yashsingh1/xdaforums huggingface dataset:
[LG V30 Guides, News, & Discussion] MicroMod777:
I'm in the same boat. I just did full stock restore, but now I can't get Netflix come up to download because its still unlocked. If I Frankenstein back to US998, flash twrp, can I then re-lock bootloader and still enter TWRP to reflash the full stock ls998?

Anybody try this?
[LG V30 Guides, News, & Discussion] ChazzMatt:
Most people use Magisk Hide in Magisk Manager to hide root adverse apps.

You don't need to give up unlocked bootloader/root.

To fix Netflix issue, simply download app from APKMirror, then hide in Magisk Hide.

https://www.apkmirror.com/apk/netflix-inc/netflix/netflix-3-16-6-build-5382-release/

____

No, you can't re-lock bootloader and still have working TWRP.
[LG V30 Guides, News, & Discussion] MicroMod777:
Ok, did that Magisk. Thanks
[LG V30 Guides, News, & Discussion] strifej:
I have a LS998 flashed to US998 and everything was fine with my previous carrier, China Unicom. Switching to China Telecom, it defaults to CDMA. When I force it to LTE bands, I can't get data. With CDMA I get 3G.

I saw that Sprint has Band 41 which China Telecom uses.

Can I flash only the sprint modem while keeping the rest US998? On the first post, it seems like you're flashing a full rom.

If yes, do I have to flash through KDZ or there's a modem only zip for Sprint?

Thx
[LG V30 Guides, News, & Discussion] ScottieRotten:
There is a modem file around. If memmory serves correctly it is linked to the Frankenstein us998 - sprint V30 thread.
[LG V30 Guides, News, & Discussion] gilby2704:
Question does this apply to any variant custom ROM example H930,H934 or does it have to be the ones that support US998/LS998?
[LG V30 Guides, News, & Discussion] ChazzMatt:
From PM:

V40? Or V30? I don't have anything to do with V40.

Sprint does not release LG KDZ. Nor does AT&T.

However for LS998 V30 [MENTION=2732656]JWnSC[/MENTION] made TWRP-flashable zip which you can flash to return to stock for Sprint warranty exchange. It should work for your purpose. SEE POST BELOW.
[LG V30 Guides, News, & Discussion] MasterTec:
Will this method unlock CDMA capability on a native (non-frankensteined) US998U?
[LG V30 Guides, News, & Discussion] ChazzMatt:
ALL US998 already have CDMA.

What you will gain by flashing Sprint firmware are Sprint LTE bands not found in US998. You only need those if you're a Sprint customer.
[LG V30 Guides, News, & Discussion] ChazzMatt:
ALL US998 already have CDMA.

ALL US998 are carrier unlocked.

People flash to US998 firmware from other firmware like H931 to carrier unlock and add bands like CDMA.

See screenshot.
[LG V30 Guides, News, & Discussion] Wildcat2083:
I managed to re-lock the bl once, if im not mistaken i had to downgrade all the way back to the us998 files for the frankenstein method and get to the point where youd normally unlock the bl, issue the oem lock command, let it erase everything and then if im remembering correctly sinse i use sprint, i used the sprint stock zip and was able to flash to it, i think i did that process first and then got into the bl to lock, its been awhile but the idea is at a certain point even rooted stock fw takes away fast boot and if you want to go back to stock you can but i do know you have to downgrade to the point you can relock the bl then just use stock zips and then take the ota like normal, the process wasent easy, you can technically remove root and leave the bl unlocked but things like google pay still knows better, i am sorry i dont have the exact details now, i know its possible i just forgot the exact steps aside from knowing you have to go far enough back to get fastboot again, relock and then take the otas to get current
[LG V30 Guides, News, & Discussion] fitwright:
Does 20b or 21a need to be flashed FIRST now that we have 30a?

Finally flashed and rooted my new used v30+ to US99820b. This is the 2nd phone I've done this to so far. I want to flash back to Sprint LS998. Does either 20b or 21a need to be FIRST

---------- Post added at 12:50 PM ---------- Previous post was at 12:48 PM ----------

Does either 20b or 21a need to be flashed FIRST before going to the flashable 30a from JohnFawkes? Or can I just go to 30a, skipping 20b or 21a?
[LG V30 Guides, News, & Discussion] TxanMoe:
I think you need clean flash
[LG V30 Guides, News, & Discussion] PrevWon:
Great, thanks for the reply!
[LG V30 Guides, News, & Discussion] travy:
I got LTE working using the x.ispsn but I can't play any games I noticed says network not detected. Not sure why MMS other stuff seems to work I'm on the illusion rom.
[LG V30 Guides, News, & Discussion] Lurien:
How do you switch back to us998? The system backup made before flashing the Sprint zip?? Is the us998 rom better? Thanks...
[LG V30 Guides, News, & Discussion] quantemplation:
I mean, not like it's a huge deal cause anybody else could've figured this out, but you did copy-pasta from my post in another thread. Could've at least given a reference.

I did want to add to this discussion though.

I've dealt with intermittent black screen of death issues after doing all this flashing (using the Frankenstein - WTF method). So far it's been so intermittent that I haven't chosen to do a re-flash, but I'm curious if anyone else has experienced this and what they've done about it.

This black screen behavior can be described as a sudden (and I mean incredibly sudden; doesn't matter if you were just chilling on the home screen or launching a resource intensive task) complete black screen and simultaneous loss of all phone responsiveness, including any media playing, Bluetooth connections, etc., as if it were powered off. Yet it's not powered off, because the only way to get out of this state is to hold volume down and power for about 8 seconds (possibly another way would be waiting for the battery to drain, though I would imagine that could take weeks in such a condition).

Sometimes I'll go for what seems a week without encountering the issue, and sometimes it'll happen three times in the same night, but more recently it's the former.
[LG V30 Guides, News, & Discussion] jamesd1085:
First time i have seen this issue on this device...saw it on the g2...was caused by a screen driver...on the g2 early on in production they changed the screen panel they were using and a user made a flashable fix to auto detect which driver was needed...but afaik the v30 madels all have the same hardware...but the way you describe it is a bit different as the black screen usually came after screen was locked or went to sleep...maybe try connecting to a computer with some type of screencast to see if phone is still responding and only the screen is failing to work...that was how we figured things out back then...that would point to maybe a bad panel or just a driver issue...
[LG V30 Guides, News, & Discussion] Lurien:
Do the Sprint dialer codes work after doing all this conversion and stuff?? Thanks
[LG V30 Guides, News, & Discussion] ChazzMatt:
Other people have mentioned this OEM bootloader unlock option mysteriously is no longer disabled after being greyed out initially. We don't know how long until the change takes (did it happen after another reboot? After one day? After three days?)

We also have no explanation why it occurs. Leave it unlocked.

---------- Post added at 10:49 PM ---------- Previous post was at 10:22 PM ----------

Are you running stock firmware or AOSP ROM?
[LG V30 Guides, News, & Discussion] quantemplation:
Stock firmware.

If nobody else is getting it then it might be some weird issue associated with restoring my data backup.

I don't remember exactly when I did it, but there's a chance it was the data partition of the US998 firmware, before using the LS998 stock ROM provided.

That's really the only clue I've got to go with, cause I've tried lots of other things to no avail.
[LG V30 Guides, News, & Discussion] eigerzoom:
has anyone tried using the commands

fastboot oem lock insertpasswordhere

fastboot oem unlock insertpasswordhere

i was thinking the use of a custom password would override the WTF glitch.

thanks for anyone who tests

using a password is the factory method to issue these commands, just usually its a super long string from an OEM (motorola) or a .bin file like LG uses.

i would recommend a simple password of many zeroes or many zeroes with a '1' at the end in case the glitch bumps the value up or down during testing.

it would be nice to be able to relock the bootloader, as this gives absolute control to the consumer, and keeps your phone intact preventing misuse or losing data/settings if its stolen allowing an attacker to circumvent protections.

I guess it doesn't matter since it would still be succeptable to reflashing using the same method as before.
[LG V30 Guides, News, & Discussion] Lurien:
Spoke too soon. I can't seem to get to recovery. Any thoughts? Im using the recommended app to get to recovery but get a weird message.. Never gets into recovery. Says no command and a droidbot with an exclamation...
[LG V30 Guides, News, & Discussion] Lurien:
Does lte work properly when swiitching back to us998 rom?? How can I switch back to that properly after setting up lte on the stock sprint firmware? Thanks
[LG V30 Guides, News, & Discussion] ChazzMatt:
You need to reflash TWRP. Then boot to TWRP immediately AND allow it to make modifications (be writable).

Your TWRP installation didn't stick. You are still on stock recovery.
[LG V30 Guides, News, & Discussion] Lurien:
Got it to work. Thanks.
[LG V30 Guides, News, & Discussion] JWnSC:
If you have the proper apn, LTE will work on US998 firmware. Not really much difference between the two. They both perform about the same after removing some bloatware.
[LG V30 Guides, News, & Discussion] Lurien:
Ok. Thanks. I was curious as to why you chose to go back to us998 firmware.. I thought there might have been something beneficial in doing so aside from virtually no bloatware..
[LG V30 Guides, News, & Discussion] jamesd1085:
I'm definitely no expert...but you might test without those enabled...maybe someone who is a bit better with logs can see the issue...do you use mirrorlink to coneect screen with other devices at all?
[LG V30 Guides, News, & Discussion] quantemplation:
I have not used it before. Only actually heard about it the other day. Although I'll definitely look into it if it happens even with those settings off.
[LG V30 Guides, News, & Discussion] jamesd1085:
I was just wondering because i saw mirrorling spammed in there a few times and wondered if maybe it had tried to connect to something and failed...sometimes failed connection will freak out a device and cause crashes...one of my old Galaxy phones used to crash when trying to connect to a junk wifi router i had and it really would just go berserk
[LG V30 Guides, News, & Discussion] quantemplation:
Oooh. That may be a good lead. I didn't really think anything of it but all or virtually all of the occurrences have been at home. I don't recall any at work.
[LG V30 Guides, News, & Discussion] Lurien:
When you say remove bloatware you mean freezing stuff with titanium?? Or actually uninstalling stuff? Thanks.
[LG V30 Guides, News, & Discussion] JWnSC:
If I don't use it, I uninstall it. Be careful what you remove, some apks depend on others to function. Always make a backup so you can restore later if needed. Can't post a list..I remove a lot. There are some guides in this forum and in the v20 forum. What works for me may not work for others.
[LG V30 Guides, News, & Discussion] phenomenalblaze:
Guys do I need to change the modem.bin to img so I can flash through twrp or do I leave it as is and flash through fastboot?
[LG V30 Guides, News, & Discussion] JWnSC:
These are flashable zips in TWRP no need to extract the zip.
[LG V30 Guides, News, & Discussion] phenomenalblaze:
I mean to get LTE. I don't have a flash able zip for the modem.
[LG V30 Guides, News, & Discussion] JWnSC:
The modem is included in the zip. If you have a hard time getting LTE, flash 20b, update prl and profile, then flash 21a.

Once you get LTE working, you can flash a custom rom of your choice..or stay stock rooted.

Edit: Sounds like you are referring to this older thread..https://xdaforums.com/lg-v30/how-to/making-modem-bin-flashables-twrp-t3794435 you can do it that way also but no longer needed. I created this thread to simplify everything and include all in one flashable zip from TWRP.

If you are on US998 you can check to see if the Sprint bands are active refer to this post https://xdaforums.com/lg-v30/help/us998-hidden-menu-lg-v30-v30-t3719219/post76872417 be sure to thank them if it helped
[LG V30 Guides, News, & Discussion] AtoSaizo:
Unable to activate on Sprint

Hello friends, I am in need of some assistance.

I just bought a LS998 V30+ from yywireless on ebay with the intent of converting it to the unlocked US998. I'm currently using Sprint, so the conversion is mostly a "just in case" measure if I change carriers later and to remove all the bloat. As far as I can tell, I've gone through the whole WTF bootloader unlock and root process correctly and everything seems fine, except I am unable to actually activate it on Sprint. I've checked my IMEI online and it's clean, but running it through Sprint tells me it can't be activated. It's my understanding that Sprint won't activate a US998 because of band issues, but I even rolled back to the LS998 software with the files provided in the first two posts of this thread just to be sure it wasn't a software conflict and it still won't activate. If it's a Sprint variant phone running Sprint's software with a clean IMEI, I am at a loss as to why it won't activate.

Is there something I might have done during the process to have caused this, or might this be something that was a problem with the phone from the start? I'd really appreciate the help!
[LG V30 Guides, News, & Discussion] eigerzoom:
You screwed yourself by not reading the directions, you are supposed to activate on sprint before modifying.

The reason you cannot activate is because yywireless sells pre-paid devices which you cannot add to your current line of service.

If you call sprint customer care they will tell you they cannot change a pre-paid device to post-paid.

Because you have now modified the phone yywireless are not going to accept your return.

It does help to read the directions after all....
[LG V30 Guides, News, & Discussion] ricohz:
I did the samething but I also did the conversion back to ls998 before I got it activeted

I did it on line don't tell them is rooted

I went to sprint chat and told them I wanted to switch a phone they had me take out the sim from my lg v 20 (Or i could go get one from local store)gave them my imei rebooted and that was all
[LG V30 Guides, News, & Discussion] ChazzMatt:
Go to post #1, and READ point #1.

You can recover from that mistake, but that's why.
[LG V30 Guides, News, & Discussion] AtoSaizo:
Ah, I had read that before, but clearly I misunderstood.

To recover, would I need to flash the warrany return zip in the second post, or is something else needed?
[LG V30 Guides, News, & Discussion] eigerzoom:
i just went through this with a yywireless v30+ purchase myself......

sprint will not activate a pre-paid ls998 device on an existing plan...

there are apparently different versions whitelisted on sprint....

you can say i'm crazy....but its true

(by pre-paid, they are apparently referring to pre-paid cellular plans)

or probably likely....yywireless is selling pre-converted us998 devices?
[LG V30 Guides, News, & Discussion] JWnSC:
The imei has to be in sprints database or they won't activate it. If it is indeed a Sprint phone with a clean imei, there should be no issues activating it while on the stock firmware. No need to flash the warranty zip, the stock firmware will work.

Do not tell them what you flashed... Just tell them it is a LS998 that you wish to activate. Once they activate on their end, you will need to factory reset (just in case), connect to WiFi, update prl and profile

Edit: not sure about the yywireless stuff
[LG V30 Guides, News, & Discussion] ricohz:
I got the sim from my v20 and connected(put it in)a v30

I bought and connected 2 of them (I bought them from yywireless)

Maybe you had a different experience 1I rooted before connected the other after but both are on my Sprint plan
[LG V30 Guides, News, & Discussion] eigerzoom:
are you on a pre-paid plan?

i dont know why i had such horrible luck, why would some ls998 imei's be considered pre-paid devices and some not?
[LG V30 Guides, News, & Discussion] ricohz:
Nope

I've been on Sprint forever 5 lines
[LG V30 Guides, News, & Discussion] phenomenalblaze:
I actually bought mine from yywireless and I'm using it and all roms are working well. Though they are correct in the fact that you screwed yourself. You have to activate the device with Sprint before you do anything at all to the device.
[LG V30 Guides, News, & Discussion] AtoSaizo:
RESOLVED: Unable to activate on Sprint

Hey all, got an update. I called Sprint earlier tonight and was actually able to activate the phone more or less fine. The first support person I talked to ran into some issue activating it and wasn't able to figure out how to do it. She transferred me to a different tech, and she was able to take care of it without a problem. I have no clue what the issue was or what she did to fix it, but it's now activated and has service. I've continued along with the rest of the process and now have a Sprint-friendly US998. Thanks for the help and patience for a dummy like me. I've had my eye on this phone for while now, so I'm really looking forward to enjoying it and seeing what XDA does with it!
[LG V30 Guides, News, & Discussion] eigerzoom:
yywireless is shipping me a new phone, i asked them to provide the imei before shipping, they did, and sprint said it was clear....hopefully we good this time

what sucks is my bestbuy refund expired on the moto e4+ having to ship the first ls998 unit back to yywireless, so i'm out another $200 with accessories

nobody gonna buy that phone from me lol...uhg
[LG V30 Guides, News, & Discussion] ricohz:
Do the factory reset (volume down and power button yes and yes)should get you back to twrp

If no twrp then you're gonna have to reflash twrp from wtf tread (hopefully you have a twrp backup so you can retore) if you don't you're gonna have to reflash the Sprint zip on post 1 and magisk and stuff

Note once on twrp you can flash the Sprint update zip once you get back up and running you should back up in twrp(with the Sprint stuff)it will save you some time in the future

Sample on screen shot I got a few backups of different roms
[LG V30 Guides, News, & Discussion] TxanMoe:
pls simple short version

because my english is very weak

now your devices bootloop

lgup unknow model error

but you can enter fastboot mode

---------------------------------------------

ok,now bootloader is unlocked?

if bootloader is unlocked

goto fastboot

"fastboot flash recovery TWRP.img" (needed TWRP.img is the same directory)

and

"fastboot boot TWRP.img"

when your devices is boot to TWRP

factory reset & format data

after reflash Sprint 21a (do not leave TWRP)

and install Magisk, Encryption disabler, Root checker disabler at the same time

---------------------------------------------------

i know, your already tried fastboot method

but

i think, "fastboot boot recovery" is not correct command
[LG V30 Guides, News, & Discussion] JonnyTrulove:
I tried both commands you suggested and they returned the following:

C:\Users\JonHo>fastboot flash recovery TWRP.img

error: cannot load 'TWRP.img': No such file or directory

C:\Users\JonHo>fastboot flash recovery TWRP.img

error: cannot load 'TWRP.img': No such file or directory

Is there any way for me to pull that TWRP.img file from somewhere and send the file to the device through fastboot or create a folder on the SD card with that in it and redirect it there?

And if I can get back into TWRP, can I use that to reflash just the boot file from the Sprint21a file and not have to do a do a full reset and reflash?
[LG V30 Guides, News, & Discussion] TxanMoe:
PLS screenshot your directory

your current directory is JonHo

i think JonHo is User Name Directory

so, your need TWRP.img move to C:\Users\JonHo

yes full reset & reflash

when take care don not leave twrp

if need to reboot (only reboot to recovery)
[LG V30 Guides, News, & Discussion] ricohz:
Basically you have to do what you did in the WTF tread you just have to start from the twrp install

Just after installing twrp then flash the Sprint update (do you still have twrp on the platform tools folder from when you rooted?

Just fallow the directions on the WTF tread

You probably are going to have to start with a fresh install at least I would

Start here still twrp but since your system is probably messed up fromwhat ever you flashed or restore you'd install Sprint update zip

Remember to root, and remove LG checker and the encyption disabler
[LG V30 Guides, News, & Discussion] JonnyTrulove:
Well first and foremost, Its great to see im not screwed and its fixable. .Thank you. Couple follow up questions please:

Am i right to assume I cant restore my a backup from when it was a US998 to it now that its a LS998 right?

If thats the case, since i need to do the reset to get back to twrp, at that point I am basically back at the same place I would be if I used LGUP to flash the Spirnt21a update from post 1? The only difference at that point is Flashing through LGUP or TWRP right?

Also, do you know if its possible for me to just flash the boot file from sprint21a through LGUP to avoid full reflash and having to do everything over again?

---------- Post added at 03:54 AM ---------- Previous post was at 03:48 AM ----------

That worked! I was using adb from the main command prompt and not the folder that had my TWRP.img in it. I am now in TWRP....

---------- Post added at 03:56 AM ---------- Previous post was at 03:54 AM ----------

Ok so i just got back into twrp. I guess from what you both have said that my only choice here is to start fresh since i dont have a new backup from after the flash to LS998. Kind of a bummer, but still way better than a bootloop and 400 bucks better than a bricked device, so i will take it as a win.
[LG V30 Guides, News, & Discussion] ricohz:
Also, do you know if its possible for me to just flash the boot file from sprint21a through LGUP to avoid full reflash and having to do everything over again?[/QUOTE]

Ok so if you go back to us999 you won't have the Sprint stuff anymore you can flash ls998 with out going back to us998 this is if you can get into twrp

If you somehow erased twrp you most likely messed up you're system for example if you flashed Sprint update zip and you don't install magisk you erase twrp
[LG V30 Guides, News, & Discussion] JonnyTrulove:
Before i do the reflash I was looking around in TWRP and i noticed if i go into TWRP > Wipe > Advanced Wipe > there is an option for " Repair or Change File System" . Any chance i can use that to repair the system / data / cache etc?

Or the "Fix Contents" option.

---------- Post added at 04:10 AM ---------- Previous post was at 04:05 AM ----------

Ok so if you go back to us999 you won't have the Sprint stuff anymore you can flash ls998 with out going back to us998 this is if you can get into twrp

If you somehow erased twrp you most likely messed up you're system for example if you flashed Sprint update zip and you don't install magisk you erase twrp[/QUOTE]

I am in TWRP now, but the only backups I have are from when it was a US998. Could i just restore the Recovery, Cache and Boot from that backup or would it screw up my phone since its two different variants?
[LG V30 Guides, News, & Discussion] ricohz:
I'm not sure.....

The only way I've recover from something like this was doing a dirty flash of what ever rom I was on ... So maybe if you did a dirty flash but don't forget to flash magisk and encryption disabler and the LG checker thing

It might work did you have to reflash twrp? Cause if you reflashed I think you have to erase Data