Develop Bugs

LG G3 D851 Windows 8.1 Driver

I am using an LG G3 D851 for T-Mobile
Whenever I connect my phone to the PC, it shows the following in Device Manager
CDC Serial
LGE Android Phone
LGE Android Phone
I downloaded the "LGUnitedMobileDriver_S50MAN311AP22_ML_WHQL_Ver_3.11.3" file and LG PC Suite
I've also restarted my PC several times and turned of driver signing.
I also called LG Tech Support but they weren't any help. They said their website isn't updated and I need to wait for the "official" drivers to appear there.

wirelessrevolution said:
I am using an LG G3 D851 for T-Mobile
Whenever I connect my phone to the PC, it shows the following in Device Manager
CDC Serial
LGE Android Phone
LGE Android Phone
I downloaded the "LGUnitedMobileDriver_S50MAN311AP22_ML_WHQL_Ver_3.11.3" file and LG PC Suite
I've also restarted my PC several times and turned of driver signing.
I also called LG Tech Support but they weren't any help. They said their website isn't updated and I need to wait for the "official" drivers to appear there.
Click to expand...
Click to collapse
Anyone please help??

wirelessrevolution said:
Anyone please help??
Click to expand...
Click to collapse
I have no luck on windows 7 either with at&t phone. Tried everything but can't get the phone to come up in explorer. I gave up for now.

xxtypeoxx said:
I have no luck on windows 7 either with at&t phone. Tried everything but can't get the phone to come up in explorer. I gave up for now.
Click to expand...
Click to collapse
I got it working in Windows 7. I'm having issues with Windows 8.1.
For Windows 7, download the drivers that I mentioned above and restart your PC. (Make sure your phone is not plugged in while you are installing the driver)
After your PC is fully loaded, plug your phone and that should do it. If it doesn't work then add the path to the driver in the ENVIRONMENT VARIABLES.

Just install LG PC Suite and do the update option under help then connect via USB and if it cannot find it, it'll ask if you want to re-install the USB drivers, do so and it'll work.
I've done the above on 8.1 and had no issues.

people still use a USB cable to connect their phones in 2014?
there are so many wireless solutions that work perfectly, why bother with USB cables?

I too am having the same issue. I have tried installing just the drivers and then installing LG PC suite. I have the same exact 3 devices listed:
CDC Serial
LGE Android Phone
LGE Android Phone
I also am on windows 8.1 update 1 (64 bit) and am very desperate to get this working so I can root my device. Any help would greatly be appreciated!

wase4711 said:
people still use a USB cable to connect their phones in 2014?
there are so many wireless solutions that work perfectly, why bother with USB cables?
Click to expand...
Click to collapse
Yes....

CAP3r5 said:
I too am having the same issue. I have tried installing just the drivers and then installing LG PC suite. I have the same exact 3 devices listed:
CDC Serial
LGE Android Phone
LGE Android Phone
I also am on windows 8.1 update 1 (64 bit) and am very desperate to get this working so I can root my device. Any help would greatly be appreciated!
Click to expand...
Click to collapse
O! the learned one's, could you please explain me how to flash a stock kdz without the usb cable? will be appreciated. as it gives CDC Serial error
waiting for genius answers. this is not Samsung that we will have mobile odin

LG G3 not recognized under Device Manager Ports.

Hello, I was trying to go back to stock Kitkat by using the LG flash tool. I ran into a problem where my phone went into Factory Reset Status 2. I'm now trying to follow this guide to completing this. http://forum.xda-developers.com/lg-g3/general/problem-returning-to-stock-try-t2862463
The problem I face now it that my computer won't list the phone under ports. I have downloaded the drivers. (Even re installed a few times) The phone gets listed under "Portable Devices" as LGE Android MTP Device. I need to be able to connect it to COM41 to fix this issue but I'm not sure what to do here. Any help is appreciated.

dipalp95 said:
Hello, I was trying to go back to stock Kitkat by using the LG flash tool. I ran into a problem where my phone went into Factory Reset Status 2. I'm now trying to follow this guide to completing this. http://forum.xda-developers.com/lg-g3/general/problem-returning-to-stock-try-t2862463
The problem I face now it that my computer won't list the phone under ports. I have downloaded the drivers. (Even re installed a few times) The phone gets listed under "Portable Devices" as LGE Android MTP Device. I need to be able to connect it to COM41 to fix this issue but I'm not sure what to do here. Any help is appreciated.
Click to expand...
Click to collapse
Should be able to just omit that step. When I used the flash tool mine was not listed under under ports when I did.
Should be listed under that after you change the setting.

##diag# ##3424# enable diag port

Cant update to Marshmallow

I have spent litterally all day trying to update my mrs g3 d855 and i have had no luck, how much of it because my computer i dont know. Im running a chromebook with a full linux distro gallumos installed, got virtual box running 32 bit windows 7. Android sdk, adb etc and got lg drivers installed to recognise the device in its various states, ptp, mtp, download. all that is working. got the official lg mobile support tool and the lg 2014 flash tool.
the problem im having is neither of these will update the phone, if i try to manaully flash the kdz using the flashtool or updating using the official one, it wont update recover either. if i try different region or enter the imei number it always fails at 4%. Iv tried different usb cables, different ports, the phone was at 100% battery the whole time, the laptop was on charge the whole time. I really dont know what else to do, i have no access to another windows machine here and its the mrs phone and she wouldnt want me to take it to work to try on another pc there. As i said earlier the drivers all seem installed correctly, the firmware downloads and extracts as it should but I really am at the point i dont know what else to try

Hello,
Did you try LGUP method? Link is here.
It's easy to use. All you need is there, try it and reply
Just TIP: Do you really have correct drivers for download mode? If LGUP see you device as "unknown", change your COM port to #41
Do "FULL WIPE AND INSTALL MM"

I think I might of, how ever before work I did download a version of lg up and some kind of other installer for it. I also got a kdz file to try and flash. The drivers should all be fine, it gets recognised in all the various modes. My fiance is on nights this week, the soonest il be able to try again is tomorrow so I will let you know it goes. Thank you for replying

The Gingerbread Man said:
I think I might of, how ever before work I did download a version of lg up and some kind of other installer for it. I also got a kdz file to try and flash. The drivers should all be fine, it gets recognised in all the various modes. My fiance is on nights this week, the soonest il be able to try again is tomorrow so I will let you know it goes. Thank you for replying
Click to expand...
Click to collapse
You can send me a PM, or just reply to this thread.
It's a common problem with various solutions. We will look at it.

halekhonza said:
You can send me a PM, or just reply to this thread.
It's a common problem with various solutions. We will look at it.
Click to expand...
Click to collapse
Thanks buddy il let you know after I can try it again. If it was a Nexus it would be fine, I know all about fastboot, unlocking bootloaders and rooting and stuff for the Nexus line. So much easier to work with

So I think I might know where I'm going wrong, i thought I had all the drivers set up but there's one I missed, for download mode
Under device manager I see when the phone is turned on with adb on
Android device- lge mobile adb interface-google Inc 4.0.0.0-working properly
Portable devices-g3-lg electronics 4.0.0.0-working properly
Ports (com & lot)-lg mobile USB serial port (com 4)-lg electronics 4.0.0.0-working properly
In download mode device manager
android device isn't there, no adb which is fair enough
Portable devices-g3 with yellow warning triangle-lg electronics 4.0.0.0- the device cannot start code 10
Ports (com & lot)-lg mobile USB serial port (com 4)-lg electronics 4.0.0.0-working properly
So I need to trouble shoot why the device cannot start. I have downloaded 2 packs of Lg drivers, lg united mobile driver & lg mobile driver. Both of which contain loads of drivers inside.
If I guide windows into either of the folders it won't install any new drivers giving an error saying that the driver software is already up to date.
I'm going to Google to find out what's going on with device cannot start error, if I'm missing something obvious please jump in

Can you please post complete screenshot with windows device manager (with open ports menu) and adb console with command "adb devices" ?
In your chromebook, do you have disabled all USB power saving bull****s? Also check VM software to see if there is such a possibility to enable/disable USB power plans.
At least, sorry for my bad english Still a lot of things to learn.

Your English is fine I understand perfectly, in fact I wouldn't of guessed it's not your native language so don't worry! Iv taken photos of my screen. You will see when the phone is turned on normally the host and client can both see the device and adb shows the device is detected and returns the serial number, all good there. The last photos shows when it's in download mode and that the driver isn't working properly, it can not start the device with a code 10 error. If I can fix that I know the lgup programming will run. The problem is because the PC can't communicate with the PC in download mode because of some driver issue.
I'm going to have to carry on tomorrow as I have to go to work and the Mrs needs her phone here while she sleeps

The Gingerbread Man said:
Your English is fine I understand perfectly, in fact I wouldn't of guessed it's not your native language so don't worry! Iv taken photos of my screen. You will see when the phone is turned on normally the host and client can both see the device and adb shows the device is detected and returns the serial number, all good there. The last photos shows when it's in download mode and that the driver isn't working properly, it can not start the device with a code 10 error. If I can fix that I know the lgup programming will run. The problem is because the PC can't communicate with the PC in download mode because of some driver issue.
I'm going to have to carry on tomorrow as I have to go to work and the Mrs needs her phone here while she sleeps
Click to expand...
Click to collapse
Please, enter download mode and change in Windows COM port from #3 to #41 and try LGUP method . It's up to you what method (upgrade, full wipe) you choose.

OK sounds straight forward enough. As I say il have to try tomorrow as I'm at work now and left the Mrs with her phone at home asleep, she will be working night shift so it will have to be when she is back home. I really appreciate the help and il post again to update how I get on

Where I am now is no further, iv tried changing the port to 41 through device manager. Iv set the port 0041 in virtual box for USB settings. Iv tried several sets of drivers. What keeps happening no matter which set of drivers I use when the phone goes into download mode mtp stops working and stops the phone communicating with the PC. When I restart it will work normally for a while but go wrong again. If I try lg up and starting the upgrade in download mode it gives me an error saying it can't change to download mode if I choose refurbish or upgrade. Lg PC suite just hangs at 0% and returns an error after a while. The 2014 flash tool will get as far as trying to flash but hangs at 4% and returns an error but doesn't specify what. I really don't know what else I can do. When these programs reboot the device into download mode it disconnects the device from the virtual machine and I can't get it connected again quick enough before errors are returned or mtp stops working which requires me to reboot the VM or phone. The only thing I can think to do is try on another machine. If it was my phone I would of thrown it out the window or under a bus. Lg software is unusable through virtual machines and I am not buying a new PC just for this lol Il see if I can use someone else's. I hate being defeated, iv have spent probably some 16 hours and got no where! Why can't they just release an ota? It only strengthens my belief in nexus and fastboot. Sorry for the rant but this really has got under my skin and I don't like giving in
Edit
I'm just as annoyed with windows as lg at this point. I really don't like using it. Grrrr

LGE Androidnet USB Serial Port

Hey guys,
I have an LG G3 - D855 phone .. on Stock Marshmallow 6.0 .. and it IS working fine ..
The thing is i want to return to Lollipop, so i decided to use LG Flash Tool to reset the phone to its original state
I Press volume up while the phone is off, then connect it to USB .. it goes into download mode ... but in Device Manager it shows ONLY ONE port " LGE Androidnet usb serial port " .. and of course i'm unable to use LG Flash Tool
I exit download mode .. turn on the phone ... connect USB .. ONLY THEN that i can see "LGE Mobile USB Serial Port" .. i mean it shows ONLY When the phone is ON
I've tried so many Drivers ... even the latest one .. on LG site " LGMobileDriver_WHQL_Ver_4.1.1 " .. Yet no result ..
Is there anyway to fix that ?!
Have a nice day!

@tute123456

Have you tried changing the com port to 41 while in download mode.

You rom file it is .tot or .kdz ??
Sent from my LG-E980 using XDA-Developers mobile app

unnistall drivers, restart your pc and install drivers again, change usb port, download Last drivers from official website of LG

tute123456 said:
unnistall drivers, restart your pc and install drivers again, change usb port, download Last drivers from official website of LG
Click to expand...
Click to collapse
i cant get the LGE Mobile USB Serial Port to come up at all and losing my mind. any help please

looking for help with this, same issues.

LG G3 855 Imei/Baseband and QPST Problem

Hi Everyone,
I am new to this Phone had the maybe unfortunate opportunity to buy a lg g3 855. It has the Imei Null Problem and the baseband is showing as unknown. I thought well that shouldnt be to hard to fix (silly me).
Phone works fine except 2g/3g so no signals at all ofc.
Downloadmode,TWRP,Root is available. Stock Rom MM 30b.
So now the Problem, i thought i can just replace the Imei with QPST/RF_NV_Manager and in the worstcase flash the 855.qcn file from the forum. BUT
I just cant get QPST to recognize my phone. I installed all Drivers LG/LGMulti/Qualcomm/ADB, and it shows in device manager ast certain things but if i try to get them in QPST, they always show NO Phone/ NO ESN and therefore no connection possible. I flashed older and newer Stock Roms and i start to think that guy i bought the phone from had a major screwup ^^.
When I try to get into Diag Mode with the hidden menu,usb debugging and so on the phone doesnt really show up anymore. With Mtp i have 3 entrys in Device Manager(but they dont work either)
LGE Mobile ADB Interface
LGE Mobile USB Composite Device
LGE Mobile USB SerialPort
LGE Mobile USB Modem
With Load only there is none
I also dont get the option to choose Software Download option from Start clients menu when i insert the USB Cable
I Hope someone can help me i literally tried everything except wiping partitions because the tools always shutdown somehow.
Thanks for Reading and Help your Tritratrulala

tritratrulala390 said:
Hi Everyone,
I am new to this Phone had the maybe unfortunate opportunity to buy a lg g3 855. It has the Imei Null Problem and the baseband is showing as unknown. I thought well that shouldnt be to hard to fix (silly me).
Phone works fine except 2g/3g so no signals at all ofc.
Downloadmode,TWRP,Root is available. Stock Rom MM 30b.
So now the Problem, i thought i can just replace the Imei with QPST/RF_NV_Manager and in the worstcase flash the 855.qcn file from the forum. BUT
I just cant get QPST to recognize my phone. I installed all Drivers LG/LGMulti/Qualcomm/ADB, and it shows in device manager ast certain things but if i try to get them in QPST, they always show NO Phone and therefore no connection possible. I flashed older and newer Stock Roms and i start to think that guy i bought the phone from had a major screwup ^^.
When I try to get into Diag Mode with the hidden menu,usb debugging and so on the phone doesnt really show up anymore. With Mtp i have 3 entrys in Device Manager(but they dont work either)
LGE Mobile ADB Interface
LGE Mobile USB Composite Device
LGE Mobile USB SerialPort
LGE Mobile USB Modem
With Load only there is none
I also dont get the option to choose Software Download option from Start clients menu when i insert the USB Cable
I Hope someone can help me i literally tried everything except wiping partitions because the tools always shutdown somehow.
Thanks for Reading and Help your Tritratrulala
Click to expand...
Click to collapse
Everyone with the same Problem have a look in this Post Page 19
https://forum.xda-developers.com/lg-g3/general/request-3g-2g-lte-d850-t3300908/page19#post79462351