If it shows “0.00 GB” there, don’t panic. Power off your phone. Once completely off, press and hold down ‘Volume Down’ + ‘Power’ buttons until the phone displays a hard reset screen. Release ‘Volume Down’ and press ‘Power’ twice for resetting your phone.
Your phone will reboot once again and your phone’s internal storage will be back to normal.
Now you need to root your phone. Please refer to our LG Optimus G universal rooting guide here:
Universal root for LG Optimus G – Any firmware
Once you are done with rooting process, make sure you reboot your phone at least once if it doesn’t reboot automatically.
Now we will be flashing LG F180 baseband. Download your corresponding baseband backup from the list below:
F180S Baseband
F180K Baseband
F180L Baseband
Unzip the downloaded archive and you will find a batch file named ‘modem-flash’ inside it. Make sure ‘USB Debugging’ is enabled on your phone and your phone is in ‘Charge only’ mode while connected to the PC. Run the ‘modem-flash’ batch file.
Keep an eye on your phone screen as you will need to tap the grant permission button on SuperSU pop-up. If you miss the pop-up as it expires after 10 sec, run ‘modem-flash’ batch file again.
Once the baseband has been flashed successfully, reboot your phone
Congratulations! You have just converted LG F180 to LG E975.
it converted successfully but when i insert sim in it says invalid sim card , i have updated the base band given in above link but no luck then i tried to flash the original rom with many version for this set same thing again ,no signal no network .i think i mess up with the orginal modem without taking any kind of backup.
I need expert advise here how to fix it and which kdz to use to fix it.
looking forward for your reply.
Thanks,

@ranadawood: Flash original kdz file for your respective model to get back network ...
e.g F180L/k or S one

umair928 said:
@ranadawood: Flash original kdz file for your respective model to get back network ...
e.g F180L/k or S one
Click to expand...
Click to collapse
I already tried but no luck i tried F180K20O but no luck ,trying F180K30b_00 giving me extract erro.
Please let me know which could be the original rom for my phone and?
Thanks

ranadawood said:
I already tried but no luck i tried F180K20O but no luck ,trying F180K30b_00 giving me extract erro.
Please let me know which could be the original rom for my phone and?
Thanks
Click to expand...
Click to collapse
Follow this guide, This has also many fix included...
http://forum.xda-developers.com/showthread.php?t=2625044
and if none of above work for you than try to flash kdz with cdma mode rather than 3gqt and start kdz flashing by selecting CSE web upgrade test

LG G3 Virgin Mobile/ Bell D852 Variant TWRP/Downgrade Help for unlocking baseband

Alright. Where do I start.
I want my phone to work with Wind network here in canada. I have the LG G3 D852 locked to bell/Virgin mobile, running androind 6.0 MM
I've already purchased an unlock code to use with any SIM, and this does work, however, being that it is the D852 variant, and not the D852g variant, the baseband is locked for this cellular network modem- wise.
My attempts to rectify this was to flash it with a stock D852g, as the hardware is the same, the only difference being Bell's desire to shaft you up the A**.
Anyway, I first went about this by using the LG Flash tool to flash the D852g .tot onto the phone using download mode, however, that failed. It said "Hardware Mismatch error" in the LG flash tool.
Then, I went about trying to flash the original D852 .tot, but with Android 4 or 5 instead of MM. Same Issue- Hardware Mismatch error.
So i resorted to downloading Kingroot, which achieved temporary root, and flashing TWRP.
This works, untill I try to boot into TWRP recovery. (This issue is present with both 3.0 and 2.8) When I reboot, it says signature check fail, or something of the sorts, and the phone screen goes blank, and i'm left with warning flashing lights.
HOWEVER, if I restart the phone, it boots normally.
How can I flash TWRP so I can get a custom rom, or just a D852g stock rom on here so I can utilize the addidional basebands and NOT have to buy a new phone on tab from one of Canada's draconian phone companies?
Is this even possible?

You cannot flash a ROM for a different model. The d852's hardware is the same as the AT&T D850 model but flashing a d850 ROM will brick the phone. I'm surprised your phone even boots for most people flashing the wrong model hardbricks there phone. Also what carrier are you trying to switch too?
And the d852g has almost no ROM support anyway.
Sent from my LG-D852 using XDA Labs

some guy1701 said:
You cannot flash a ROM for a different model. The d852's hardware is the same as the AT&T D850 model but flashing a d850 ROM will brick the phone. I'm surprised your phone even boots for most people flashing the wrong model hardbricks there phone. Also what carrier are you trying to switch too?
And the d852g has almost no ROM support anyway.
Sent from my LG-D852 using XDA Labs
Click to expand...
Click to collapse
I am trying to switch to WIND. I thought that I could flash a normal d852 rom, with an older version of android using download mode, and then just add in the radio baseband packages so it actually works with their network. But it won't let me flash a normal d852 rom either, it always boots into android 6.0 mm.

some guy1701 said:
You cannot flash a ROM for a different model. The d852's hardware is the same as the AT&T D850 model but flashing a d850 ROM will brick the phone. I'm surprised your phone even boots for most people flashing the wrong model hardbricks there phone. Also what carrier are you trying to switch too?
And the d852g has almost no ROM support anyway.
Sent from my LG-D852 using XDA Labs
Click to expand...
Click to collapse
On the D852G you can flash any D852 rom (I'm doing it right now with fulmics and I've done it with nearly every rom available here on xda)
---------- Post added at 06:21 PM ---------- Previous post was at 06:17 PM ----------
mr.gsmith said:
Alright. Where do I start.
I want my phone to work with Wind network here in canada. I have the LG G3 D852 locked to bell/Virgin mobile, running androind 6.0 MM
I've already purchased an unlock code to use with any SIM, and this does work, however, being that it is the D852 variant, and not the D852g variant, the baseband is locked for this cellular network modem- wise.
My attempts to rectify this was to flash it with a stock D852g, as the hardware is the same, the only difference being Bell's desire to shaft you up the A**.
Anyway, I first went about this by using the LG Flash tool to flash the D852g .tot onto the phone using download mode, however, that failed. It said "Hardware Mismatch error" in the LG flash tool.
Then, I went about trying to flash the original D852 .tot, but with Android 4 or 5 instead of MM. Same Issue- Hardware Mismatch error.
So i resorted to downloading Kingroot, which achieved temporary root, and flashing TWRP.
This works, untill I try to boot into TWRP recovery. (This issue is present with both 3.0 and 2.8) When I reboot, it says signature check fail, or something of the sorts, and the phone screen goes blank, and i'm left with warning flashing lights.
HOWEVER, if I restart the phone, it boots normally.
How can I flash TWRP so I can get a custom rom, or just a D852g stock rom on here so I can utilize the addidional basebands and NOT have to buy a new phone on tab from one of Canada's draconian phone companies?
Is this even possible?
Click to expand...
Click to collapse
Some people already tried to "convert" their phone, you can take a look inside this thread (starting at the bottom of the page number 5)

RapHaeL_4_4_4_ said:
On the D852G you can flash any D852 rom (I'm doing it right now with fulmics and I've done it with nearly every rom available here on xda)
---------- Post added at 06:21 PM ---------- Previous post was at 06:17 PM ----------
Some people already tried to "convert" their phone, you can take a look inside this thread (starting at the bottom of the page number 5)
Click to expand...
Click to collapse
Alright so i tried flashing twrp and every time i try to boot into recovery i get SIG_LEN_ERROR
And if i try to use lg flash tool i het device error. No matter what i try to flash, even if its stock.
Whats up?
I just want the wind baseband on this phone ...

mr.gsmith said:
Alright so i tried flashing twrp and every time i try to boot into recovery i get SIG_LEN_ERROR
And if i try to use lg flash tool i het device error. No matter what i try to flash, even if its stock.
Whats up?
I just want the wind baseband on this phone ...
Click to expand...
Click to collapse
What method you took to flash twrp? And what was your android version before flashing?

Install t-mobile rom onto h812 possible?

I have a lg g4 h812 and its unlock and on T-mobile now. Since it looks like the h811 and h812 have same hardware could I flash h811 firmware onto my h812?

you could always try to flash the first revision of the 811 firmware that is below 10H, i've tried on mine and got me into HardBrick. Got repaired for free.

xavierlangevin1 said:
you could always try to flash the first revision of the 811 firmware that is below 10H, i've tried on mine and got me into HardBrick. Got repaired for free.
Click to expand...
Click to collapse
What version did you flash that caused the hardbrick?

From my understanding you should never cross flash models. Some g4 varients could be differ. But rule of thumb never do it unless confirmed to work

I've successfully flash a 815 & 818 into my 812, but we have to reflash the modem file of the 812 original firmware to be able to obtain network (wifi work but quite laggy).
The 81110H is the firmware that i've tried to install (Phone wont reboot after upgrade and show off like 9008 device) . i don't know if we could modify a kdz for being able to inject directly the modem of the 812 into 815 rom...

Yes you can
I've made this tutorial but you have to change some thinks to use in your variant
PS: you will get some problems with your modem (dont work)
If you found how to get working
Please share
http://forum.xda-developers.com/att-g4/general/how-to-install-cyanogenmod-h810-t3388019

Wjbr1993 said:
Yes you can
I've made this tutorial but you have to change some thinks to use in your variant
PS: you will get some problems with your modem (dont work)
If you found how to get working
Please share
http://forum.xda-developers.com/att-g4/general/how-to-install-cyanogenmod-h810-t3388019
Click to expand...
Click to collapse
Which variant your using ? i wanna test to install the system.img partition into anyother variant that cannot be officially unlocked and try it. *i've get access to g4 812 bootloader with flashing a 815 firmware but can't unlock it...

xavierlangevin1 said:
Which variant your using ? i wanna test to install the system.img partition into anyother variant that cannot be officially unlocked and try it. *i've get access to g4 812 bootloader with flashing a 815 firmware but can't unlock it...
Click to expand...
Click to collapse
Im using a H810 (AT&T) variant
I install a H811 kdz on it
It works perfect but i cant get signal
And yes i can unlock the bootloader with this kdz (H811)

So you tried it ? to unlock ?

Wjbr1993 said:
Yes you can
I've made this tutorial but you have to change some thinks to use in your variant
PS: you will get some problems with your modem (dont work)
If you found how to get working
Please share
http://forum.xda-developers.com/att-g4/general/how-to-install-cyanogenmod-h810-t3388019
Click to expand...
Click to collapse
Can someone could try this with a 815, or any other model than 810 ?
---------- Post added at 06:36 PM ---------- Previous post was at 06:08 PM ----------
iljalways said:
I have a lg g4 h812 and its unlock and on T-mobile now. Since it looks like the h811 and h812 have same hardware could I flash h811 firmware onto my h812?
Click to expand...
Click to collapse
You could try the method of this guy but i can't tell if you will get a hardbrick...

xavierlangevin1 said:
Can someone could try this with a 815, or any other model than 810 ?
---------- Post added at 06:36 PM ---------- Previous post was at 06:08 PM ----------
You could try the method of this guy but i can't tell if you will get a hardbrick...
Click to expand...
Click to collapse
Here it is
I based my tutorial in another one
http://forum.xda-developers.com/g4/general/lg-g4-f500l-restore-signal-flash-815-t3214574

i've seen it before but flashing the 811 kdz give me a hardbrick. If i flash 810 then 811 that could work but cannot try it right now.

xavierlangevin1 said:
i've seen it before but flashing the 811 kdz give me a hardbrick. If i flash 810 then 811 that could work but cannot try it right now.
Click to expand...
Click to collapse
DONT flash a 810 kdz
Just use some steps from my tutorial but using files for your variant

Wjbr1993 said:
DONT flash a 810 kdz
Just use some steps from my tutorial but using files for your variant
Click to expand...
Click to collapse
With the 812 we can't directly flash a 811, without causing a hardbrick. I was only wondering if i could flash a 810 successfully a 811 wont be a problem

xavierlangevin1 said:
With the 812 we can't directly flash a 811, without causing a hardbrick. I was only wondering if i could flash a 810 successfully a 811 wont be a problem
Click to expand...
Click to collapse
Aaah
Yes you can
But you have to flash first with lg flash tool 2014 (flash others kdz without problem)
And then with LG UP

xavierlangevin1 said:
I've successfully flash a 815 & 818 into my 812, but we have to reflash the modem file of the 812 original firmware to be able to obtain network (wifi work but quite laggy).
The 81110H is the firmware that i've tried to install (Phone wont reboot after upgrade and show off like 9008 device) . i don't know if we could modify a kdz for being able to inject directly the modem of the 812 into 815 rom...
Click to expand...
Click to collapse
Hello friend,
I am also thinking of flashing H815(international) rom onto my H812(Canadian) hardware. If you don't mind, could you please tell me how did the phone function with the H815 firmware?
Thank you very much. Your help is greatly appreciated.

BIG_BADASS said:
Hello friend,
I am also thinking of flashing H815(international) rom onto my H812(Canadian) hardware. If you don't mind, could you please tell me how did the phone function with the H815 firmware?
Thank you very much. Your help is greatly appreciated.
Click to expand...
Click to collapse
you cannot use it for daily usage, the mobile network doesn't work and the phone will randomly reboot sometimes.

xavierlangevin1 said:
you cannot use it for daily usage, the mobile network doesn't work and the phone will randomly reboot sometimes.
Click to expand...
Click to collapse
Ok thanks, I'm asking because I'm going on a long trip to UK and the Middle East for 6 or 7 months , and thought flashing the H815 firmware would make it compatible with those networks and therefore a free solution, rather than paying to have it unlocked.
Thanks

xavierlangevin1 said:
you cannot use it for daily usage, the mobile network doesn't work and the phone will randomly reboot sometimes.
Click to expand...
Click to collapse
So by default, H812 has a locked bootloader. But despite this, the flashing of H815 firmware still worked?

If you read carefully all posts in most of the cited "how-to's" ...
If you read carefully all posts in most of the cited "how-to's" that have been linked in the responses you've gotten to date ... you will note that many problems are encountered, ranging anywhere from hard bricks down. Simply not worth the risk, IMO as there is not a high enough probability that you can get back to what you had originally that was working in the first place.
S.

HELP!! Lg G4 Downgrade changed version

Hello after a downgrade from A V20D TWN xxx i wanted to have a European rom rooted in lollipop ive done the flash rom rooted but now i have a V10D OPT2 xxx but i want european how i can do it please... and when i boot i have this error current version is not available for user. can't find matches cost for nt-code mcc/mnc when i reboot too just wanna have european rom rooted because i can't unlock my bootloader ...
Thanks

I don't think you can get kdzs for EUR region, I haven't seen one.

Levent2101 said:
I don't think you can get kdzs for EUR region, I haven't seen one.
Click to expand...
Click to collapse
you wanna say there is impossible to put a eur firmware to a TWM so no problem i flashed a kdz TWN so there is no issue but someone know if there is a possibilty to root lg g4 with bootloader locked in Marshmallow now or in future?

But there is anyway that can i go from a TWM to A Eur firmware please ? In 5.1 or 6.0 because i want to make better my network range because i live in france...
---------- Post added at 08:12 AM ---------- Previous post was at 07:27 AM ----------
Anyone please ?

What is ur model ?? If its H815 u can use this...rooted n xposed works tested it myself
http://forum.xda-developers.com/g4/general/815-taiwan-v10f-t3298685/page8

Yeah my model is h815 it is possible to convert my twn firm to eur if yes how please

sabi95190 said:
Yeah my model is h815 it is possible to convert my twn firm to eur if yes how please
Click to expand...
Click to collapse
It doesnt matter what country ur phone is manufactured from for as long as the model is H815 international just use the stock rom 5.11 above it has good battery usage too flash it via LGUP refurbish or LG flash tool 2014...your phone will still remain taiwan version cuz it was manufactured in taiwan

But i have TWN version and i want EUR version...

sabi95190 said:
But i have TWN version and i want EUR version...
Click to expand...
Click to collapse
Why would u want EUR version ? U know u cant unlock bootloader as of yet just use the v10f...EUR version can have unlock the bootloader feature but only for European H815 models only...u still cant unlock bootloader if u had flashed EUR version

Oh ok but why i cant unlock my bootloader because my device is fron Taïwan is that ? If yes its better i flash the twn version of lollipop because now my battery is draining very fast in mm so can you give me the last kdz of TWN Taïwan please
---------- Post added at 10:23 AM ---------- Previous post was at 10:23 AM ----------
sabi95190 said:
Oh ok but why i cant unlock my bootloader because my device is fron Taïwan is that ? If yes its better i flash the twn version of lollipop because now my battery is draining very fast in mm so can you give me the last kdz of TWN lollipop please
Click to expand...
Click to collapse
?

Just go to the first page download the rom using IDM flash it...bootloader hasnt be unlocked by LG as of yet but it will in near future
http://forum.xda-developers.com/g4/general/815-taiwan-v10f-t3298685/page8

Which post pls sorry i am a new member

Just click the link below and download
http://csmgdl.lgmobile.com/dn/downloader.dev?fileKey=FWCBS87452TDASP04487HYU/H81510F_00_0113.kdz

And i flash with lgup ?

Yes refurbish it

Ok first i select upgrade for upload the kdz after i close lgup i restart lgup and kdz is already here and i select refurbished and i start.... Thanks i will try this when i am home

sabi95190 said:
Ok first i select upgrade for upload the kdz after i close lgup i restart lgup and kdz is already here and i select refurbished and i start.... Thanks i will try this when i am home
Click to expand...
Click to collapse
Yes hit like it helps

its the taiwan version ? lollipop it is better than mm ?

and how can i root this rom

Sabi9578 said:
and how can i root this rom
Click to expand...
Click to collapse
Download rooted system image from here first
https://yadi.sk/d/gXSV3CLtnbXf3
---------- Post added at 05:05 PM ---------- Previous post was at 05:01 PM ----------
You have to install LGUP on your computer.
Then connect your phone to PC (drivers are installed? If not - take them here and install, then connect the phone.
Start LGUP, choose UPGRADE.
Select kdz file.
Change to REFURBISH.
Press start and wait untill the firmware is flashed.
Now you have a brand new 5.1.1 Android phone with 10 f firmware.
Place rootedsystem.img to the internal memory of your phone. Unplug it from the computer.
Download LG_Root.zip and unpack it to C drive.
Turn off the phone untill the LED and display stop blinking. Keep pressing VOLUME UP button and plug USB cable from the computer simultaneously. You`ll see DOWNLOAD MODE, now you can pelease the button. The display will show FIRMWARE UPDATE.
Go to LG_Root folder on your PC and click port.bat twice. In the line ending with DIAG1 you`ll see COM3 or COM4 or COM5 or else. Remember this COM with number.
Open command line in Windows. Go to LG_Root folder ( you can type cd c:/LG_Root for this).
Type Send_Command.exe \\.\COM3 or Send_Command.exe \\.\COM4 or Send_Command.exe \\.\COM5 (use the number I told you to remember). You`ll see #
Type id and press ENTER
Type dd if=/data/media/0/rootedsystem.img bs=8192 seek=55296 count=529920 of=/dev/block/mmcblk0 and press ENTER
Wait untill # appears, then type LEAVE
The phone will reboot, that`s all, it`s rooted.

Camera &calling app not working on my g4 (Help)

Hello,
I have a lg g4 815h bought from ebay India and using in India for a few months back...it was working fine till yesterday. A pop up was coming for a system update since 1 month so I decided to perform the update ...so I allowed the update but as soon the phone rebooted and the android sign came it showed error.
After 5 mins nothing happned so i restarted the device it booted but since then the camera is is not working says unfortunately camera has stopped ,even my phone call pick up screen is not showing when there is a call to answer...
I can call some one but cannot end the call due to no calling screen is appearing.
I did hard reset but the situation is same...
Should I flash using lg flash tool ?any version works on windows xp?I only have a windows xp Pc...
Or please provide a solution which can be performed using recovery like twrp...
Please help...
Thanks in advance

If any advices to flash my device using twrp please also suggest me a simple and stable rom
file...
Thanks
Kind Regards

one more problem I have Identified on my phone ,
I can see the hardware serial no shows LGLS991852e50ae which can be a sprint phone but the software installed shows that the phone's model is H815...
what to do...
please help

ur phone is REFURBISED?

karan5567 said:
one more problem I have Identified on my phone ,
I can see the hardware serial no shows LGLS991852e50ae which can be a sprint phone but the software installed shows that the phone's model is H815...
what to do...
please help
Click to expand...
Click to collapse
open phone . take out mother board .. and read plaque model. if sprint flash sprint KDZ and LGUP. if H815 then do that .. thats the only way to be sure.

U have a refurbished model.Go to nearest mobile repair shop & take out your motherboard to see what model no is written on this.Then flash a rom accoringly. Don't flash any other rom just by assuming else you will brick your device.

Yes my phone is refurbished...
But how to flash the rom?
If I found it to be a sprint version and flash a sprint rom ...it will be locked?I am using phone in India...

Any chance to root the phone and install twrp?
Then flash a custom rom?
Please help...

karan5567 said:
Yes my phone is refurbished...
But how to flash the rom?
If I found it to be a sprint version and flash a sprint rom ...it will be locked?I am using phone in India...
Click to expand...
Click to collapse
Most probably it will be locked cause most higher Android versions LG has blocked rooting or unlocking..But you can always browse few threads.
Mine is also a refurbished model with F500L motherboard,LS911 body & had H815 global rom installed out of the box.I am currently on F500L Nougat locked & unrooted..I have tried almost every method.It failed to root & even to enter fast boot.
If you get your proper model no on motherboard then just flash the rom with ToT flasher in download mode with respective DLL.

asingha94 said:
Most probably it will be locked cause most higher Android versions LG has blocked rooting or unlocking..But you can always browse few threads.
Mine is also a refurbished model with F500L motherboard,LS911 body & had H815 global rom installed out of the box.I am currently on F500L Nougat locked & unrooted..I have tried almost every method.It failed to root & even to enter fast boot.
If you get your proper model no on motherboard then just flash the rom with ToT flasher in download mode with respective DLL.
Click to expand...
Click to collapse
Thanks for your reply...
Your network is locked?
You cant unlock it?
Can we degrade our Os to lollipop to get root?

Even I cant turn on the Enable OEM unlock under the developer mode...
Any more advices?

Please help.....

I have tried almost all h815 ans ls991 roms with all flashing methods but still unable to successfully flash my device...lg tot flash tool always show dl error after 4 to 6 percent of flashing...
Please help

Any idea's?

Pick the phone, and send it to the place where you bought it. If you have warranty the repair is free, if not, then you must pay sadly.

Still no solution, I even cannot enable OEM unlock under developer options...
It automatically disables it...
Please help

Just experienced this issue after changing sim card... Call and Camera stopped working over and over again.
How I solved it: Go to the specific app that is causing you trouble, and clear cache/files (too bad I only found this after 3 factory resets).

Maybe it will help ... LG G4 CAM