yashsingh1/xdaforums huggingface dataset:
[LG V20 Guides, News, & Discussion] Shirazak:
but you are able to go back to nougat using the root method here right?: https://xdaforums.com/v20/how-to/root-h910-v10m-t3664500/page112

---------- Post added at 04:58 PM ---------- Previous post was at 04:48 PM ----------

So if i flashed the new h910 oreo rom, i can use that same procedure to return to nougat and root right?
[LG V20 Guides, News, & Discussion] clsA:
Yes I was able to restore the 10r firmware and bootloader / TWRP to test the Oreo zip
[LG V20 Guides, News, & Discussion] Furline:
Just flashed this and it seems to be working great.

Thanks!
[LG V20 Guides, News, & Discussion] Jongla:
Been using this for 2 days, does anyone else have a major performance issue?

I mean basic scrolling keeps stuttering, playing PUBG is actually impossible. I check the cpu freq and temperature, phone is not even over 55°C, but for some reason freq doesn't go upper than 1.2Mhz .weird.
[LG V20 Guides, News, & Discussion] clsA:
I don't have any problems my phone runs better than it ever did on Nougat

maybe you should wipe and start over
[LG V20 Guides, News, & Discussion] Saad Luqman:
How can I replace the modem file with mine dump_modem in the stock v10q Zip, so that when I am done flashing I get my signals back.
[LG V20 Guides, News, & Discussion] clsA:
If your the same guy that changed his IMEI to get your phone working you may never get data again

the modemst1 and 2 are linked to your imei .. if you changed it theirs no way to tell if it will work or not.

the back to stock roms do not flash those 2 partitions you would also have to alter the updater-script
[LG V20 Guides, News, & Discussion] Saad Luqman:
Thanks for the reply, but I can revert my IMEI to so that's not an issue, Just want to know if i unzip this v10q zip and replace the modem file, and zip it using 7zip, will it work? or how to make it work? As I tried going back to v10q stock without any signals.
[LG V20 Guides, News, & Discussion] clsA:
The rom does not flash modemst1 and modemst2
[LG V20 Guides, News, & Discussion] Saad Luqman:
I got that, but this rom does flash modem(the 85 mb size file, not st1 or st2, ), so i want that to be my modem_COMxx from dump
[LG V20 Guides, News, & Discussion] clsA:
or use my v20b it has the Oreo modem in it
[LG V20 Guides, News, & Discussion] Saad Luqman:
other modems dont work out for me, I have tried flashing stock roms but eventually I end up getting rooted to flash my version of modem,

So all I just want to know can replacing the modem file via 7zip is safe, because doing so change file properties in (CRC, Attributes and Host OS) of the modem file, and what I am afraid of is that by attempting it any thing goes wrong I can end up with no TWRP in recovery + LGUP wont recognize my phone. Or is there any other method to do it.
[LG V20 Guides, News, & Discussion] Sofiene.Saidi:
Hi, a small question please, I have an unlocked carrier H910, will it remain unlocked after the upgrade ? Have you got please a path to LG UP and DLL tool ? Thanks for your help.
[LG V20 Guides, News, & Discussion] clsA:
yes it remains unlocked but the Eng aboot is overwritten and your phone will be completely stock

the lgup and dll are in my AFH account in my signature and here > https://www.androidfilehost.com/?w=files&flid=281250
[LG V20 Guides, News, & Discussion] Sofiene.Saidi:
Thanks a lot ! I have already a locked bootloader so it is not a problem for me, I heared some poeple who did the flashing have problems with cellular connection, is it right please ? Or juste they haven't done correctly the whole flashing process ? Is it better to reset my H910 before going throught flashing the H915 ROM please ? And Last question, I have downloaded this ROM H91520a_00_VTR_CA_OP_0717.kdz should it be okay for my H910 please ? Thanks again for your help.
[LG V20 Guides, News, & Discussion] ozymandiasmusic:
So I ran this on my H910 after it was rooted and I am now just having a boot loop from the LG logo -> AT&T logo -> back to LG Logo. Any thoughts on what I can do?
[LG V20 Guides, News, & Discussion] runningnak3d:
Have you tried a factory reset? I am guessing that your misc partition is indicating that there is an update to be applied, but when it tries to apply it -- it isn't there. This usually ends up in a TWRP bootloop, but since you are now stock, you are just get a normal bootloop.

If a factory reset doesn't work, you will have to flash the H915 KDZ and root your phone all over again, and then restore back to stock after you are SURE that there isn't an update waiting.

Let me know either way. I have a "last resort" method that will fix your phone, but it will require you downloading FWUL and using lglaf (the tool used for lafsploit) -- dd is your friend :)

-- Brian
[LG V20 Guides, News, & Discussion] ozymandiasmusic:
Hey Brian,

Thanks for your advice. I tried a factory reset with stock, and no dice. So I then flashed the KDZ and it seems to still be in a bootloop. Except now I see the fancy LG Logo animation before it restarts. Plus the phone heats up pretty quick while doing this bootloop... I still have the LGUP dump from the very beginning if that helps? Either way I think I might need this last resort method.

Luckily I no longer am getting RPM crash screens so that is always good.

Kind regards,

Ozymandias
[LG V20 Guides, News, & Discussion] runningnak3d:
OK -- last resort method it is.

Make sure you can get to download mode.

Next read the instructions from the lafsploit thread to get FWUL booted, and all the way to where you would run step1.sh -- but DON'T.

Instead you are going to run:

./lglaf.py
!MISC WRTE,0,256

Now I didn't put them in the code block, but you will need 257 spaces after the 6. So that would be one space after the 6 and then 256 spaces that are going to be written -- if that doesn't make sense -- ASK.

What you are doing is nulling out the code that causes the phone to try and flash an update.

Again, if ANY of this doesn't make sense, please ask for help. *PROBABLY* the worst that would happen if you messed up is that you nuke your misc partition, and your phone would boot anyway, and you could restore your backup -- but lglaf is a very dangerous tool since it has NO error checking (something I really do mean to add one of these day ;) )

-- Brian
[LG V20 Guides, News, & Discussion] ozymandiasmusic:
Brian,

Thanks for the reply, just want to make sure I get this right. I only need to do the following from here: https://xdaforums.com/v20/how-to/root-lafsploit-h918-version-t3773443

Step 1) Download, burn to USB, and boot FWUL on a system

Step 2) Put the phone into download mode

Step 3) Open LG folder, then LG LAF, and enter

git pull
git checkout h918-miscwrte
./lglaf.py
!MISC WRTE,0,256

(At the end of 256 I will enter exactly 257 spaces) (One for the spacing of the command, 256 to write out the rest of the lines)

After the command runs, disconnect the phone, it should automatically power off and then turn on the phone?

-------

Also to be sure, I do not need to grab any other KDZ, Since I already have H91510e_00_VTR_CA_OP_1205.kdz on the phone.

--Ozymandias
[LG V20 Guides, News, & Discussion] runningnak3d:
You got it!

Except it did forget you need:

!CTRL POFF

After MISC WRTE finishes so that your phone will power off when you pull the USB cable. Then your phone should boot.

EDIT: and that firmware is fine.

-- Brian
[LG V20 Guides, News, & Discussion] ozymandiasmusic:
Alright did all the steps, and seems to have gone just fine. However I still have the bootloop. I also tried another factory reset and no change. Thank you for your work with this. What is something else I can possibly do?
[LG V20 Guides, News, & Discussion] runningnak3d:
Well, we can reflash your entire phone since you have the partition dumps, but that is going to take a bit for me to write up the procedure. I will try to write it up tomorrow.

Luckily you already have most of what is needed. You do need to flash a US996 KDZ, and then using partition DL, flash ONLY laf from the H915. That will get you prepared for what we are going to do in lglaf.

-- Brian
[LG V20 Guides, News, & Discussion] ozymandiasmusic:
Hey Brian,

Great, which version of the US996 I should download and have ready?

https://lg-firmwares.com/lg-us996-firmwares/#tab=firmwares

Additionally H915 would be the version I've already flashed onto the device when trying to root?

Thanks for your work on this.

--Ozymandias
[LG V20 Guides, News, & Discussion] runningnak3d:
It really doesn't matter since we will booting straight to download mode and it doesn't matter if the phone works since we will be restoring your original firmware.

Just for kicks though, grab this one: https://lg-firmwares.com/downloads-file/5252/US99610f_00_1205.kdz

So if you already have H915 flashed on the phone, flash all partitions from that US996 KDZ *except* laf.

I am going to have to pull the partition tables from all the LUNs to calculate the offset / size values for each partition that we are going to use with dd because in laf you only have access to the raw LUNs /dev/block/sda sdb sdc etc, and not the individual partitions /dev/block/bootdevice/by-name/boot system etc....

Also, you will need to put all the firmware onto an SD card that is formatted FAT16. Since there is a 2gig limit, we will leave off system. The phone will boot with the H910 firmware and US996 system, and then you can root, and try this again.

For example to flash sda it will be something like:

./lglaf.py
!EXEC mount /dev/block/mmcblk0p1 /data\0
!EXEC dd if=/data/xbl.img of=/dev/block/sda bs=4096 seek=6\0
!EXEC dd if=/data/mpt.img of=/dev/block/sda bs=4096 seek=12294\0
!EXEC dd if=/dev/drm.img of=/dev/block/sda bs=4096 seek=20486\0
etc
etc

Actually we can try just flashing your misc partition first - lol. Maybe that will save us a crap load of time.

Go ahead and get the US996 KDZ flashed, and boot to download mode, load up lglaf and run:

!EXEC whoami\0

FYI - if something goes REALLY sideways, I hope you are comfortable taking your phone apart. You will need to short the 9008 test pins and use QFIL to fix your phone. Luckily, now that we have a working firehose, the only way to brick your phone permanently is if you flashed some ARB1 firmware -- and only the LS997 and H918 are ARB1.

-- Brian
[LG V20 Guides, News, & Discussion] ozymandiasmusic:
Brian,

I am comfortable taking the phone apart if needed but I would need some photos if I needed to short out some pins.

So I have downloaded and flashed the US996 KDZ leaving only the LAF alone. (Interesting side note, after the phone automatically rebooted it asked for a secure login pin, which was surprising)

So I then ran the following command

git pull
git checkout h918-miscwrte
./lglaf.py
!EXEC whoami\0

I received the following:

Hello, I am LAF. Nice to meet you.#

I also have a SD card formatted and I moved all the files except system_COM8 onto it.

-- Ozymandias
[LG V20 Guides, News, & Discussion] runningnak3d:
Well, it is a good thing the phone booted because that should have said root and not "Hello, I am ... blah blah".

Just enter 30 (or however many tries it gives you) attempts, and then it will wipe the phone, and you can start from scratch :)

-- Brian
[LG V20 Guides, News, & Discussion] ozymandiasmusic:
Brian,

I've entered 30 and let the phone erased itself. However I did the commands and still received "Hello, I am blah blah"

Just to be sure, if I do !EXEC whoami\0 with one space between !EXEC I get the error

reader field requires a DWORD, got bytes b'whoami\x00'

Should I reflash everything and try again?

--Ozymandias
[LG V20 Guides, News, & Discussion] runningnak3d:
So when the phone wiped itself, you were back into a bootloop?

Also try:

!EXEC toybox whoami\0

Yes, you must have two spaces between EXEC and the command.

-- Brian
[LG V20 Guides, News, & Discussion] ozymandiasmusic:
Brian,

Yes I am back into a bootloop, however it just shows the one LG Logo, not the moving LG logo anymore...

Also tried your command, I get the same "Hello, I am LAF blah blah blah" message.

Not sure why it keeps doing this. Should I reflash partitions again and start once again from the beginning?

--- Ozymandias
[LG V20 Guides, News, & Discussion] ozymandiasmusic:
Happy New Year!

What are the following steps afterwards? I wouldn't mind continuing to see if I can get this phone back into working order.

Kind regards,

Ozymandias
[LG V20 Guides, News, & Discussion] DesertEagleSlim:
Downloaded and tried to view the zip and it gives me an error says "invalid entry size" or something. Need to revert to stock to turn this phone in (the speakers are broken)
[LG V20 Guides, News, & Discussion] clsA:
Theirs other stock ROMs check my v20 repository
[LG V20 Guides, News, & Discussion] DesertEagleSlim:
The one you have on AFH listed as h910-10r.zip can I flash that and have this back to stock? It's an H910 rooted dirty Santa running the us996 bootloader. Or do I need to do other stuff to fix it back to stock? Any help appreciated sir.
[LG V20 Guides, News, & Discussion] clsA:
h910_10q_full_stock.zip

or

H910_20g_Oreo_full_stock_Tested.zip

will both replace the bootloader and return your phone to stock
[LG V20 Guides, News, & Discussion] DesertEagleSlim:
Thank you very much. Really appreciate it.
[LG V20 Guides, News, & Discussion] trouble.:
Hey can u guide me how to downgrade from h915 oreo to nougat and then root it? I can't downgrade with lgup
[LG V20 Guides, News, & Discussion] clsA:
I posted instructions here for someone else > https://xdaforums.com/showthread.php?p=80154416#post80154416

post#15
[LG V20 Guides, News, & Discussion] DesertEagleSlim:
Downloaded both but when I try and open the zip (to check contents) it says unknown size error or something. Didn't want to wipe phone and have the zip be corrupt or fail. Any idea why? Could it just be my file browser ES. Never had that issue before. Just curious
[LG V20 Guides, News, & Discussion] clsA:
TWRP will tell you if the file is corrupt

Take a backup first if the rom fails restore the backup

If your trying to view it on your phone you probably don't have enough ram

the system.img alone is 5.8 gigs
[LG V20 Guides, News, & Discussion] DesertEagleSlim:
OK thanks. I have both return to stock zips saved to my memory card. Just in case. And a twrp backup. I just need to flash back to stock Monday morn to turn phone into AT&T to get the note 10+. I'm going to miss this phone, but as of right not it has no speaker/sound and vibrate doesn't work so I'm missing txts and calls all the time. Tried changing the speaker, still same crackly no audio issue. So I must get rid of phone. ? I've much appreciated ALL the work devs put into keeping this phone alive. Time to move on and pray someone finds root for the 10+ (not holding breath)
[LG V20 Guides, News, & Discussion] alerton:
HI, i only got this v20 H910 a couple of weeks ago to replace my ancient nexus 6 that has had lineage16 running for ages very well but sadly its just about kaput now. im from UK so not using at&t but the phone works fine here with my UK sim. i couldnt get hotspot to work which is important to me so after a lot of trial and error (thought id bricked it at 1 point) got it rooted and installed the lineage16 (unsupported) which whilst it does work the battery life is really bad and the camera does not work. i did do a dump from LGUP (patched) before i started but now LGUP does not recognise the phone, probably because its been rooted etc. im assuming that by flashing the H910_20g_Oreo_full_stock_Tested.zip i will get stock at&t oreo and still have the same issue with non working hotspot but with luck LGUP will recognise the phone again. question is after it is done would i then be able to use the kdz for Oreo 8.0 V20 US996 that doesnt have the at&t hotspot issue? ive read a lot and it seems the H910 and US996 share the same hardware? Thanks :confused:
[LG V20 Guides, News, & Discussion] alerton:
well curiosity and impatience got the better of me ..........

i flashed the H910_20g_Oreo_full_stock_Tested.zip which went OK apart from me messing it up by flashing from internal memory instead of sd card and it asking for a password when i tried to boot it but it did allow LGUP to recognize the phone again and that was the aim :D

installed the H91510e_00_VTR_CA_OP_1205.kdz with LGUP and that all worked fine, nice and clean with no at&t bloat. i was able to do pretty much everything including working hotspot and fm radio etc. used it for a couple of hours without any issue :D BUT it was raining so i had nothing better to do so i thought id push my luck even further and installed the US99620f_00_1120.kdz which works fine (took 2 reboots to get passed the failed encryption message but it was all fine) so now i have totally stock oreo on my H910 :cool: the only slight issues are the IR does not seem to work and there is no fm radio and i can cope with that.

i was a little concerned about the battery drain (i have hotsport on almost all the time and i was installing loads of apps and updated too) so i hunted around the 'hidden menu' and disabled gsm as i have good 3g / lte coverage around here anyway so that should reduce the drain a little. currently its charging slowly but happily using a wireless Qi receiver; only thing is when it first goes on charge i get a 'charging slowly' warning pop up that i cant seem to disable (any ideas how to do that would be great). i cant find any newer versions so im leaving it as it is for now.

a big thank you to everyone around XDA for doing all the clever stuff that allows dummies like me to fill a rainy sunday and end up with an up to date (ish) V20 :good:
[LG V20 Guides, News, & Discussion] hustle02:
I am trying to revert my H910 back to stock after getting constant modem crash kernel panics when trying to install LineageOS 17.1 on it. I successfully got back to v10q but I have no service when I put my sim card in the phone and boot it up. The phone seems to be in a loop and just goes through searching for a signal, the little no signal "x", and back to searching. Can anyone help me with this issue? I do have a backup from LGUP when I unlocked the bootloader initially, is there a way to go back to that backup? Or is there something else I can do to fix this problem?
[LG V20 Guides, News, & Discussion] clsA:
does your phone still have an IMEI ?

If yes you can flash your modem backups with fastboot

fastboot flash modemst1 modemst1
fastboot flash modemst2 modemst2
fastboot flash fsg fsg
[LG V20 Guides, News, & Discussion] hustle02:
How should I go about getting back into fastboot to flash these? Will I have to go back and root it again?
[LG V20 Guides, News, & Discussion] hustle02:
So I went and unlocked my bootloader again and am currently on v10r with an older version of twrp to get past the secure startup screen that was causing issues and I have flashed those partitions in fastboot but I still have the exact same issues when I insert my sim card. Any ideas on what to try next? Oh also it still shows that I have an IMEI when I look in settings.
[LG V20 Guides, News, & Discussion] clsA:
couple of things does the sim card actually work in another phone ? They do go bad

2nd thing is theirs only 4 files related to the modem and signal

modem , modemst1, modemst2 and fsg if you have restored these from your backup and you still have no service

check the apn, delete it and put it back manually. reboot

check again.

aside from that the only thing I can see is you flashed lineageOS, go back to it and see if it works
[LG V20 Guides, News, & Discussion] Jc_master:
I just wanted to pass by and thank you for this and confirm that its fully working, it even locks the bootloader again so no more anoying warning message.
[LG V20 Guides, News, & Discussion] skeevs:
Hi guys,

It's been a while since I last used my V20(H910) since moving onto the V30. Last time I left the V20, it was after restoring my H910 back to stock Nougat. Network signal is not detected as it needs specific modem files on the device previously to be flashed. Before I rooted the device, I made the full dump of the partitions with patched LG UP. Am I able to just flash my modem(ie. modem_COMX modemst1_COMX modemst2_COMX related partitions using the patched LG UP or should I just be using fastboot flash ?

Edit : just realised hours later that stock h910 does not come with fastboot. So is it possible to flash specific partitions with LG UP?
[LG V30 Questions & Answers] atljatl:
Many Android blogs have reported that the V30 will have 600mhz compatibility, but I've seen no spec sheet or any other source that has hard citations.

Quallcomm says:

http://bgr.com/2017/08/28/galaxy-note-8-t-mobile-600mhz-support-vs-lg-v30/

The closest I've seen to confirmation of this is : https://twitter.com/JohnLegere/status/903262516977000450

Everything else is a headline with no source that says

LG V30 is T-Mobile's First 600MHz LTE Band 71 Smartphone

or

The LG V30 is the first phone to run on T-Mobile's new 600Mhz network
[LG V30 Questions & Answers] ChazzMatt:
Oh, come on. T-Mobile confirmed it the very day the LG V30 was announced by LG. Official T-Mobile press release on T-mobile website, from August 31 (same day LG announced the LG V30):

The newly-unveiled LG V30, the world’s first 600 MHz LTE-capable smartphone, will be available at T-Mobile this fall.

https://newsroom.t-mobile.com/news-and-blogs/tmobile-600mhz.htm

It's well known and everybody has been using this T-mobile statement as reference. T-mobile released that official statement on their website the same day LG announced the LG V30 (August 31). Very easy to find.

Even the tweet you referenced FROM THE PRESIDENT OF THE COMPANY says it.

Just to make clear, he also tweeted again -- referencing the official statement on the T-mobile website:

So, I really think you don't know how to click on hyperlinks or check sources at the bottom of articles? For instance, go this this article below... That T-Mobile press release on the T-mobile website is not only hyperlinked IN the article, but also separately referenced at the BOTTOM of the article.

LG V30 is Indeed T-Mobile’s First 600MHz LTE-Capable Smartphone

http://www.droid-life.com/2017/08/31/lg-v30-tmobile-600mhz-smartphone-first/

____

By the way... your Qualcomm link (which states that no "existing phone" can handle 600 MHz LTE band) is not valid, because that statement (August 28) was BEFORE the LG V30 was officially announced (August 31).

So, yeah "no existing" phone (as of August 28) can handle T-Mobile band 71, because in "PR SPEAK" the LG V30 didn't exist yet on August 28 (even though reviewers already had it in their hands with signed non-disclosure contracts). The LG V30 only "exists" AFTER the LG official announcement (August 31). Qualcomm wasn't going to ruin LG's big announcement scheduled just 3 days later. And T-Mobile then quickly chimed in with their own announcement, the same day of the LG official announcement, AFTER LG's press conference.

If you ask Qualcomm now (today), their answer would be different. ;) Yes, of course an "existing" phone -- the LG V30 -- can handle T-mobile's LTE band 71.
[Android General] tdct12:
I'm sorry if this is the wrong place to post. I know it's not possible to get a transparent navigation bar as of now, but I just loathe the screen burn in on my pixel. Would it be possible to create an app that simply forces the semi-translucent navbar you get from immersive mode to stay present so you get the effect of having a transparent navigation bar? :cyclops: