yashsingh1/xdaforums huggingface dataset:
[G3 General] Hnk1:
I came here out of curiosity. Next time quote me if you expect a reply.

What you need to do is flash a QCN. I can try to repair your imei number and send you back.

What I will need is your imei number(remove your battery and see under it), model number and your qcn file. Make sure you inbox me these details and I will try to repair it for you.

Good Luck
[G3 General] adil.ali.503:
As I told you that the body of the cell is from d855 and the sticker on the back is also false one with the imei of a d855
[G3 General] Hnk1:
I can provide you with a qcn for device d850 but make sure you backup your own. Tell me if you would need it.

Also, the best thing would be that you send me your qcn and i try to repair it and send it to you back,

But i think the best thing could be to provide you with NV values. let me see if i can work something out.

QCN for d850

https://www.sendspace.com/file/ak2hkl
[G3 General] adil.ali.503:
Can you confirm that 2g,3g and 4g is working with that qcn

And a question for safety that what can happen at most if something goes wrong
[G3 General] Hnk1:
MAKE A BACKUP OF YOUR QCN. either using QPST or using TWRP (TWRP from xda as it can also backup EFS)

I flashed many and i had none problems. As long as you do have a backup to go back to. There is no problem.

PS : Share your qcn and maybe I can try to repair it. I got NV values from my device.

If your friend has the same device. Grab qcn from him too and we can work something out as well
[G3 General] adil.ali.503:
I already have a backup of efs I made by twrp

Is it all I've to do?
[G3 General] Hnk1:
Although it is enough but i will go ahead and make a backup of qcn using qpst.
[G3 General] adil.ali.503:
I'm uploading my efs to Dropbox, I'll give you the link than

Can I just restore the efs files if you can provide me coz I don't want to mess with qpst

It's a bit difficult to me as I'm just a noob
[G3 General] pjl3dm:
Hi I have a D855 LG G3 and I have the same exact problem, my 2G works perfectly fine but I am no longer able to access LTE or 3g (signal shuts down when I switch to 3g or LTE mode, Service is disabled).

My IMEI is fine and is not lost... I can see it in About screen, I have tried installing different lollipop modems and even downgraded to Lollipop and Kitkat rom and even tried Cyanogenmod 12.1, I never had the signal back on.

Can you please share the LG D855 QCN? I have no idea where to get it, googling has not gotten me anywhere, I saw a SINGLE site where I could download it but it had a password.
[G3 General] Hnk1:
Well, i will tell you step by step how to make a backup of QCN and how to flash QCN. It will be fine.

How did you manage to back it up ?

Mate you sent me EFS which means I need to use it on my device and then fix it and then send you.

Can you manage a QCN ?

It is very easy. Let me get back to you by night but I WILL PREFER QCN

Check your inbox. Tell me the result. And always remember : BACK UP BACK UP BACK UP FIRST
[G3 General] adil.ali.503:
Did you checked your hangouts
[G3 General] Hnk1:
here you go.

Just run restore via twrp and your imei should be fixed. Good luck

I will appreciate if you tell me if it worked for you!
[G3 General] adil.ali.503:
Sorry to say it doesn't work

Imei is still 0 and I can't get any 3g signals

I think its the problem with the frequency band

Thanks for your help ?
[G3 General] ItBankRock:
I'm still getting 4G LTE signals but it seems that I cannot get any data at all (any website can't load). Will this help solve it?
[G3 General] XFRN635:
Can you repair my qcn 2g 3g woelrking 4g not working
[G3 General] barron9:
its hardware related if signal drops randomly or says simcard removed ...
[G3 General] dexter1260:
do you a tut for Samsung j710gn? after i flashed openline xtc firmware my phone can now use other network but only in gsm not data 2g,3g or even 4g TT
[G3 General] tritratrulala390:
Hello i was reading alot in your post and i think you could be the Solution to my Problem.

My Phone is the LG G3 855

I have an EFS Backup from TWRP not 100% sure if its working , but i am missing Baseband and Imei. I just cant get QPST to recognize my phone thats why i cant do it myself. I saw you made a flashable zip for twrp with the efs and imei inside. Could you maybe help me out and or make me one?

If you can help me just say something and i will pn you the imei.

Thats the link to my Post maybe there is something in i forgot or was important.

https://xdaforums.com/lg-g3/help/lg-g3-855-imei-baseband-qpst-problem-t3926860

Thank you
[G3 General] Hnk1:
[MENTION=7633827]superdestructor[/MENTION]

Hi

Check your inbox I will send you some information regarding your problem. I will attach an IMEI free backup of the device I had so you can flash the partitions. Remember my backup also contains boot.img and other partitions so if your device is different, be very careful and only flash selected partitions. If I remember correctly there are about 40 or so partitions for LG G3
[G3 General] tritratrulala390:
Hi

I literally just fixed it 5minutes ago was just on my way to post how i did it. The Magic thing was to delete the 3 Partitions from your first post. The moment i did that. every Program worked. QPST/EFS PROF/LG Z3X. The No Phone thing went away and everything worked flawlessly.

I could flash the QCN and repair my Imei in minutes. I am sorry you did the work but for everyone else with the problem that your phone just isnt recognized, that could be the solution. I backed everything up beforehand with EFS Professional, and TWRP at least that worked before.

I thank you alot for your help LTE and i guess 3g works? i unfortuanetly can not see if its 3g but Internet/calls work i tried :).
[G3 General] Hnk1:
that's great mate. I am glad everything worked out.

Just for your reference and others, I am attaching the backup link here so everyone can benefit.

https://mega.nz/#!zw8zHCpT!Oepsetz5KUuhS46aV7m5PdfBYruudHGEbG_TWCEX5Z0
[G3 General] atahanacar:
I was about to lose my mind. This fixed my issue where 3G would work but 4G wouldn't. Thanks :)
[G3 General] Akashpadwal:
lg g3 d855

bro please can you help me.I got lg g3 d855 32gb version 30e .I lost my imei and baseband .I can't even root my phone with any software, I almost tried everything but was not able to root.Qpst doesn't allow me to backup qcn file. I can't even find tot file for d855 30e so that i can flash it and atleast bring back modem .Is there any way that i can fix this?
[G3 General] Akashpadwal:
z2x cracked

I got the same lg g3 Problem .I just wanted the z2x tool I cant find it and your link is also not working.please can give me the link.
[G3 General] gendon:
Hi.. i was wondering, perhaps anyone here can help me out with my issue... I was messing with my hidden menu (baseband and network things). So the problem now is, if i'm using hutchison operator, sim card only get 4G. Cant connect to 2G/3G. But if i change sim card to another operator (telecom), it gets all networks (2G/3G/4G).

I've tried The hutchison sim card moved to other device/phone, no problem with the network. 2G/3G/4G works well.

So i think, the issue is on my first phone. Its like blocking hutchison sim to connect to 2G/3G.

So my question is, anyone knows which hidden setting/NV value are blocking hutchison signal to connect to 2G/3G ??

Maybe [MENTION=5022682]Hnk1[/MENTION] knows something?

Thanks in advance.
[G3 General] Hnk1:
I have updated first post for you how to use QPST to backup and restore qcn. I am attaching QCN for you to restore it.

Another method you can do is, boot into diagnostic mode and instead of using QPST, use EFS Professional and use Qualcomm NV tools to repair your imei.

Kindly elaborate and give as much details as possible, Which device are you using ? THE ATTACHMENT IS NOT FOR YOU AND CAN BRICK YOUR DEVICE OR STOP YOUR DEVICE FUNCTIONS FROM WORKING
[G3 General] pjl3dm:
Thanks Mate, I will try this later on. You are a good person and a very helpful one.

Though I have 2 questions:

1) How did you check your "current" QCN file that got corrupted? I also want to confirm if my current QCN file is corrupted (to check if the size is small). So far I am able to backup my EFS partition in TWRP but I have no idea to extract my current QCN from the backup.

2) Will the method of restoring the QCN you posted work for Marshmallow? Im using Fulmics Rom 3.5 which is Marshmallow based V30B.

3) If I ever screw up my EFS partition can I re-partition it? (I think I may have screwed it up by upgrading to Marshmallow then downgrading to Lollipop), I heard somewhere that Marshmallow partitions have slight difference from Lollipop.

Thanks!!
[G3 General] adil.ali.503:
I think I've to unlock WCDMA 2100 band to use 3g on my d850
[G3 General] dark_prince:
D850 is 3G/4G compatible with Pakistan, so is D855.

Are u on LG-stock based rom? you can select 3G band to be 2100 form hidden service menu on either MM or LP stock-based rom (Fulmics, Cloudy, stock etc)

Sidenote: I have exact same problem of no 3G/4G but 2G works fine, I have IMEI and everything intact, nothing lost, and I do not understand how to change NV value in all of this tutorial to restore IMEI. Once I get cleared steps, I will not proceed to reflashing QCN of another IMEI number nad in-turn replace the original IMEI without a restoration method.

Have u flashed original stock tot to actually see that your efs partition isn't lost?
[G3 General] adil.ali.503:
I provided my efs backup to HNK, he said there's nothing wrong with it
[G3 General] dark_prince:
restore stock tot, then root > unlock bump TWRP > flash stock based lollipop with 21q or 21r radio. Report back the results.
[G3 General] adil.ali.503:
Are you sure it'll work, and I don't know the method of tot

I tried to understand it in a thread but it just flew over my head

---------- Post added at 03:45 PM ---------- Previous post was at 03:38 PM ----------

I've tried selecting the 2100 band from hidden menu on fulmics rom but still I didn't got the 3g signals

2g and 4g works fine
[G3 General] dark_prince:
Ah, your phone is fine then. Have u double checked the APN? and did u subscribe for a 3G data package? Try setting to WCDMA only from Network Mode settings.
[G3 General] adil.ali.503:
Yes I've tried these all
[G3 General] Hnk1:
1. I did that on marshamallow Fulmics 4.2 with no issues. Just make sure you got all proper LG drivers installed.

2. I made a backup of my QCN using different tools. It was only 32kb rather than original size around 500kb.

3. I have already made that mistake and EFS doesnot detect my partitions as well. Device works perfectly fine. I think if EFS supports Marshmallow again, it won't be a problem at all. I made 4 backups of my QCN and important partions (TWRP, QPST, NV TOOLS, EFS). Unfortunately EFS partitions got messed up but I still have 3 working backups. The best being TWRP

No you do not. I used your QCN to my device (which had no imei number) and even repaired it later (gave you a registered imei number) and it worked both times for me. You do not need to unlock any bands as D850 supports 3g bands in Asia (2100mhz) and i have used 3g on the same band as well from your QCN.

I am surprised that your imei didnot get repaired as i repaired it using my device and it worked perfectly. Did you try the QCN as well ?

Although your QCN is from D850 but your device maybe D855. I tried flashing QCN across device and I had similar issue. 2g signals were very weak while 3g signals jumped very often to zero.

I suggest you send me a picture of your phone after removing its cover and battery. There are ways to check if the body matches your imei. You can inbox me the details for privacy reasons.

Check these three images. They have models written on their body as well

http://icdn1.digitaltrends.com/image/lg-g3-work-review-back-cover-off-1500x1000.jpg?ver=2

http://acurrie.me/wp-content/uploads/2014/07/g3-02-back.jpg

http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2014/05/IMG_2180.jpg
[G3 General] adil.ali.503:
Thanks for detailed explanations bro

But I want to clear it that my cell is d850 as I've flashed many d850 roms on it

And on the body its all changed by the shopkeeper, the sticker is of d855 and on body its also written d855

So I'm sure about it that its a d850 coz I'm able to flash every d850 rom on it

---------- Post added at 10:00 AM ---------- Previous post was at 09:58 AM ----------

Serial number also doesn't matches with the body
[G3 General] Hnk1:
Did you try to restore QCN?
[G3 General] adil.ali.503:
I haven't tried it yet as I'm unable to put my device in diagnostic mode

Btw the efs files you gave me, I'm only able to get 2g signals with them
[G3 General] Pelau76:
Network signal

Good night, is podible use this method in a LG G3 D851 .

From already thank you very much
[G3 General] Hnk1:
Any progress ?

Yes . But I hope you understand what this thread is about. You will need to find a QCN for a D851.

Google is your friend!
[G3 General] Pelau76:
LG G3 d851

Perform steps and it worked perfect in my LG G3 D851 .

I was really worried about having only 2G network and intermittent signal . Congratulations and continue working .

Greetings from Argentina:bueno:
[G3 General] m.mujtabab:
hey there i have lg g3 d850 but unfortunately i have lost my qcn im able to find qcn on internet but it doesnt support 4glte my cell is only connecting to 2g and H+. can anybody provide working qcn of d850?
[G3 General] Akopps:
^

Bump. I need a non-corrupt QCN file for my D850 too. The "google method" doesn't work. Perhaps somebody could PM or email one to me?

This tutorial is very promising, but it's useless without a good source of a QCN file. My LG G3 may have arrived corrupted, and I would like to write a new QCN as a last ditch attempt before going through the hassles of returning it to the vendor.

The second issue is that I don't see a path /sys/devices/platform/lg_diag_cmd/diag_enable on my G3 (it's running KitKat right now).
[G3 General] Alexrr95:
I get the message '' Can't create /sys/devices/platform/lg_diag_cmd/enable: No such file or directory''

I'm really noob about this, what am i doing wrong?
[G3 General] Hnk1:
Do not inbox me for questions. Quote me at a forum and I will reply.

Are you on stock ?

Rooted ?

Even Fulmics should work !

You need to be on stock and rooted
[G3 General] lusotelo:
LG D850

Goodnight. I installed QCN, as my LG D850 only had 2g and 4g, but never 3g, 4g and sometimes went away and did not return. I upgraded first rom a cloudy 2.5 and then install the QCN here. And now not connects 4G.

I can help?

Sorry for my English, it is the translator of google.

Greetings from Argentina.
[G3 General] Hnk1:
You should not have flashed QCN from here as QCN here was broken. You will need a working QCN and providing QCN is illegal as it changes your imei.

Always make a backup in case something goes wrong. Google another QCN on your own.
[G3 General] Alexrr95:
Yes, that was the problem i wasn't on stock i already returned to stock but i've got another problem. Whenever I try to initiate the ADB shell it throws me the following error "error: device '(null)' not found "

That doesn't happen when I initiate it in MTP usb mode but according to other guides i need to be in "Charge only mode" and anyways when i finish to write the script the cell just vibrates but doesn't do anything.
[G3 General] siredux:
Hey there, I have a D855P, I have IMEI (original one) but I'm not able to get any signal, not even 2G, phone is not blacklisted or anything. I've found 2 QCN's and tried to restore them but QPST failed at 4-5% saying "received unknown command..." it even fails with my own QCN backup. Any help?
[G3 General] Colicablb:
i send u a message, im having a qcn problem
[G3 General] izazuhdi:
AWESOME, works like a charm

MANY THANKS to you dude.

i have my 3G signal back on my LG G3 D850, i'm so happy now.

for another peoples who are facing the same issue with me, simply download the QCN file provided above then restore it using QPST.
[G3 General] Hnk1:
I will look into it.

I'm lately very busy so give me some time

D855?
[G3 General] Hnk1:
Glad I was of help
[G3 General] andyarom:
Help with qcn file

Hi!

I have the same problem with 3g in argetina, could you send me a trustful source to download the qcn file? Thank you.
[G3 General] Gonzalo LGG3:
Hello

I also have a LG G3 without 3G and 4 G.

Now i flash FULMICS 5.2 but no changes.

If i restore the QCN ?

where can i find a good one, on google can not find.

If some one can help me please or tell me where ?

Thanks
[G3 General] izazuhdi:
try to seek carefully in this thread, i found the one i used on this thread
[G3 General] izazuhdi:
i'll try to help anyone who's facing 3g network

as i'm glad to get my phone's 3g signal back, here i just want to try to help you guys so you can feel how it feels too

all you have to do is just PM me your team viewer password then let me use your laptop/pc for a a minute or two

if i i make it works you can just hit thanks button to this thread, and say thanks to the TS named Hnk1 and if you think i was help you too you can hit transfer balance on you paypal account lol :laugh: (no i just kidding)
[G3 General] Colicablb:
I used a method that i found in youtube. Changing my imei with that method got 4g working!

Enviado desde mi LG-D855 mediante Tapatalk
[G3 General] siredux:
Can you PM me the link?
[G3 General] Yadro:
Hello.

D855 here.

Problem occurred 2 days ago.

No 3g 4g signal,keeps searching for eternity.2g works fine.

I did follow your guide,downloaded 2qcn files from google but i keep getting these errors

Status: Memory Restore Failed!

Error: Received an invalid command from the phone.

It gives this error at 5%.

I dunno what i am doing wrong.

Attaching screenshot.

Edit : My imei is fine,is not null or 0.

Rom Fulmics 5.3 MM
[G3 General] Hnk1:
[MENTION=7495528]hdmuzzillo[/MENTION]

[MENTION=4292266]Colicablb[/MENTION]

[MENTION=3979613]klajdibushi[/MENTION]

[MENTION=7449796]Alexrr95[/MENTION]

Hi mates,

Sorry I had been extremely busy lately and it is quite hard for me to find time for xda.

Firstly, you all need to understand that there is a software aspect to this problem and there is a hardware aspect to this problem. IT WILL NOT FIX ANY HARDWARE ISSUES.

Furthermore, QCN file has imei number and thus it will change your imei number which is illegal and thus I can not provide you QCN myself because of the issues involved. You will have to google yourself or request someone to send it to you. For D855 users, understand that there are two variants 16gb and 32gb so be careful about this difference as it can cause trouble for your devices.

The way to get a working QCN is first, try to repair your QCN. You will need to get into diagnostic mode (DIAG) using commands as I mentioned in my first post.

Next you will need to use QXDM and find NV VALUE OF 457. If you value is 0, change it back to your imei which you can find by removing your battery. If you used someone else QCN, you can still change it back to your imei number.

For more information how to use QXDM and QPST, find links in further reads in my first post

One place to find QCN is at forumgsmhosting

Second place is 4shared. just search in google

d855 qcn 4shared

and you will find many. I do not take any responsibility of whatever happens to your device. Just backup yours and if you use someone else QCN, change your imei back by editing NV 457 value in QXDM.

Good luck

Update : I attached a blank QCN in first post for D855 variant.
[G3 General] hdmuzzillo:
Hi buddy!

Yes i totally understand the .qcn and IMEI issues related but if you look closely to my case I do have my original IMEI and I dont want to change it. I was already able to restore my original IMEI on any .qcn file using HEX edit

What I need is to know how to find and repair the portion code for 3G and 4G, one file works like a charm at 3G and the other works 4G only, I just need to mix them to create the file I need and keep my original ESN and IMEI on it.

Thanks for all your input!
[G3 General] siredux:
My model is D855P and the QCN backups (d855) I try to restore they all fail at 5%, only one that works is the blank IMEI D855 QCN which OP attached, even though that QCN is supposed to blank my IMEI or leave it 000000000000000, my original IMEI is still showing up. No service yet whatsoever. Any help? I'm rooted, running stock 30a bumped with TWRP
[G3 General] Hnk1:
Mate, can you please provide hex method with steps by ehich you repaired your IMEI. This will be very helpful to other users and i can add it in my original guide making it even more easier for rest of users.

About your query, it seems that in one file 3g values are lost while in other 4g values are lost. What you can do is , flash a qcn with both LTE and 3G working and then change your imei to your original one.

If you want to try, use QXDM and in NV TOOLS, select only LTE /3G and conpare 2 QCN. But it will be time consuming.

If you can tell us how you edited imei using hex , i will change my IMEI to 0000000000000 and upload the file where you can flash my qcn and change your imei to original. But remember, it may take a bit as I am very busy lately. Good luck !

Are you certain it is hardware related or qcn related.

Try flashing a modem using twrp and see. If that doesnt help, reinstall your software using TOT method or KDZ.

After that we can look into your QCN issue. Any more detail how it started will be helpful.

Word of caution : I hope you backed up your previous QCN and I am not sure if a qcn of D855 will work on D855P.

You will need device specific QCN
[G3 General] siredux:
I received this phone as a gift about two weeks ago, already with the no signal situation; previous owner states that issue came out of nowhere, but I'm not 100% positive about that because it came with Cloudy 2.5. Yes, I did a QCN backup. D855P is the same international model but intended for a different region (Latin America), so that shouldn't be a problem. One thing I've noticed is that I can't even make emergency calls. I'm starting to believe this is about a hardware issue :(
[G3 General] hdmuzzillo:
Hi [MENTION=5022682]Hnk1[/MENTION]

Sorry for the delay, bussy days...

Here you have the method to replace IMEI, you just need to convert your IMEI with IMEI converter and do a search to find the right line for IMEI input as the guide is for LG G2 so the line number should vary.

http://xdaforums.com/showpost.php?p=58171492&postcount=13

I would like to use my email box to follow up since I currently pay more attention to email than forums due to workload, once we have results I can post back for the community. Ive my second D850 unit on the way so I can help you with 2 units on testings. Ive sent you my email on PM, feel free to email me your modified .qcn once you replace your original IMEI. I can test it here and let you know if solves the network issues we have with this model in our country.

thanks for your coop! cheers.
[G3 General] Hnk1:
What you can do is mate, send me your qcn file. I won't change your imei. Just repair it send you back. How about that ?
[G3 General] Yadro:
I will send a link via private message in a few minutes.i was so frustated with the phone that i didnt do anything more to it,i am just using it on 2g.
[G3 General] hdmuzzillo:
Hi again Hnk1,

Currently im running the file you posted here but with my original IMEI corrected, This is the file that doesnt work with 4G / LTE

http://xdaforums.com/showpost.php?p=65721941&postcount=9

Here is the other qcn file you have posted and this one seems to work with 4G but canth connect 2G/3G

http://xdaforums.com/showpost.php?p=65773399&postcount=21

Maybe this is a band related issue?