Unlocked LG G Pad X 8.0 V520 (AT&T) Nougat Update - LG G Pad X 8.0 Questions & Answers

Update: I'm returning it and went to T-Mobile and got a V521.
Recently with T-Mobile's free line promo I got myself a free line. I picked up an unlocked V520/G Pad X 8.0 (AT&T model). Popped the Tmo sim in and it works great. However, it won't show an OTA update for Nougat, LG Bridge just gives "cannot get software version" errors, and as far as I can tell there is no where to find a KDZ file for the AT&T variant. Confirmed AT&T blocks updates on unlocked devices without AT&T SIM cards.
When I had Nexus devices, I didn't have too many problems flashing variants of stock ROMs while using on T-Mo, anyone successfully flashed the V521 update on the V520 variant? Not really worried about unlocking the bootloader or getting root, just want to be on the latest software -- mine is on a security update from June 2016.
edit: Any ideas on where to get stock AT&T firmware?

meh3884 said:
Update: I'm returning it and went to T-Mobile and got a V521.
Recently with T-Mobile's free line promo I got myself a free line. I picked up an unlocked V520/G Pad X 8.0 (AT&T model). Popped the Tmo sim in and it works great. However, it won't show an OTA update for Nougat, LG Bridge just gives "cannot get software version" errors, and as far as I can tell there is no where to find a KDZ file for the AT&T variant. Confirmed AT&T blocks updates on unlocked devices without AT&T SIM cards.
When I had Nexus devices, I didn't have too many problems flashing variants of stock ROMs while using on T-Mo, anyone successfully flashed the V521 update on the V520 variant? Not really worried about unlocking the bootloader or getting root, just want to be on the latest software -- mine is on a security update from June 2016.
edit: Any ideas on where to get stock AT&T firmware?
Click to expand...
Click to collapse
I have the file "LGV520AT-00-V20f-ATT-US-DEC-21-2016-ARB00+0.kdz",is it helpful to you?
If you need,I can share it with you.

superneil said:
I have the file "LGV520AT-00-V20f-ATT-US-DEC-21-2016-ARB00+0.kdz",is it helpful to you?
If you need,I can share it with you.
Click to expand...
Click to collapse
may i ?

superneil said:
I have the file "LGV520AT-00-V20f-ATT-US-DEC-21-2016-ARB00+0.kdz",is it helpful to you?
If you need,I can share it with you.
Click to expand...
Click to collapse
would you pls feel free to send to me also?thanks

What's the magic to get this to update? I have a V520 new out of the box off eBay and I haven't tampered with it (haven't unlocked bootloader, rooted it, etc)... but it's on android 6.0.1 - how does one get this to update to android 7.0?

I'll take a link to that kdz file too, if you'd be so kind! Not sure if I can force the tablet to install that manually, but it's worth a try.

I just received this tablet (Unlocked) and having the same issue. It does not have Nougat OTA update, neither Update can be detected by LG Air Bridge Software. I'll really appreciate if someone can link me to the Nougat file.

Check updates using an AT&T SIM. A user in Slickdeals has reported success - sorry can't post the link - new user here.
Update: I myself tried using AT&T Go phone and it worked.

travelyogi said:
Check updates using an AT&T SIM. A user in Slickdeals has reported success - sorry can't post the link - new user here.
Update: I myself tried using AT&T Go phone and it worked.
Click to expand...
Click to collapse
I also had success yesterday. But even after inserting the sim, it wasn't showing. So I called AT&T tech support, provided the IEMI number and they pushed it instantly.

I also got the LG V520 off ebay. I read in an ATT support forum that it was necessary to have an ATT sim card in the tablet or it will not be able to connect to the update server. The same forum suggested to bring the tablet to an ATT store or the Samsung Experience in a Bestbuy.
I can verify that it is not enough to simply to connect to the ATT wifi in the store, you do actually need to insert an ATT sim. It took some convincing to get the person at the ATT store to pull a sim card from a demo phone to let me try. Here are some tips:
-- The tablet will only allow you to check for an update once every 24 hours. Make sure that you don't check for an update 24hours before going to the store, or once you're there, do a factory reset in order to do the update check.
-- Go to the store when they aren't too busy so they are more willing to help out.
-- Once the tablet detects that there is an update available, you can shut down the tablet and replace with your own sim card. You can then connect to any WIFI connection to finish the update.
Changes in the Nougat ROM:
-- When you create a second profile, it can now enable "install from unknown sources", but there is still no access to the external SD card. It means that the secondary profile can only use the internal memory.
-- ATT pulled the "WIFI Hotspot" feature out of the Nougat ROM.
-- Just like the Marshmallow ROM, phone features do not work. I don't know if this is a firmware lockdown or if it's a software thing.
The lack of hotspot really makes me wish for a custom rom on this tablet. Here's hope we get one soon on the V520

superneil said:
I have the file "LGV520AT-00-V20f-ATT-US-DEC-21-2016-ARB00+0.kdz",is it helpful to you?
If you need,I can share it with you.
Click to expand...
Click to collapse
Can I receive that one? Thanks.

Can I get this as well?

superneil said:
I have the file "LGV520AT-00-V20f-ATT-US-DEC-21-2016-ARB00+0.kdz",is it helpful to you?
If you need,I can share it with you.
Click to expand...
Click to collapse
Please kindly send me the link, thanks!

superneil said:
I have the file "LGV520AT-00-V20f-ATT-US-DEC-21-2016-ARB00+0.kdz",is it helpful to you?
If you need,I can share it with you.
Click to expand...
Click to collapse
can I get this file as well?

http://pan.baidu.com/share/link?shareid=3707290073&uk=3594350791

Can someone share the link? Thanks.

Link
superneil said:
I have the file "LGV520AT-00-V20f-ATT-US-DEC-21-2016-ARB00+0.kdz",is it helpful to you?
If you need,I can share it with you.
Click to expand...
Click to collapse
Hi, can you share the file please.
Thanks

Could any kind person with the file LGV520AT-00-V20f-ATT-US-DEC-21-2016-ARB00+0.kdz please upload it.
I've spent about ten hours looking for this file in the vain attempt to update the V520 to Nougat, before I wrap it and give to my daughter for Christmas.
Many thanks to anyone that can help me out with this.
Simon

I would just purchase an h2o SIM card. Since h2o is an att reseller, you will get an update within 24 hours.

Software update for the LG G Pad X 8.0 (V520)
I was able to take my LG G Pad X *.) to Nougat with September security patch as listed below and the below ATT link:
Just google "LG G Pad X 8.0 (V520) updates" and you will receive the link for the update.
Software update for the LG G Pad X 8.0 (V520)
Here is the current update: Android 7.0 Nougat
The details
Release date: October 12, 2017
Android version: 7.0
Security patch level (SPL): September 1, 2017
Baseband version: MPSS.TA.1.0.c3.3-00015-8952_GEN_PACK-1.104273.1.114971.1
Kernel version: 3.10.84
Build number: V52020l
File size: 87.4MB
The updates
What's new: Android security updates
What's changing: BlueBorne fix (on SPLs September 1 or later)

Related

LG Leon (H345) Marshmallow Update

I have heard on an article on tmonews that the T-Mobile LG Leon will receive the Marshmallow update. Did anyone get it yet? http://www.tmonews.com/2016/12/t-mobile-lg-g4-security-update-lg-leon-marshmallow/
Originalsboy11 said:
I have heard on an article on tmonews that the T-Mobile LG Leon will receive the Marshmallow update. Did anyone get it yet?
Click to expand...
Click to collapse
Yes it was supposedly released on December 5, 2016 for OTA push but so far I have been unable to get it I've tried using the LG PC Suit but it just say's I already have the latest version same thing phone route according to T-Mobile the version is 6.0.1 and the update version number is just H345K which seems short and when searching the LG servers I'm not able to even find a rom for the 345 that ends with K the latest version is J so I really don't know what is going on but hoping I will be able to get it soon have you had any luck?
Same here. Phone's update software and LG PC Suite both identify H34510J as current
arcanexvi said:
Same here. Phone's update software and LG PC Suite both identify H34510J as current
Click to expand...
Click to collapse
T-mobile lied I just got done installing this upgrade which it is not it is only and update to version 10k Android 5.1.1 I'm a little P.Oed with T-Mobile right now for wasting my time and hopes with this Android 6.0.1 upgrade BS. I switching to Sprint FU T-Mobile
T-Mobile LEON update to 6.0 is delayed. No time given by T-Mobile when it will be released. Latest security google update is "k" and is available now.
I

So no Nougat on the RS988?

I've been using the RS988 G5 on Verizon since last month (that BHPhoto had on sale for $399, due to my old Note 4 DE having issues). For the price, it is a good phone, but I'm not liking the fact that it appears LG will not be upgrading it to Nougat, leaving it on 6.0.1 with months old security patch.
At this point, I'm not sure if I should just keep it for now and wait and see how the new phones are this year (G6, S8, Note 8, V30), or return it while I still can to BHPhoto and pick up something else. I could go with something used on Swappa (such as the Verizon branded G5 or V20 that both have 7.0) for around the same $400 or slightly more.
I'm so frustrated as you are... i live in argentina and a friend of mine brought me from this variant instead of a H850/830 as i requested but is such a good phone, i can't really complain
It's like a forgotten variant... i wonder if LG itselft knows it exists
Recieved the update
demodemo001 said:
I'm so frustrated as you are... i live in argentina and a friend of mine brought me from this variant instead of a H850/830 as i requested but is such a good phone, i can't really complain
It's like a forgotten variant... i wonder if LG itselft knows it exists
Click to expand...
Click to collapse
I too was frustated....recieved the uodate notification today on my rs988..around 600mb update
ankitsxperiago said:
I too was frustated....recieved the uodate notification today on my rs988..around 600mb update
Click to expand...
Click to collapse
Is this notification actually for Nougat, or perhaps for just a more current security update? The size seems too small for the Nougat update is why I ask.
Update: I just downloaded and installed the 554.17MB update and it was the latest security update (2017-01-01) in s/w version RS98811d. Maybe Nougat will come in the next weeks/months.
I'm downloading the "d" firmware, but really slow even with my 175Mbps Comcast connection, so not sure where the LG Software Update Server is.
Too bad it still isn't Android Nougat, but at least it is the Jan 2017 security update. So there is still hope I guess.
Update:
Finished the download and install. Visually, can see no difference from the "c" version.
Sorry
Diablo_692 said:
Is this notification actually for Nougat, or perhaps for just a more current security update? The size seems too small for the Nougat update is why I ask.
Update: I just downloaded and installed the 554.17MB update and it was the latest security update (2017-01-01) in s/w version RS98811d. Maybe Nougat will come in the next weeks/months.
Click to expand...
Click to collapse
Sorry i was excited...bur after installing i came to know that it was a security update
It looks like there is a RS988 Nougat Source Code listed here:
http://opensource.lge.com/osSch/list?types=NAME&search=lgrs988
But at the start of May, I'm doubtful we'll ever get it.
I had thought about going with the unlocked G6, but not any more, as LG is pretty bad about updates on their Unlocked devices.
I have read somewhere that they told a consumer that the RS988 would be updated in May, seeing the source code is a good sign I guess
P00r said:
I have read somewhere that they told a consumer that the RS988 would be updated in May, seeing the source code is a good sign I guess
Click to expand...
Click to collapse
I downloaded the source code, and the date on the files are from Feb 2017. So I guess there is still hope.
LG Replies (So Far)
I decided to periodically email LG about the Nougat update. My first email received this reply:
<<LG>>
Good day! Thank you for getting in touch with LG Email Services and letting us know about your concern. It’s our pleasure to assist you with your inquiry!
As far as we know and according to the list of updates we found on the following page, there has been an update for the RS988 phone model to Nougat 7.0 that was released this past 24th of March.
Software Updates are generally pushed into devices by the carriers or service providers (e.g. US Cellular, Sprint, Verizon, T-Mobile, etc.) that phones are locked with over-the-air (OTA). Factory unlocked phones have no connections to these updates and receive updates through LG via OTA or a software update tool instead.
If you haven't received any notifications about recent software updates on your phone, please try to check for and download the latest update for your unlocked phone via the LG Bridge application. You may download and use this application on a computer from the following page.
Please follow the step-by-step instructions under the ‘PC Sync’ section of the page above.
<</LG>>
My 2nd email brought this response:
<<LG>>
According to the information that we got from our product specialists, unlocked phones should receive an update from LG Over-The-Air once available for the unit. LG OTA updates for unlocked phones have to pass through multiple Quality Checks for several carrier networks or service providers before their release so it takes a considerable amount of time in between releases compared to phones locked with a specific carrier.
Should you require further assistance or for any other concerns, please do not hesitate to email us back. We’re more than happy to help you the best we can.
Feel free to contact us also via Live Chat or Phone by dialing 1-800-793-8896.
<</LG>>
Sorry, new user so no external links allowed.
/phandroid.com/2017/05/03/unlocked-lg-g6-android-nougat-update-us/ came across this today. I'm looking at buying this phone (LG rs988) can anyone confirm they have the update?
https://www.reddit.com/r/Android/comments/68urq5/seems_like_the_unlocked_lg_g5_rs988_is_getting/
I have the unlocked rs988 and have not yet received the update yet. I checked on the phone and on lg bridge.
Checking every couple of hours will update here if the nougat update ever shows up. ?
There is an update on lg-firmware.com for the rs988 released on 4-27 anyone try it and see if its nougat
Yes Its Nougat
firenemesis7 said:
There is an update on lg-firmware.com for the rs988 released on 4-27 anyone try it and see if its nougat
Click to expand...
Click to collapse
Yes its Nougat with Android Security Patch Level of March 01, 2017.
When I updated using the LG Flash Tool, it had to reformat the partitions (user, system ...). Therefore I lost my old data.
I backed up my data before upgrading. Will try to restore using the LG backup tool and report back later.
Don't you need the rs988 dll file to flash. If so where did you find it
firenemesis7 said:
Don't you need the rs988 dll file to flash. If so where did you find it
Click to expand...
Click to collapse
I used the LG Update tool from the link below.
Selected the upgrade radio button, followed by the kdz file and let the installation go through.
Again please backup as your data might be lost after the upgrade. To be on the safe side please remove sd card too.
https://www.mylgphones.com/download-lg-up-software
This worked fine for me. I'm not the owner of any these files hence I cannot take responsibility if anything goes wrong. Please use it at your own risk
everything seems to be working had to factory reset like you said but just glad to finally have Nougat. Thanks
jai4200 said:
I used the LG Update tool from the link below.
Selected the upgrade radio button, followed by the kdz file and let the installation go through.
Again please backup as your data might be lost after the upgrade. To be on the safe side please remove sd card too.
https://www.mylgphones.com/download-lg-up-software
This worked fine for me. I'm not the owner of any these files hence I cannot take responsibility if anything goes wrong. Please use it at your own risk
Click to expand...
Click to collapse
firenemesis7 said:
everything seems to be working had to factory reset like you said but just glad to finally have Nougat. Thanks
Click to expand...
Click to collapse
I guess the April upload is the Nougat one.
https://lg-firmwares.com/lg-rs988-firmwares/
I've been checking my G5 RS988 every day, and still no OTA Nougat update on it. I'd rather go that route as it (should) keep system data & apps in place, instead of doing the update via the LG Software which wipes/formats user data & apps.
I am on verizon and I can confirm the RS98810h_01_0303.kdz from lg-firmwares.com works on my RS988. I performed a backup and update with the tools and drivers provided in AUTOPrimes post linked below. Once I updated the device, I simply loaded the backup tool and restored my device, sms and apps appeared right back to the state they were before. My only question is that the firmware is listed as BPT (brightpoint), will this still include the same bands listed under the unbranded USA rs988?
https://forum.xda-developers.com/lg-g5/how-to/info-autos-g5-thread-t3350648

Unlocked and now stuck on old software

Hello all.
SM-G965U, was AT&T but now unlocked for Fi. In the US.
Build: R16NW.G965USQS3BRJ6
Security Patch: Nov 1
What do I need to do to get back to the OTA schedule? I'm presuming its to flash onto an unlocked ROM but I can't work out exactly which thread I need to be following to make that happen.
That is the newest update until they release Pie. You can manually flash a beta version of Pie or sign up for the beta program.
Electroz said:
That is the newest update until they release Pie. You can manually flash a beta version of Pie or sign up for the beta program.
Click to expand...
Click to collapse
Hi Electroz,
I'm still showing 'no update available' even with unlocked US apparently getting the update. Is there anything else I have to do? :/
dogiedogie said:
Hi Electroz,
I'm still showing 'no update available' even with unlocked US apparently getting the update. Is there anything else I have to do? :/
Click to expand...
Click to collapse
Wait a few days, the rollout might not be instantaneous
It's unlocked but still run the same AT&T branded firmware. All AT&T phone requires an ATT sim card and in US to receive OTA. It looks like you are on Fi so you need to get an active ATT sim from a friend to receive update.
What is the alternative to flashing some sort of generic ROM instead? Specifically what ROM would I need?
you need firmware version SM-G965USQU3CSAB THATS THE PIE UPDATE . it rebrands based on sim card so you wil be branded tmobile on project fi . here the thread with the link u want https://downloadmirror.co/2CXl/G965USQU3CSAB_G965UOYN3CSAB_CCT.zip
Wirelessmodz said:
you need firmware version SM-G965USQU3CSAB THATS THE PIE UPDATE . it rebrands based on sim card so you wil be branded tmobile on project fi . here the thread with the link u want https://downloadmirror.co/2CXl/G965USQU3CSAB_G965UOYN3CSAB_CCT.zip
Click to expand...
Click to collapse
Thanks. I think I'm actually going to go with SM-G965U1 G965U1UEU3CSA8 because I don't believe you get any carrier features with Fi, even if it piggybacks on Tmobile anyway.

Question AT&T Base Firmware needed for A526U

Hello, looking for some help to see if anyone can help me find the firmware of my A526U specifically for AT&T? I have moved my phone over from TMobile where I purchased it from, and am looking to re-flash it to AT&T. Was working fine for a few months, now I'm no longer able to make or receive calls.
After inserting the new AT&T SIM card, the TMobile splash screen still shows up. The Service Provider software version reflects TMobile still as well and I'm concerned that for whatever reason the phone did not fully update after inserting the new SIM. I spent 2 hours on the phone with AT&T support after the store said they couldn't help me. Pulled the SIM card out, restarted phone, put it back in, reset network settings etc. I've searched sammobile and I cannot find the AT&T firmware, only TMobile, Sprint, and TMK. I would sincerely be greateful please if anyone could help me by pointing me in the right direction for the firmware for this model phone.
AT&T doesn't make their firmware available publicly - for any device. I have a source who can get me Samsung firmware for any USA device - even AT&T. But he charges me for each one
I appreciate the quick response! Is there any option I have here? Could I try flashing a "U1" firmware to his phone then? He's currently on A526USQS4CVA6. I actually found your other post as I was also working on my note 10 plus - https://forum.xda-developers.com/t/n975u-and-n975u1-firmware-links-here.3957648/. If I'm reading that correctly, I should be able to correct? If so, how can I tell if the version I'm downloading is "downgrading the bootloader"
aschaffer35 said:
I appreciate the quick response! Is there any option I have here? Could I try flashing a "U1" firmware to his phone then? He's currently on A526USQS4CVA6. I actually found your other post as I was also working on my note 10 plus - https://forum.xda-developers.com/t/n975u-and-n975u1-firmware-links-here.3957648/. If I'm reading that correctly, I should be able to correct? If so, how can I tell if the version I'm downloading is "downgrading the bootloader"
Click to expand...
Click to collapse
1. Yes, you can try flashing U1 if you want
2. You can't "downgrade the bootloader" - Odin won't let you.
3. In A526USQS4CVA6, "4" is the position of the bootloader level/revision/binary. Make sure that whatever U1 firmware you download also has a 4 in that spot and you'll be fine. (Or just get the firmware from Frija or one of the other similar firmware download tools, because those throw you whatever the newest version is automatically)
iBowToAndroid said:
1. Yes, you can try flashing U1 if you want
2. You can't "downgrade the bootloader" - Odin won't let you.
3. In A526USQS4CVA6, "4" is the position of the bootloader level/revision/binary. Make sure that whatever U1 firmware you download also has a 4 in that spot and you'll be fine. (Or just get the firmware from Frija or one of the other similar firmware download tools, because those throw you whatever the newest version is automatically)
Click to expand...
Click to collapse
Thank you very much sir! I shall give this a go this weekend! You guys rock!
My AT&T N10+ N975U is running on Pie. It transitioned seamlessly with no changes made on my end. It was already using 4G VoLTE though. Same sim card.
I would contact AT&T advanced tech support as there may be an easier way.
4G VoLTE needs to be enabled in hidden settings.
blackhawk said:
My AT&T N10+ N975U is running on Pie. It transitioned seamlessly with no changes made on my end. It was already using 4G VoLTE though. Same sim card.
I would contact AT&T advanced tech support as there may be an easier way.
4G VoLTE needs to be enabled in hidden settings.
Click to expand...
Click to collapse
Your AT&T phone? So it's originally an AT&T model that you're still using with them? That's not the same situation that the OP is in
iBowToAndroid said:
Your AT&T phone? So it's originally an AT&T model that you're still using with them? That's not the same situation that the OP is in
Click to expand...
Click to collapse
The U is the AT&T variant vs the U1 which is the unlocked variant, correct?
blackhawk said:
The U is the AT&T variant vs the U1 which is the unlocked variant, correct?
Click to expand...
Click to collapse
Yup. But OP has a T-Mobile model that they moved to AT&T. There's also no guarantee that a Note 10+ will work the exact same way as an A52. You're also running 3 year old firmware, while OP is fully updated.
So i don't see the correlation.
iBowToAndroid said:
Yup. But OP has a T-Mobile model that they moved to AT&T. There's also no guarantee that a Note 10+ will work the exact same way as an A52. You're also running 3 year old firmware, while OP is fully updated.
So i don't see the correlation.
Click to expand...
Click to collapse
The old firmware works fine on 4G VoLTE... that's likely not the issue. What is the issue is it wasn't running on 4G VoLTE so it's likely the settings and sim card need updating not the firmware.
Hi All, thought I would provide an update... After spending hours on the phone with AT&T support this week and being frustrated with the AT&T store, I decided to proceed forward with flashing the U1 version. What started this all was last week my son could no longer make or receive calls on his AT&T A52 phone (we ported it from TMobile September 2021). The store and AT&T advanced tech support said there were issues with people's BYOD devices, even though the A526U and A526U1 shows on the supported devices list. The store rep said he's been getting people in left and right that can't make or receive calls, and all they can do is upsell customers to an AT&T branded phone.
SO... my son's phone was on A526USQS4CVA6. Startup screen showed TMobile still, even with the AT&T SIM card in it. I proceed to flash the A526U1OYM4CVB2_ATT that I found from Sammobile. Was hoping someone had just the "U" version but I couldn't find this anywhere. When doing the flash, I used the Home_CSC file (I had to download a patched version of ODIN as it was stuck as setting up connection) and when it finished it would just keep going back to the download screen on the phone and I freaked out. I did some more research and decided to flash again using CSC instead of Home.CSC (I did a backup using smart switch on my PC luckily). This WORKED! I'm guessing because the software version he was on was different than what I was trying to flash too so maybe this is why I needed the CSC for a clean flash (there was no user data file that downloaded from SAMMOBILE).
Now, calls are working on my son's phone again! AND his service provider software version now reflects ATT vs TMB! Man this has been one heck of a journey lol. I've seen numerous forums on google of people having the same trouble with me, their BYOD devices not working. Seems a flash of U1 worked for me, so hopefully this helps others out there!

Calls not working through Simple Mobile / T-Mobile network

I'm at my wit's end on this. Calls stopped working the other day due to 3G disablement as far as I can tell. AT&T model unlocked and using with Simple Mobile on T-Mobile network. Calls would just say "Calling" for a long time and then eventually disconnect. I could switch to GSM and make calls again, but slow data. Simple told me to get a new SIM and when trying to activate, it shows ineligible IMEI due to no Volte it seems.
I'm trying to get that fixed, but running into various issues.
LM-G850UM
I tried to crossflash (https://forum.xda-developers.com/t/tutorial-crossflash-bypass-opid-mismatched-error.4345963/)
I flashed G850QM30c_00_NAO_US_OP_0224.kdz but it didn't ask me to change the model, so it still shows LM-G850UM software G850UM30c. IMEI is the same.
Since this didn't get calls back or Volte, I tried updating the MBN (https://forum.xda-developers.com/t/...ther-qualcomm-powered-lg-devices-too.4343655/)
Data shows 4G. Calls don't even try to connect.
I don't know what to do next and don't have much time to try to figure it out. I like the G8X, so I'm hoping there's a way to save it.
Any thoughts from the experts?
Brando81 said:
I'm at my wit's end on this. Calls stopped working the other day due to 3G disablement as far as I can tell. AT&T model unlocked and using with Simple Mobile on T-Mobile network. Calls would just say "Calling" for a long time and then eventually disconnect. I could switch to GSM and make calls again, but slow data. Simple told me to get a new SIM and when trying to activate, it shows ineligible IMEI due to no Volte it seems.
I'm trying to get that fixed, but running into various issues.
LM-G850UM
I tried to crossflash (https://forum.xda-developers.com/t/tutorial-crossflash-bypass-opid-mismatched-error.4345963/)
I flashed G850QM30c_00_NAO_US_OP_0224.kdz but it didn't ask me to change the model, so it still shows LM-G850UM software G850UM30c. IMEI is the same.
Since this didn't get calls back or Volte, I tried updating the MBN (https://forum.xda-developers.com/t/...ther-qualcomm-powered-lg-devices-too.4343655/)
Data shows 4G. Calls don't even try to connect.
I don't know what to do next and don't have much time to try to figure it out. I like the G8X, so I'm hoping there's a way to save it.
Any thoughts from the experts?
Click to expand...
Click to collapse
Make a back up,and cross flash it with T-Mobile firmware.Problem solved.
Thanks Surge!
I crossflashed to general firmware. Where's the best place for the TMobile firmware? Just off their website? Will that lock the phone again, or will I still be able to use the Simple Mobile Service?
Brando81 said:
Thanks Surge!
I crossflashed to general firmware. Where's the best place for the TMobile firmware? Just off their website? Will that lock the phone again, or will I still be able to use the Simple Mobile Service?
Click to expand...
Click to collapse
It shouldn't lock the device if it's already unlocked.You can also use G8 firmware as well.(same device)Look here,this should get you the firmware you need.
Models - LG-Firmwares.com
Free archive of LG firmwares. Comparison of features and reviews of all mobile devices. Quick download of updates for your device.
lg-firmwares.com
Thanks again, Surge.
That's where I got my KDZ before. I used the one here: https://lg-firmwares.com/lg-lmg850qm-firmwares/ and used the 3/24/22 version for Android 11. When I flashed it with LG UP, it didn't ask me to change models, which I'm not sure if that's why it didn't trigger it to start working again.
Brando81 said:
Thanks again, Surge.
That's where I got my KDZ before. I used the one here: https://lg-firmwares.com/lg-lmg850qm-firmwares/ and used the 3/24/22 version for Android 11. When I flashed it with LG UP, it didn't ask me to change models, which I'm not sure if that's why it didn't trigger it to start working again.
Click to expand...
Click to collapse
Most are using the international firmware for the G8 and G8x models.Which is what the qm firmware is.If you're carrier is T-Mobile or any T-Mobile MVNO,I would solely use T-Mobile firmware.My G8x is AT&T branded and factory unlocked,and I tried using Tmobile service about 2 months ago and was having issues sending text messages.I could place and receive calls and get text but couldn't send them period.
Yeah, so my G8X is AT&T unlocked. AT&T didn't activate VOLTE on this model, so when T-Mobile shut down their 3G network, Simple Mobile calls won't work and the current IMEI shows it's not eligible (because of the model.) At least that's my understanding so far.
So for the G8, is this the firmware I should crossflash? https://lg-firmwares.com/lg-lmg820tm-firmwares/ or I could try the QM which may or may not work. Is that correct? Basically going to the 820 firmwares instead of the 850?
Brando81 said:
Yeah, so my G8X is AT&T unlocked. AT&T didn't activate VOLTE on this model, so when T-Mobile shut down their 3G network, Simple Mobile calls won't work and the current IMEI shows it's not eligible (because of the model.) At least that's my understanding so far.
So for the G8, is this the firmware I should crossflash? https://lg-firmwares.com/lg-lmg820tm-firmwares/ or I could try the QM which may or may not work. Is that correct? Basically going to the 820 firmwares instead of the 850?
Click to expand...
Click to collapse
I would go with the T-Mobile firmware since you're on their network.It wouldn't make a difference with VoLTE enabled with an AT&T sim.Once you pull the sim,and swap it it defaults back and turns the IMS settings off until it receives the configuration from their servers.Yes,820 firmware.It at least has the higher android builds,and better security patches.Once you put T-Mobile firmware on the device it should all work regardless of IMEI.
Edit:Make a back-up.Don't forget to do that first!
OK Surge....you've been helpful and seem to know what you're doing. What did I mess up?
I followed the cross flash instructions. I flashed the 820QM firmware first, and System loaded but the touchscreen wouldn't respond. I could only use the hard phone buttons. Decided to go to what you recommended with 820TM and it wouldn't boot at all - black screen - but I could still get to QFIL and LGUP.
I reflashed 850QM and touchscreen works again and I'm back to where I started.
When I flashed 820s, It did ask me if I wanted to change model numbers this time and I said Yes. And it asked it said it was changing some partitions on the 820 loads.
I may have been working on this too late. I appreciate your help so far.
Brando81 said:
OK Surge....you've been helpful and seem to know what you're doing. What did I mess up?
I followed the cross flash instructions. I flashed the 820QM firmware first, and System loaded but the touchscreen wouldn't respond. I could only use the hard phone buttons. Decided to go to what you recommended with 820TM and it wouldn't boot at all - black screen - but I could still get to QFIL and LGUP.
I reflashed 850QM and touchscreen works again and I'm back to where I started.
When I flashed 820s, It did ask me if I wanted to change model numbers this time and I said Yes. And it asked it said it was changing some partitions on the 820 loads.
I may have been working on this too late. I appreciate your help so far.
Click to expand...
Click to collapse
I think someone else encountered this once before,and it was caused by certain manufacturering dates of the device.Some models can use 820 firmware,and some can only use 850.Looks as if yours is kind of stuck with 850 firmware only.I think the AT&T version I have I could go either way it worked with no problems.I still have my G8x but never really used it.I bought it because it came with the dual screen attachement,and $125 I took it.Here's my Sprint copy if you want to give it a try.It's a LUNS copy minus LUNS 5 for IMEI information etc.I was in the same boat as you on certain features not working with AT&T at one point myself and had to crossflash the Sprint version of the device.With that being said,try this one from LG Fans first.If that doesn't work,try my LUNS Sprint copy and let me know which ones works the best.
LG G850UM | LG G8X ThinQ | Version: G850UM30a_00_0901 | Firmware for Region: CAN from - Lg-firmwares.com
LG G850UM Download the latest version of firmware | OS Version: Android 11 R | Firmware version: G850UM30a_00_0901 | CAN - Fan club LG-firmwares
lg-firmwares.com
Sprint LG G8x Last Update - Google Drive
drive.google.com
So interesting news....I obviously didn't try making calls last night at 2AM, but apparently reflashing with the same exact 850QM software I used before seems to have fixed the issue. Maybe changing the model to 820 and then changing back to 850? Who knows? That's like the 3rd thing that happened with this process that I have no idea why it started working differently, but hey I'm happy and back up and rolling.
Thanks for all of your help, Surge! I was truly at wits end, and had already ordered a new phone, even though I'm happy with the G8X overall. Now I can return that and keep rolling with the G8X.
Thanks again, you were a huge help and its much appreciated!
Brando81 said:
So interesting news....I obviously didn't try making calls last night at 2AM, but apparently reflashing with the same exact 850QM software I used before seems to have fixed the issue. Maybe changing the model to 820 and then changing back to 850? Who knows? That's like the 3rd thing that happened with this process that I have no idea why it started working differently, but hey I'm happy and back up and rolling.
Thanks for all of your help, Surge! I was truly at wits end, and had already ordered a new phone, even though I'm happy with the G8X overall. Now I can return that and keep rolling with the G8X.
Thanks again, you were a huge help and its much appreciated!
Click to expand...
Click to collapse
Glad you got it working!I run in to a same similar issue with a Note 8 I have,and it being an international unlocked AT&T phone.No calls would work period,and swapped firmware over and over and finally started to give up and flashed the stock firmware back and it worked.It's something that hangs in Android with the changed IMS settings that are sent to the device.It's all odd at the moment with carriers,but nothing surprises me anymore..lol..
"G850QM30c_00_NAO_US_OP_0224.kdz" Is a BPT kdz and is not truly open even though it says, "NAO US OP".
I got the phone working by using "G850QM30b_00_NAO_US_OP_0902.kdz", the "real" open kdz. Everything worked fine after that.
BereiBlue said:
"G850QM30c_00_NAO_US_OP_0224.kdz" Is a BPT kdz and is not truly open even though it says, "NAO US OP".
I got the phone working by using "G850QM30b_00_NAO_US_OP_0902.kdz", the "real" open kdz. Everything worked fine after that.
Click to expand...
Click to collapse
Can someone please explain to me the different versions of the firmware
BPT and CCT and USA
are they really different
there is also the 40A now which is android 12?
G850QM40b_00_NAO_US_OP_0805.kdz
https://lg-firmwares.com/lg-lmg850qm-firmwares/
most of these firmwares are are 4GB in size, the newer KDZ are just 1GB
G850QM30c_00_NAO_US_OP_0224.kdz
My ATT G8X just got the update to G850QM40A which is android 12
how is android 12? do the firehose , root and bootloader unlock apply
doctorman said:
Can someone please explain to me the different versions of the firmware
BPT and CCT and USA
are they really different
there is also the 40A now which is android 12?
G850QM40b_00_NAO_US_OP_0805.kdz
https://lg-firmwares.com/lg-lmg850qm-firmwares/
most of these firmwares are are 4GB in size, the newer KDZ are just 1GB
G850QM30c_00_NAO_US_OP_0224.kdz
My ATT G8X just got the update to G850QM40A which is android 12
how is android 12? do the firehose , root and bootloader unlock apply
Click to expand...
Click to collapse
Yes,the firehose will always work regardless of the Android version.Also from what I have read,yes the same procedures work for A12 for root and unlocking the bootloader.As always,backup your firmware before rooting and attempting to unlock the bootloader just in case something goes wrong!
Surgemanxx said:
Yes,the firehose will always work regardless of the Android version.Also from what I have read,yes the same procedures work for A12 for root and unlocking the bootloader.As always,backup your firmware before rooting and attempting to unlock the bootloader just in case something goes wrong!
Click to expand...
Click to collapse
Do you think there is any point to crossflash
USA G850QM40b_00_NAO_US_OP_0805.kdz
on ATT G8X to be used on Tmobile network? I can do the VOLTE patch after rooting it . is it worth the headache?
doctorman said:
Do you think there is any point to crossflash
USA G850QM40b_00_NAO_US_OP_0805.kdz
on ATT G8X to be used on Tmobile network? I can do the VOLTE patch after rooting it . is it worth the headache?
Click to expand...
Click to collapse
QM versions are international unlocked versions of the firmware.My branded AT&T G8x had issues sending text messages with T-Mobile service I do remember.I crossflahed my variant with the QM version and it worked flawless after that.But,I do have a full backup copy of the AT&T firmware if I ever decide to put it back.
Surgemanxx said:
QM versions are international unlocked versions of the firmware.My branded AT&T G8x had issues sending text messages with T-Mobile service I do remember.I crossflahed my variant with the QM version and it worked flawless after that.But,I do have a full backup copy of the AT&T firmware if I ever decide to put it back.
Click to expand...
Click to collapse
May I ask how did you back it up?
also if I have androind 11 ATT can I crossflash to android 12? that should not be an issue right?
the partitioning is not changed in the update?

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