yashsingh1/xdaforums huggingface dataset:
[LG G8 Guides, News, & Discussion] ORLYROSA13:
I HAVE A QUESTION REGARDING THE NETWORK LOCK IF I CHANGE THE SOFTWARE IT UNLOCKS MY MODEL IS THE LG G8X THINQ LM-G850UM BY SPRINT?
[LG G8 Guides, News, & Discussion] AsItLies:
No, it does not network unlock the device.

It used to be, that changing the rom would unlock it, but LG fixed that some years ago.
[LG G8 Guides, News, & Discussion] DiegoKcrz:
Dear how are you, here I am asking again, I have some doubts, many already know that to restore the S/N the FTM of the backup is flashed with the "QFIL / partition manager", I only had to put the G8x in emergency mode (screen black) and load my FTM, my question is, "then it restarts?" Or I just turn it on normally and go on with my life.

Another doubt I have is that a colleague did the whole process, she has a dual sim G850em and when the cross flash finished she had no signal, she got scared and returned it to android 10 and then android 9, she got the warning that she should not downgrade but now it has no signal, do you know which partition to flash to solve?, thanks to all.
[LG G8 Guides, News, & Discussion] alvxda:
i have an lg g8x from at&t and i need the 900 band on 3g and 4g. If I update with a firmware that has these bands, will I be able to work on the phone?
[LG G8 Guides, News, & Discussion] AsItLies:
Hmmm, you mean "will it be able to work on the phone" right?

So a few things, if the sim is unlocked, you should be able to crossflash to a rom that has the bands you need. But, be aware, at&t doesn't make their firmware available (kdz). That means if you don't completely backup your current rom, you won't be able to easily get back to an at&t rom, assuming you might want to.

If the sim is not unlocked, it would be best to figure out how to do that now, while u have the at&t rom installed and it's (probably) an earlier version of android.

cheers
[LG G8 Guides, News, & Discussion] alvxda:
my lg g8x stayed in fastboot mode after trying to do crossflasing :( any solution? I have the backups but I can't get into edl mode
[LG G8 Guides, News, & Discussion] alvxda:
After hours I managed to recover and install the firmware that I wanted https://lg-firmwares.com/downloads-file/26603/G850EMW30f_00_0114 .

the bad thing that now I don't have 4g :/
[LG G8 Guides, News, & Discussion] damod11:
Which country are you in ? And which carrier do you use ?
[LG G8 Guides, News, & Discussion] Vitiok70:
Hi, I'm stuck at step C, because LGUP doesn't work well in any form, it tells me that the device is not connected, but in reality it is connected in EDL mode. What can I do to make LGUP work and see my device?
[LG G8 Guides, News, & Discussion] damod11:
take a look at step B 3 & 3.1 again. you should boot into DL mode not EDL
[LG G8 Guides, News, & Discussion] diegojassiel:
Any idea, everything goes ok, but in LG UP im getting 0x6004 CrossDL error?
[LG G8 Guides, News, & Discussion] Vitiok70:
Yes, you're right, I've already seen it, but the phone is not in Download mode. If possible, explain steps B 3 and 3.1 in more detail, because something is not going well. Thanks for the reply.
[LG G8 Guides, News, & Discussion] netmsm:
Restart the phone by pressing and holding power and vol- buttons for about 10-15 secs.
[LG G8 Guides, News, & Discussion] Yennu:
Can someone share the LG V50 patches?
[LG G8 Guides, News, & Discussion] Klklkl00:
I am getting the same error when i try crossflashing fron sprint to open_us and i think i followed all the steps correctly

Edit: I backed up and erased these partitions in addition: boot_a, boot_b, vendor_a, vendor_b, product_a, product_b and it seemed to work afterwards.
[LG G8 Guides, News, & Discussion] damod11:
hi. This version of LG UP will not open in windows 7. Ive tried with the phone in DL mode, without phone connected, compatibility modes changed in properties. Does it only run on win 10 ? Can I use a different version of LG UP ?
[LG G8 Guides, News, & Discussion] rifay78:
Could you help me about this

Lmv600am
[LG G8 Guides, News, & Discussion] diegojassiel:
Thanks, did the same and worked.
[LG G8 Guides, News, & Discussion] rifay78:
I need help about this lmv600am
[LG G8 Guides, News, & Discussion] Ratty696:
Hell yeah!!! after over 2 months of screwing around I finally got my phone working again!!! went from AT&t to soft brick to hard brick to crossflashing and now it works!!! thank you so much!! now I gotta try to get my G8x from hard brick to work
[LG G8 Guides, News, & Discussion] rifay78:
Tell me the steps to fix it
[LG G8 Guides, News, & Discussion] Vitiok70:
The way it flashed helped me a lot. I flashed my sprint to the latest European version Android 11 v.30c. kdz. But I have a problem that, every time I restart my NT code notice of system incompatibility, Lg mobile switch does not work, it turns out that my phone is not certified in Google Play. All that changed after the flash. Otherwise, the device works flawlessly, the Sprint system doesn't even match this European .... That's about it.
[LG G8 Guides, News, & Discussion] AsItLies:
If the device is rooted, it's pretty easy to fix the nt-code error, but, it doesn't really affect anything, only shows up at boot time.

Not sure about lg mobile switch, no familiarity there.

To get the 'device certified', you have to disable vbmeta, also need root for that too. But also, it's never had a negative impact to leave as is, afaik.

cheers
[LG G8 Guides, News, & Discussion] Ratty696:
First I had to follow this guide to get it to boot into download mode again https://xdaforums.com/t/tutorial-rescue-from-hard-brick.4351389/

For some reason had to flash the abl_a and abl_b with development abl file to get it to load in download mode then I was able to follow this guide to finally cross flash with CAD Open kdz. Make sure you follow the steps carefully and use the version of lg up that it says to use in this guide
[LG G8 Guides, News, & Discussion] rifay78:
Thanks
[LG G8 Guides, News, & Discussion] Vitiok70:
Thanks for the reply. I tried to fix the NT code issue with the "cust_path_mapping" archives but to no avail. I can't do anything with the QFIL method, because I don't have the NT code for Sprint's LG V50. Do you know any way to handle the problem of NT code and Googl certification? I have vbmeta disabled and the phone is rooted. Thank you

One more question; I flashed the phone to the latest European version 30c downloaded from the LG page. Maybe I needed another version that wouldn't bother me like that?
[LG G8 Guides, News, & Discussion] AsItLies:
for the certification, you need vbmeta disabled with fastboot, did u use fastboot? Also, once disabled, you have to delete cache / data of google play app, then it will work.

the nt code error -- you simply need to put the correct code, it will tell you the one it's looking for when it boots up, in the error, it's that code that goes in cust path mapping.
[LG G8 Guides, News, & Discussion] ArmandBeta:
Hola, lograste actualizar por upgrade ?? por particion saca error, por otro lado no pude volver al modo emergencia EDL para hacer todo el proceso :(

Mod translation via GT: Hi, did you manage to upgrade? by partition it throws an error, on the other hand I couldn't go back to the EDL emergency mode to do the whole process :(
[LG G8 Guides, News, & Discussion] Vitiok70:
As I commented in the previous message I vbmeta disabiltata and of course that by fastboot, in another way I do not even know. I removed the cache and data in Google Play, but now name it sees installed applications, worse than it was, and remained equally uncertified
[LG G8 Guides, News, & Discussion] Vitiok70:
Hi, a question for sprint owners, who did you go to what version of stock did you go to? In your opinion, which version is the most stable and worth putting through crossflash? Thanks
[LG G8 Guides, News, & Discussion] mpena:
I didn't try. I realized clean installation of new kdz
[LG G8 Guides, News, & Discussion] kazi69:
Should this work on previous models , like G6 ?
[LG G8 Guides, News, & Discussion] AsItLies:
You should look in the threads for the G6 guides to find threads re crossflashing. This method for the G8 is due to changes LG made way after the G6 was new. The G6 should be much much much easier.
[LG G8 Guides, News, & Discussion] kazi69:
Thank you for prompt reply!
[LG G8 Guides, News, & Discussion] igorya79:
hi, i have LG G8 LM-G820 (Verizon)

what am I doing wrong? I get an error:
[LG G8 Guides, News, & Discussion] AsItLies:
A sahara error is quite common and can happen for many various reasons, unfortunately.

1) be sure to use a usb 2.0 port, not 3.x port

2) sometimes you have to change windows to allow 'unsigned' drivers to run

3) be sure when the device is in edl mode and connected that it's recognized properly in device manager. If not, load the appropriate driver for it

4) some have had luck just switching to a completely different computer

qfil is older software, but once you get it working, it's fine and very beneficial.
[LG G8 Guides, News, & Discussion] reachforthesky:
Successfully flash a Sprint unlocked G850UM20P to G850QM30B (NAO version). I am on T mobile. I happen to have both versions of LG G8x.

I originally only tried to activate VoLTE on the G850UM20P. I did the minimum by uploading the modded abl_a .bin to both a and b locations. Success . The phone booted up with T-Mobile logo and configured volte, WiFi calling and video calling. The switches were grayed out however. Everything worked except I lost Download mode.

After a few days, I decided to cross flash to G850QM30b, just like the other phone I already have.

I first Qfil/upload the original abl_a and abl_b back and get the download mode back. Then I followed OP's instruction and crossed flash to G850QM30b. It worked except the NTcode error. There were multiple NTcode warnings. But after a couple of reboots, it was down to NTcode:0 error.

I tried the re-flash approachs but LGUP would not allow.

Then I compared SVC/MID info/NT code in both the cross-flashed and the unmodded . The cross flashed one has 0,fff,fff,ffffffff,ffffffff,ff vs 1,fff,fff,ffffffff,ffffffff,84 in the unmodded one.

Also FTMmodelname was blank vs QNA in the unmodded one. So I made two edit and the NTcode:0 warning is gone. Not sure if I needed to edit FTMmodelname.

Oh yes, the cross-flashed phone has volte and WiFi calling, but the switches were grayed out. I switched back to the the cross-flashed phone as my daily driver. Will see what happen when T-Mobile shut down 3G on May 30 when Volte is needed.

BTW, a big thank you to Netmsm for being so helpful to so many.
[LG G8 Guides, News, & Discussion] Saddique ahamed:
Lm v450PM (v50) same process?
[LG G8 Guides, News, & Discussion] netmsm:
Not sure! You may give it a try and inform us =)
[LG G8 Guides, News, & Discussion] Vitiok70:
Yes
[LG G8 Guides, News, & Discussion] mateus.sc:
@netmsm hello! hope this message find you doing well.

Fixed <3 THANKS
[LG G8 Guides, News, & Discussion] reachforthesky:
I have 2 used unlocked LG V40 from eBay; V405UA20g and V405UA20e. I cross-flashed them to V405QA20e. There were no gain expected because the original 2 already have volte and wifi-calling on T-Mobile. The after-flashed "open" version have the same things. But I "lost" the serial numbers and "gained" fastboot no command error on both phones. I look up the saved ftm.bin and found no serial number (may be the seller had done something to the phone). Lesson: people should write down the serial number before flashing.

Q:

1. How can I "find" the serial number?

2. How to fix the fastboot no command problem?

Edit: I've cross flashed a LG G8x from G850UA A10 to G850QA A11 with serial number and fastboot function intact.
[LG G8 Guides, News, & Discussion] netmsm:
Hellooo :cowboy:
[LG G8 Guides, News, & Discussion] netmsm:
There's a relation between SN and IMEI. To recover SN one can restore IMEI in PDM mode. So the instructions will be:

1. Find a way to get into PDM mode.

2. Use tutty to send commands to the phone.

3. Try writing IMEI using tutty.

3.1. Replace 000000000000000 with your IMEI and hit enter: at%imei=000000000000000

3.2. You should get OK otherwise it does not work.

4. If it succeeds then the SN will be recovered.

Notes:

1. To get into PDM mode, use the attached FTM file. Remember I do not guarantee that it works harmlessly and effectively, so have created backup beforehand.

2. You may need to erase LUN5 partitions to make it possible writing IMEI in PDM mode so again create backup of LUN5 and erase it.
[LG G8 Guides, News, & Discussion] AsItLies:
A sahara error could be caused by many things (qfil is older software), but it's usually either an unsigned driver (it will tell you that when u install the driver - but u have to pay attention).

Or it's because you aren't using a usb 2.0 port. Older software, wasn't designed to work at usb 3 speeds. Also, try a diff usb cable (a data one, not a charge only one).

cheers
[LG G8 Guides, News, & Discussion] Tangook:
Thanks very much for this instruction, I tried and succeed the third time (Fail before with LGUP has only 3 option so decided to flash anyway and got a boot loop so I start over again).

Mine is G8 Sprint (Refurbished) it's stuck on A9 and 2019 security patch when I got it. Search all over Internet for the way to get it updated the month before, nearly pay for the unlock service guy for this.

Now on Open CA A10 and hope to receive OTA A11 when come out. (Even if still not get OTA now I can use the procedure to get it)
[LG G8 Guides, News, & Discussion] asusm930:
we still cannot flash a modified OP partition on locked BL right? Just wondering because i'd like to get volte working by a modified op
[LG G8 Guides, News, & Discussion] AsItLies:
Not sure what u mean by a 'modified' OP partition, I'm guessing a changed totc file? Then, no, it won't work.

but this guide points to a way to accomplish what u want without having to modify OP totc file. And it will get volte working if the xflashed kdz has it working within it's OP partition normally (without mods).

cheers
[LG G8 Guides, News, & Discussion] asusm930:
yeah basically i want to edit the config files for volte (missing from any variant unfortunately) in OP and flash it back while BL is locked. Guess thats not possible.
[LG G8 Guides, News, & Discussion] AsItLies:
nope, not with the bl locked. No need to guess, it's not.
[LG G8 Guides, News, & Discussion] sasindu:
Thanks man. Successfully changed my LM G820n (Lg G8) from sk telecom to open korea firmware.

Lets say i want to again flash a us firmware version, should i again follow this from the beginning or can i just flash from lg up?

And does anyone have an idea why my g8 doesnt have fastboot mode?

Thanks
[LG G8 Guides, News, & Discussion] netmsm:
Yeah you should do them all.

Fastboot is not accessible by default until a serious problem occurs and prevents phone from normal boot. However, you can access Fastboot with the help of abl, xbl engineering files.
[LG G8 Guides, News, & Discussion] sasindu:
Thanks netmsm.

Can u please give me a small guide on how to access fastboot using abl and xbl engineering files. Although i achieved this step i dont know much about this. Highly appreciate if u can help. Thanks.
[LG G8 Guides, News, & Discussion] netmsm:
Using QFIL, create a backup of abl, xbl and xbl_config of both a and b sides and then flash attached files. abl_eng to abl, xbl_eng to xbl and xbl_config_eng to xbl_config. Like backing up, flash both sides (a and b).

Restart phone while it is connected to USB port and you are holding Vol-. It will get into Fastboot.

When you are finished with Fastboot, use the backup files and flash them back using Fastboot commands. Fastboot flash abl_a abl_a_bak.bin and...
[LG G8 Guides, News, & Discussion] sasindu:
Thank you very much netmsm. Ill try this guide.
[LG G8 Guides, News, & Discussion] sasindu:
AsltLies, can you please give me a small guide on how to proceed with this. Specially how you edit with the hex editor. Seems i also have lost my serial number. Luckily i have it on my phone's back sticker.

Thanks
[LG G8 Guides, News, & Discussion] AsItLies:
Well different hex editors behave somewhat differently. I use hexedit under linux. It's a basic hex editor but does what I need. If u don't have linux I'd suggest to search google for a simple one for windows.

essentially, you need to get to specific offset, 12000, and at that point is the first character of your s/n. Continue to enter it in, as far as the s/n goes. Then save it and flash it back.

Before doing any of these though, make backups! Backup what's there (untouched). And, if u have the original ftm, before having done anything, u could flash that back, as it will have the s/n in it already.

cheers
[LG G8 Guides, News, & Discussion] sasindu:
Thank you AsltLies, well i do have the backed up ftm during the above process. In fact i do have all of them, but i cant identify which is ftm. I have attached a screenshot here. Is there anyway u could identify it among the files.

Thanks.
[LG G8 Guides, News, & Discussion] AsItLies:
The ftm backup I have for my G8 is about 35 meg in size. If u have one about that size u could try flashing it. But remember, back up what's there now.

And, it would be a very good idea, when u do a back up of any partition, go to that directory and re-name it to what it actually is :)

Also, I've read that in the header info of those files, the actual partition name is in there, but u would need a hex editor to look at it.

cheers
[LG G8 Guides, News, & Discussion] asusm930:
hook up your phone to PC and get into qfil partition manager, and get the name of the backup there. it will match with the backups you did
[LG G8 Guides, News, & Discussion] sasindu:
Thanks man. Will do.
[LG G8 Guides, News, & Discussion] sasindu:
Thanks man. Ill search for one with that size. I forgot the renaming part. My bad.

Will try this. Thanks
[LG G8 Guides, News, & Discussion] slashduff:
Hi, I was trying to follow these instructions with a Sprint G820UM (locked BL, no fastboot) so I can get Wi-Fi Calling on Freedom Mobile here in Canada. However, LGUP 1.16.0.3 threw an 0x5319 error (SPR_US -> OPEN_CA) even when I unchecked SID_1 and SID_2. I don't know what I'm doing wrong.

I deleted the correct partitions in QFIL. (I know this because the phone ended up bootlooping, and I was able to fully restore it with the backup partitions I made.)

I made sure UI_Config.lgl was read-only.

I have all the correct drivers, to my knowledge. In EDL mode, the phone is recognized as COM15.

The only things I can think of are, maybe the current ROM on my phone isn't 20j, or I got the wrong 20j ROM (I got it from HalabTech instead of lg-firmwares, since the former hosts on Google Drive).

In any case, I finally got the lg-firmwares OPEN_CA 20j ROM on my PC late last night, but I'm nervous trying again in case I get another bootloop. Please let me know if you have any questions or if you'd like to see any screenshots. Thank you.
[LG G8 Guides, News, & Discussion] netmsm:
Hi =)

Please give me screenshot from "Download Mode" before and after performing "part B" instructions.