yashsingh1/xdaforums huggingface dataset:
[LG V30 Guides, News, & Discussion] drapeto:
Hey Chazz,

Saw a glimpse of hope, but haven't been able to solve the issue of not receiving phone calls.

What I did:

downgraded to 10b kdz and let it load completely with full partition (not refurbished)

Updated one at a time from 20b partition DL

20c refurb

20d refurb

20e refurb

20f refurb

20g refurb

20h refurb loaded completely WTF. Bootloader remained unlocked so I just had to fastboot twrp.

Data wipe et al to get magisk and twrp.

Back to twrp and wiped 3x

Installed havoc 2.9 / nano 9.0 / magisk

Still can't get incoming calls.

It takes ~ 7 seconds for an outbound call to ring the first time and inbound calls go directly to VMail.

Again, going to 20h gives me access to calls without issue. But its stock... lol. I really enjoy Havoc.
[LG V30 Guides, News, & Discussion] gimpy1:
Hi, Chazz. I'm on the US99830b (ver 9, pie), originally vs996. Is the security update of August, 2019 still the latest? Is there a more current update available somewhere that you're aware of?

Thx.
[LG V30 Guides, News, & Discussion] ChazzMatt:
There's only been one US998 Pie KDZ released, but it's technically for U.S. Cellular. The Open Market USS98 Pie firmware was never released.

I'm still on rooted stock Oreo 20h myself.
[LG V30 Guides, News, & Discussion] ChazzMatt:
Sorry, can't help with custom ROM issues. Maybe ask in that custom ROM thread, where actual users might share same experiences?
[LG V30 Guides, News, & Discussion] gimpy1:
So, is your last security update for 20h, April of 2019? Or is there any later update for your 20h later than my August update of my 30b?

I'm just getting a little concerned about my security of late.

Thx
[LG V30 Guides, News, & Discussion] ChazzMatt:
No, there's not much later security patch for North American stock firmware (Canada does have a later Pie than US998 by a month, I think).
[LG V30 Guides, News, & Discussion] estemanito:
[MENTION=3250376]ChazzMatt[/MENTION] you forgot me again brother :(
[LG V30 Guides, News, & Discussion] ChazzMatt:
I don't know why your OEM button is grayed out. It should not have anything to do with the version of LGUP you have.

But the most recent Dev Patched LGUP is on page 1 of this thread. Uninstall any prior version (if you have one installed), make sure you install via the dev settings.bat and launch via desktop shortcut, not the folder icon.
[LG V30 Guides, News, & Discussion] estemanito:
i Re-installed LGup and LG drivers and it worked, so i was able to finnish the stage 4. in the METHOD #4 Flash US99830b_00_0902.kdz again using REFURBISH mode without problem. But OEM still locked in grey.

Should i try to install TRWP now or not...?
[LG V30 Guides, News, & Discussion] ChazzMatt:
Is your bootloader fastboot unlocked or not? If it's not unlocked in fastboot you cannot install TWRP yet. That's the whole reason to fastboot unlock your bootloader.
[LG V30 Guides, News, & Discussion] estemanito:
OEM still in grey locked (i cant switch the buton), and i have a message just below "bootloader is already unlocked"

i start cmd in admin mode :

adb devices
List of devices attached
LGUS998******** device

so he recogniced the device

adb reboot bootloader

https://dl.xda-cdn.com/5/0/0/6/9/3/....jpg?key=h9jAA66w3sKreglW3AoIiQ&ts=1588274848

fastboot oem unlock
< waiting for any device >

EDIT: i did a hard reset but nothing changed ... i really dont know what else i could do....
[LG V30 Guides, News, & Discussion] estemanito:
ok device was recogniced in Fastboot (only in Linux) i tried to flash TRWP but without success, looks like write acces is blocked. Some help would be appreciated guys, my phone is locked from a week already and i really need to recovery him .
[LG V30 Guides, News, & Discussion] ChazzMatt:
You need to follow the WTF instructions to unlock bootloader before you can install TWRP custom recovery.

You still have never said you have unlocked the Bootloader.
[LG V30 Guides, News, & Discussion] estemanito:
https://xdaforums.com/showpost.php?p=82442547&postcount=719

https://dl.xda-cdn.com/5/0/0/9/1/2/....jpg?key=scqI2yRh-m2wh12vzW-kNw&ts=1588337897

WTF Method:

Installing TWRP:

1. Switch back to developer mode, USB debugging. (OEM Unlock is now not selectable right now, greyed out. In a few days it will again be selectable.)

2. Switch USB to Photo again; default is charging.

3. As before, on your PC from the Android tools directory,

adb reboot bootloader

4. Fastboot flash recovery TWRP.img (Remember you re-named this file to just TWRP.img earlier.)

i followed the guide, i did it mani times and when i use "Fastboot flash recovery TWRP.img" it blocks.
[LG V30 Guides, News, & Discussion] ChazzMatt:
Moving discussion to WTF thread as I don't want to clutter this thread up with TWRP and bootloader unlock talk.

Post #2 and #3 of this thread clearly discuss Bootloader Unlock, TWRP Installation and Root. Any further discussion about that should be in the WTF instructions thread as that procedure has nothing to do with US998 V30B...
[LG V30 Guides, News, & Discussion] SOU55:
Hello I have a 99830b and after rooting and unlocked the bootloader I decided to go back to full stock, I have KDZ 99820a and locked the bootloader and everything is working in oreo can I kdz to pie directly on my Us998 I'm kinda scared to do it because I was having USB issues I. Download mode in pie not in oreo
[LG V30 Guides, News, & Discussion] An`Droid:
Yes. Use instructions in Post #2
[LG V30 Guides, News, & Discussion] SOU55:
Thank your for the prompt reply, if my phone came out of the box with pie 99830b and Im full stock in oreo 99820a do i have to KDZ nougat first? I am locked bootloader and LG recovery
[LG V30 Guides, News, & Discussion] An`Droid:
Of course, You can try flash directly 99820a ->99830b, but there is a huge chance to get bootloop on the LG logo. Nobody knows why it is so. Sometimes it goes smoothly, but more often it stuck on logo.
[LG V30 Guides, News, & Discussion] ChazzMatt:
And since some of the workarounds to successfully update to US998 Pie depend on having Unlocked Bootloader and TWRP, the safest bet is just to update to last Oreo 20h. It's the most stable.

I'm on rooted Oreo 20h. Rooted because I want the LG DTS Surround Sound 3D stereo and Magisk mods. Oreo US998 20h because there's nothing better about US998 stock Pie and a few things that are worse. ;)

US998 Stock Pie is not an improvement over last US998 stock Oreo. Whereas, last stock Oreo is a tremendous improvement over early Oreo. Lots of camera improvements, stability fixes and the addition of LG DTS Surround Sound stereo libs (framework), but you need root to enable that.
[LG V30 Guides, News, & Discussion] ChazzMatt:
Updated

post #4

to include Dual Speaker Mode + HIM Magisk mod.
[LG V30 Guides, News, & Discussion] ChazzMatt:
From PM. I prefer to answer in open thread.

All your questions are answered top of post #2, where you downloaded the KDZ in the first place. Please go read.

https://xdaforums.com/showpost.php?p=79971591&postcount=2

It tells you how you probably should update to Pie, and gives link to post #6 for FOUR other methods. Some require root, some don't.

_________

Top of post #1 - very first sentence -- has link to recovery steps. But I don't think you need that as you say you can go back to 20h with no problem.
[LG V30 Guides, News, & Discussion] maratop2:
Hello, I had a problem with my LG. I rebooted the smartphone and after that it does not turn on. The combination of the power and volume buttons do not work, the LCD does not work (when you try to turn on the logo it does not work), the computer does not find it. What can be done? fastboot does not work

(translated by Google)
[LG V30 Guides, News, & Discussion] ChazzMatt:
Have you tried placing on a Qi wirless charger? Qi wireless charger pad will automatically boot a phone if there is enough battery to boot. If you don't own one, go to a cell phone store and ask to try one there.

Have you tried the

combination of buttons for Master Reset

?
[LG V30 Guides, News, & Discussion] maratop2:
I always used a qi charger to charge, but here it does not help, the smartphone does not activate. I tried the combination too, but it didn’t work.
[LG V30 Guides, News, & Discussion] ChazzMatt:
Then something in hardware has failed. The only other time we see this is when flashing some new custom software (like incompatible Magisk module or some borked custom kernel) and the phone is bricked...

Of course it also won't turn on if battery is completely depleted but you already know that.

Just rebooting by itself shouldn't cause hardware failure, but still your phone is not booting so that's all it can be. Since you are posting in the US998 30b thread, this is the firmware you were using? You didn't install any custom kernel or recent new Magisk module or change any settings?
[LG V30 Guides, News, & Discussion] maratop2:
I don’t remember exactly what it was, but it was on Android 9, it seems like 20b, us998. I installed it for a long time, and used it without any changes. I didn’t install any custom kernels, I just installed the system and that's it
[LG V30 Guides, News, & Discussion] ChazzMatt:
OK, so you are using early US998 Oreo -- not this US998 Pie.

You can take it to cell phone repair shop, see what they say... May be something simple.

If it costs more than $140 to repair, just buy another here:

LG V30 US998- 128GB - Titan Black Unlocked Smartphone 9/10

https://www.ebay.com/itm/173665613177

___

LG V30/V30+

* 1440P OLED (537 ppi)

* Qi wireless charging

* 3.5mm headset jack

* Quad DAC

* DTS 3D stereo (with root to enable LG libs)

* FM Radio

* IP68 dust/water resistance

* rear camera OIS on normal lens - plus 120 degree wide angle lens

* superfast fingerprint sensor

* 64GB (V30) or 128GB (V30+) internal storage

* microSD port for additional storage

* bootloader unlock and root (all variants)

* no notch

US998

CDMA: 800 MHz CDMA

2G GSM: 850/900/1800/1900 MHz

3G UMTS (HSPA):850/900/1900/2100 MHz

4G LTE Bands: 1/2/3/4/5/7/12(17)/13/20/25/66

_____

Be sure to get a good case like this:

Spigen® LG V30 [Rugged Armor] Shockproof Case Slim TPU Cover

https://www.ebay.com/itm/Spigen-LG-V30-Rugged-Armor-Shockproof-Case-Slim-TPU-Cover/253142676754

These phones are like slippery fish with glass backs.

That case is actually slim but very good.
[LG V30 Guides, News, & Discussion] maratop2:
heh, i buyed him in this shop) eh,

I’ll ask how much the repair will cost in my city, and there I’ll already decide if I may have to buy a new one
[LG V30 Guides, News, & Discussion] 064852029:
Hello,

I tried method 1 but my V30+ was stuck in LG logo so I used method 4 and my phone could be upgraded to Android Pie.

However, my sim card cannot be registered with network even in phone status, it still shows my mobile phone number.

I went to Mobile network settings and changed the network mode to LTE/GSM/UMTS.

I did a manually network selection but it showed an error: error while searching for networks.

Please help me to get the mobile connectivity back :(

---------- Post added 31st July 2020 at 12:33 AM ---------- Previous post was 30th July 2020 at 11:59 PM ----------

One more information: I can still get IMEI by *#06# but the S/N in Settings->About phone->Hardware info is blank.

I did not use the option ChipErase in LGUP
[LG V30 Guides, News, & Discussion] 064852029:
Update:

My phone gets signal again after I flashed it to H933. Now I flashed it back to US998 and HSPA works fine but LTE or GSM.

It cannot register to LTE or GSM network even the signal can be found in manually network selection.
[LG V30 Guides, News, & Discussion] 064852029:
I went to the store and replaced my phone with another one which worked probably with LTE.

I repeated the steps in method 1 and my phone get no signal again.

I chose option ChipErase (already rewrote IMEI) and now it only works with HSPA.

Is there anyway to fix this problem?

Update: I found sometimes it could get LTE but in less than 1 second. I compared with another phone and found that the signal strength in HSPA is lower. When it can connect to LTE, the signal strength is only -125.
[LG V30 Guides, News, & Discussion] ChazzMatt:
What is your original variant model? You say you went to "the store" to get another. WHAT were they both? What store? What country do you live in? What LTE bands do you need?

Is the problem only with US998 Pie? Do you have normal LTE signal on Oreo US998?

If you have LTE signal on H933 Pie why not stay there? H933 has three more LTE bands than US998. Here's the LTE band differences between US998 and Canada H933. See attached screenshot.

Without knowing the information you haven't given yet, I'm just guessing you live in some country that needs one of the missing bands?

You don't live in Malaysia or Indonesia do you? One of those countries (don't remember which) won't allow LTE signals on phones not officially registered. Some dealers in those countries put in fake IMEI to match a phone which are allowed. If you wiped out IMEI you no longer have an approved phone -- if you live in that country.

___

Never use Chip Erase. I warn against that in all my Guides. If someone tells you to use it, they can help you recover. ;)
[LG V30 Guides, News, & Discussion] 064852029:
I live in Vietnam. My phone was running us99820b when I bought it at store. I think both h933 and us998 support LTE band in my country.

I tried to use partition dl or refurbish but my phone could not get any signal so I tried chiperase.

I recovered the IMEI by Qualcomm NV Tool (I wrote the IMEI and S/N to my notebook) and my phone can get signal but it is so weak.

On the rom when I got from the store, I can manually select GSM, HSPA, LTE but now it only works with HSPA at low signal.

I don't know why it can not register with GSM because I don't think GSM signal is weaker than HSPA.

I tried several roms like h933, us998, h930 on all android 7, 8, 9 but they were the same.
[LG V30 Guides, News, & Discussion] ChazzMatt:
Glad you were able to recover from Chip Erase.

In your earlier post, since you said your phone got LTE on H933 -- even when it couldn't on US998 -- maybe you should flash back to H933?
[LG V30 Guides, News, & Discussion] 064852029:
Sorry for my English. I will tell again my situation just to make clear:

I got the phone from the store and it was running us99820b. Everything works fine 2G, 3G, 4G.

Following the instruction, I used partition dl to downgrade to us99810d but it could not register to any network even the sim was recognized. I tried on several roms h993, us998, android 7, 8, 9.

I used chiperase and my phone could get signal even the IMEI was null.

I recovered IMEI by Qualcomm NV tool but I don't know how to recover S/N.

On h993, the signal bar always shows 4G even in about -> network, the network type is HSPA.

On us998, the signal bar shows 3G which is correct.

Both roms cannot work with 2G or 4G.

In comperision with other phone, I found the signal strength on my v30 is weaker.

Is there anyway to find the original region of my v30 based on IMEI or S/N?

My phone is a used one so I'm not sure whether it was on origin rom when I got it from the store.
[LG V30 Guides, News, & Discussion] ChazzMatt:
There are websites like IMEI Pro which should be able to tell you the original model number for your phone.

https://www.imeipro.info/
[LG V30 Guides, News, & Discussion] 064852029:
Currently, it requires a paid account to check the info :(.

Do you have any other website?
[LG V30 Guides, News, & Discussion] ChazzMatt:
Swappa.com has an IMEI checker but not sure how much detail it gives.

https://swappa.com/esn
[LG V30 Guides, News, & Discussion] 064852029:
hmm the Swappa page shows the result: No products match this ESN/IMEI.

do you have any recommendation?

I don't think that a rom flashing can make signal weak :(
[LG V30 Guides, News, & Discussion] schwinn8:
I have used https://www.imei.info in the past, and it shows the original device info on my phone.

Flashing a ROM could affect signal strength, as this can change the radio flash as well.
[LG V30 Guides, News, & Discussion] 064852029:
Thank you for your answer but I cannot find the region info for my phone
[LG V30 Guides, News, & Discussion] schwinn8:
Maybe they changed their format, because I'm getting a very different screen from my browser history.

Bottom line, google and find am IMEI search tool that tells you want you are looking for...
[LG V30 Guides, News, & Discussion] An`Droid:
Go to "LG Warranty & Carrier Check" (green button at the middle list)

You will find the original phone Model correspond to your IMEI.

But, it can be a fake IMEI if smartphone was refurbished in China. :(
[LG V30 Guides, News, & Discussion] 064852029:
It does not show anything :(
[LG V30 Guides, News, & Discussion] An`Droid:
At least, on both of your screens it showing LG V35.

It is different model.
[LG V30 Guides, News, & Discussion] 064852029:
My phone is V30+ so I don't know if the page have any mistake with V30+ and V35 or it's a fake IMEI.
[LG V30 Guides, News, & Discussion] An`Droid:
imei.info - accurate trusted page. Never had problems with records.

So, there are 2 explanations:

1) You have fake IMEI as I said before

2) You have V35 (same body as V30 but another hardware)
[LG V30 Guides, News, & Discussion] 064852029:
I checked the hardware. It uses SD835 and has 4GB of RAM so I think it's a V30+.

I checked the IMEI of my previous V30+ and imei.info also shows it as a V35.

It's possible that the store sold me the refurbished phones with a fake IMEI.

So, how can I find which is the rom can bring back the signal strength to my phone?
[LG V30 Guides, News, & Discussion] An`Droid:
You can try another regions V300L (Korea), H930 (Europe)

Those versions have different radios and this can be a reason of your problem.

But never try H932 (american T-Mobile) - you will brick you phone!
[LG V30 Guides, News, & Discussion] ChazzMatt:
If he has any native North American variant, flashing H930 modem will not work. He won't have a signal at all. He will have to flash back to North American variant modem. This is why you can't truly Frankenstein any to or from any H930* variants. Their modems can't be changed and are not compatible with North American variants.

I don't know about flashing Korean variant.
[LG V30 Guides, News, & Discussion] An`Droid:
This is what possibly happening. Native European or Korean device was flashed with North American firmware. As the result - modem is not working now.

I would think that seller had re-flashed Korean to US998 to eliminate specific Korean applications and settings, using "partition dl" keeping original modem's partitions. That is why it was working from the beginning. But later was fully re-flashed by owner to NA version. The modem does not work anymore.
[LG V30 Guides, News, & Discussion] ChazzMatt:
That's a good theory and thank you for your suggestion. :good:

Whether that's the right answer, I don't know but it fits many of the clues.

The one thing that puzzles me however is he said he flashed to Canada H933 firmware and got LTE, but it seemed weak. (I forget whether it was his first or second phone.) I am not sure that is possible with Korean phones. But I admit I am not well versed on the Korean variants. In the WTF Intructions, after bootloader unlock, TWRP and root, I hand off the part about getting the signal back to another thread written by Korean variant owners.
[LG V30 Guides, News, & Discussion] 064852029:
Hi,

I tried some H930, H933, US998, V300L roms on all Android 7, 8, 9.

H933: weak signal, cannot connect to 2G or 4G network, but the icon on signal bar always show 4G even in about->network it shows HSPA.

US998: same as H933 but the icon on signal bar shows 3G.

H930: no signal.

V300L: no signal, the setup app crashes, phone keeps restart continuously.

I just know that in Japan, the phone is named as V35 instead of V30+ (even in other regions, V35 is another model).

Is there any Japan variants? Any chance for me to flash a Japan rom without bricking my phone?
[LG V30 Guides, News, & Discussion] An`Droid:
How did you know that there is "no signal" if setup app is crashes?

What flash option you use in LGUP?

Also try V300K
[LG V30 Guides, News, & Discussion] 064852029:
We have signal icon on status bar :p.

I'm downloading V300K20e. Shall try to flash it ASAP.
[LG V30 Guides, News, & Discussion] An`Droid:
Hmmm... :rolleyes:

You should try flashing without sim inserted!
[LG V30 Guides, News, & Discussion] ChazzMatt:
We don't have the Japanese Isai LGV35 (their internal model number) KDZ. In Japan, their carrier Isai names all their LG products sequentially. It was just unfortunate coincidence their 2017 V30+ was "LGV35" (Version 35) -- after the 2016 LG V20 which was the Isai model "LGV34" -- and then a few months later in 2018 LG released a new phone series called V35. :rolleyes:

There's a whole thread about it here:

https://xdaforums.com/lg-v30/help/japanese-v35-v30-t3840383

You wouldn't want that modem anyway, I don't think. Besides LTE, it also has Wi-Max.
[LG V30 Guides, News, & Discussion] 064852029:
I also tried to flash V300K firmware but it's no signal, sim card is recognized.

Don't know what to do now :(
[LG V30 Guides, News, & Discussion] TPMJB:
Hrm, this may also explain why when I switched to a European SIM card, I had to flash the 20b modem otherwise I had no cell service. Worked just fine in the US.
[LG V30 Guides, News, & Discussion] An`Droid:
I mentioned, try flashing without sim inserted!

Start from the beginning, US99810c in Refurbish mode.

Do not forget Master Reset!
[LG V30 Guides, News, & Discussion] 064852029:
I tried this method but the issue still remains.

The signal is weak, cannot connect to 4G even I can search it in manual network searching, 2G not found even in manual network searching.
[LG V30 Guides, News, & Discussion] tech_infinity:
Some people have claimed flashing Nougat kdz and then Oreo kdz allowed them to RESET and use AOSP Pie ROMs with enforcing.

I tried flashing Nougat kdz and then Oreo kdz with my H930DS but couldn't make AOSP Pie ROMs work on enforcing.

So you could try it out if you want to see for yourself.

Here's some other stuff you might want to read: https://xdaforums.com/lg-v30/how-to/detailed-guide-aosp-roms-issues-solution-t4002535