Develop Bugs

E980 Modem / Baseband Saga, Consolidated. (Paging MadMack/devs?)

I've spent a bunch of time trying to understand why the modem in a particular E980 doesn't work in Cyanogenmod 12. Others should benefit from my efforts.
Searching reveals several posts about the modem issue, but quite a few of the responses are either links or references that require significant background to understand.
The community consensus is that one must flash "madmack's modem" when using CM with the E980 & variants. Without it, many phones can't enter deep sleep and thus drain the battery. Others can't use the modem at all.
(Madmack's modem post: https://forum.xda-developers.com/showthread.php?t=2430456)
(Current source of CyanogenMod 12.1: http://www.cyanogenmodroms.com/2014/01/cyanogenmod-rom-lg-optimus-g-pro.html)
"Madmack's modem" is the image for the BM9615A-CEFWMAZM-3.0.113012. Some users had a driver for a CM9615A[...] variant instead. For those users, flashing the BM9615A driver allowed the phone to go into deep sleep. Hooray!
---
Unfortunately, other E980 owners have a completely different modem: the APQ8064/MDM 9x15M. In this case, flashing the BM9615A file doesn't help.
If your modem appeared as an APQ8064/MDM9x15M on stock, it appears as the BM9615A upon flashing CM12. Unfortunately, its still an APQ8064 on the inside. This makes it seem like CM 12.1 is hard-coded to the BM9615A modem. When CM tries to speak BM9615A-ese to an APQ8064, the result is "No Sim" (or rather intermittently detecting and dropping the SIM).
Flashing the BM9615A image on an APQ8064 doesn't help -- the modem can't understand itself. CM and the modem firmware may speak the same language, but the image that runs the modem isn't right for the hardware.
At least, thats what I think is happening. I would appreciate it if someone with experience could please let me know if my understanding is incorrect.
Until someone finds a way around this, those people whose modem is APQ8064/MDM9x15M on stock may want to hold off on trying the available roms. Most are based on CyanogenMod and thus can be expected to have the same problem.
I wrote this post both to consolidate information and to ask for help. Does anyone have a way of getting an E980 with a APQ8064/MDM9x15M to work with CM 12.1?
(Note: Tried Emmanuel's wild kernel. Didn't help.)

No custom ROM changes (or should change) change your modem firmware, so neither should you unless told to do for your variant.
That specific modem was for AT&T variant of G Pro and many people who upgraded to stock kitkat and then tried to flash anything else, required it. No other variant should ever use that modem - if the need arises, just reflash back to last available jellybean stock firmware.
If you have deep sleep issues on any other variant but E980, just revert your phone to stock jellybean and flash whatever you want. Never had any modem-related deep sleep issues with Jellybean base, while with kitkat base there were some issues in KK roms, but not later... that I remember. I've used E988, built ROMs and kernels for it so I should kind of know
No SIM issues were solved later in 2015? if I'm not wrong. It was just a change in LGE RIL subclass, required after cyanogenmod updated their telephony framework.

ShadySquirrel said:
No custom ROM changes (or should change) change your modem firmware, so neither should you unless told to do for your variant.
That specific modem was for AT&T variant of G Pro and many people who upgraded to stock kitkat and then tried to flash anything else, required it. No other variant should ever use that modem - if the need arises, just reflash back to last available jellybean stock firmware.
If you have deep sleep issues on any other variant but E980, just revert your phone to stock jellybean and flash whatever you want. Never had any modem-related deep sleep issues with Jellybean base, while with kitkat base there were some issues in KK roms, but not later... that I remember. I've used E988, built ROMs and kernels for it so I should kind of know
No SIM issues were solved later in 2015? if I'm not wrong. It was just a change in LGE RIL subclass, required after cyanogenmod updated their telephony framework.
Click to expand...
Click to collapse
Thanks for the reply.
I guess I'm not understanding things well. How would one change the LGE RIL subclass appropriately, assuming a move from stock JB to CM 12.1 without any modem flashing?

facepalm5 said:
Thanks for the reply.
I guess I'm not understanding things well. How would one change the LGE RIL subclass appropriately, assuming a move from stock JB to CM 12.1 without any modem flashing?
Click to expand...
Click to collapse
Which CM build are you trying to use?

ShadySquirrel said:
Which CM build are you trying to use?
Click to expand...
Click to collapse
This one: http://www.cyanogenmodroms.com/2014/01/cyanogenmod-rom-lg-optimus-g-pro.html

facepalm5 said:
This one: http://www.cyanogenmodroms.com/2014/01/cyanogenmod-rom-lg-optimus-g-pro.html
Click to expand...
Click to collapse
October of 2016? I'm pretty sure there were no 5.1.1 builds for e980 back then. Can you try SlimLP from my downloads? That's a build from February 2016.

ShadySquirrel said:
October of 2016? I'm pretty sure there were no 5.1.1 builds for e980 back then. Can you try SlimLP from my downloads? That's a build from February 2016.
Click to expand...
Click to collapse
Thanks. That does seem to make the SIM work, but with a couple of quirks.
Tapping "build number" repeatedly doesn't activate developer options. Has this been moved?
Also, the usual root method seems to be disallowed and SuperSU disappears after being installed.

facepalm5 said:
Thanks. That does seem to make the SIM work, but with a couple of quirks.
Tapping "build number" repeatedly doesn't activate developer options. Has this been moved?
Also, the usual root method seems to be disallowed and SuperSU disappears after being installed.
Click to expand...
Click to collapse
SuperSU should be available via Settings menu (if something hasn't changed with newer versions) and Developer mode is on by default if I remember correctly, if not, taping on build number 7 times should tell you 'you're a developer now' and enable it.

Intended a direct reply. See below.

ShadySquirrel said:
SuperSU should be available via Settings menu (if something hasn't changed with newer versions) and Developer mode is on by default if I remember correctly, if not, taping on build number 7 times should tell you 'you're a developer now' and enable it.
Click to expand...
Click to collapse
Thank you for your reply and the work that you have put into making this device usable.
Developer mode normally lives under Settings-> System. The Feb 6 2016 SlimLP build includes "Date & Time", Accessibility, Printing, Kernel Auditor, Check for Updates and About Phone.
Was developer mode moved somewhere else?
Naturally, I've tried tapping "build number" many times. I don't get the usual "almost a developer" and "you are now a developer" response sequence.

facepalm5 said:
Thank you for your reply and the work that you have put into making this device usable.
Developer mode normally lives under Settings-> System. The Feb 6 2016 SlimLP build includes "Date & Time", Accessibility, Printing, Kernel Auditor, Check for Updates and About Phone.
Was developer mode moved somewhere else?
Naturally, I've tried tapping "build number" many times. I don't get the usual "almost a developer" and "you are now a developer" response sequence.
Click to expand...
Click to collapse
It should be somewhere near the end of settings menu, nowhere else. I guess something got borked somehow, so you may want to reboot.
P.S. Use SlimLP build from 16.02.2016, it has some new things fixed, and refflash rebuilt kernel I've mentioned in SlimLP post.

ShadySquirrel said:
It should be somewhere near the end of settings menu, nowhere else. I guess something got borked somehow, so you may want to reboot.
P.S. Use SlimLP build from 16.02.2016, it has some new things fixed, and refflash rebuilt kernel I've mentioned in SlimLP post.
Click to expand...
Click to collapse
Thanks. I'll give it a try, but let me make sure that I understand which one. There are two mirrors on the EOL thread: basketbuild & androidfilehost.
The newest build on basketbuild is 02072016. Androidfilehost has a 021816, however there is a note in the EOL thread that 021916 shouls be deleted because it doesn't work. Is that the same as 021816 or is 021616 really the same as 021616?

Sorry, I totally forgot that my mirrors are a bit different.
You should use this one (md5sum, it's the last stable build. Don't let date scheming confuse you, I've used kind of weird build system because my machine isn't as powerful as it's needed and builds sometimes take up to two days... nightmare. Later just flash kernel mentioned in the op over after the flash.
EDIT: You may want to drop SuperSU now or use some older version (before acquisition) and freeze it from updating.

ShadySquirrel said:
Sorry, I totally forgot that my mirrors are a bit different.
You should use this one (md5sum, it's the last stable build. Don't let date scheming confuse you, I've used kind of weird build system because my machine isn't as powerful as it's needed and builds sometimes take up to two days... nightmare. Later just flash kernel mentioned in the op over after the flash.
EDIT: You may want to drop SuperSU now or use some older version (before acquisition) and freeze it from updating.
Click to expand...
Click to collapse
Thanks.
The core items seem to be OK. I noticed a few odd items within the build. Since its been on an advertising host, I'd like to confirm that the file which you uploaded hasn't been modified. Could you please share your sha256 sum (md5 has been retired for a while now) for Slim-e980-5.1.1.beta.0.15-UNOFFICIAL-20160218.zip from your own hard drive?

facepalm5 said:
Thanks.
The core items seem to be OK. I noticed a few odd items within the build. Since its been on an advertising host, I'd like to confirm that the file which you uploaded hasn't been modified. Could you please share your sha256 sum (md5 has been retired for a while now) for Slim-e980-5.1.1.beta.0.15-UNOFFICIAL-20160218.zip from your own hard drive?
Click to expand...
Click to collapse
Sorry, I had two hard drive failures in last year and a half so only copies I have are uploaded to AFH with their original MD5 sums (sum which site shows you is sum they are generating after upload; sum I've linked you is sum generated after file was created). You can compare these two if you need some reassurance, but files are uploaded by me and were used by me, too, so should be no issues if no server-side corruption happened.

ShadySquirrel said:
Sorry, I had two hard drive failures in last year and a half so only copies I have are uploaded to AFH with their original MD5 sums (sum which site shows you is sum they are generating after upload; sum I've linked you is sum generated after file was created). You can compare these two if you need some reassurance, but files are uploaded by me and were used by me, too, so should be no issues if no server-side corruption happened.
Click to expand...
Click to collapse
I can confirm the builds he has uploaded work for me, including the kernel fix for LMK which he posted this past year. ROM runs great

Nougat stock 7.0 for vs986 (UsU)

Port from stock 7 android from h815 but with remote guglohlam, left only the play market and no operator applications, recording conversations present.
Install
First of all, you must have installed UsU (unofficial unlock bootloader) and twrp recovery
put through TWRP, before installing clean:
/ data
/ cache
/ dalvik / art cache
If you put on top of runoff 6, you can not do the format, but there may be bugs
install only via twrp from this site: https://twrp.me/lg/lgg4.html
Dovnload
https://drive.google.com/file/d/1bfl4IK2Si0LXBsvwW4MI5HStrz-zPYc7/view?usp=sharing
XDA:DevDB Information
Nougat stock 7.0 for vs986 (UsU), ROM for the LG G4
Contributors
motogvasyag, (Moto_G 4PDA)
ROM OS Version: 7.x Nougat
ROM Kernel: Linux 3.10.x
Version Information
Status: Stable
Current Stable Version: 1.0
Created 2018-10-28
Last Updated 2018-10-28

Thanks for the effort. Google drive says that the file does not exist unfortunately.

edjocute said:
Thanks for the effort. Google drive says that the file does not exist unfortunately.
Click to expand...
Click to collapse
https://drive.google.com/file/d/1bfl4IK2Si0LXBsvwW4MI5HStrz-zPYc7/view?usp=sharing

thank you so much! i will try it tonight

Hello, i've tried it, but it doesn't matter how many times i downloaded the zip, TWRP always say me that the zip iz corrupt, any idea why? Thanks in advance
UPDATE:
Solved! i updated the TWRP to official (i was in n preview) but now i can't install magisk, i got the message: "boot image patched by unsupported programs"

Will this work on 811?

deltadiesel said:
Will this work on 811?
Click to expand...
Click to collapse
try, but should not.
I started doing a week ago at 811 but did not have time, I sold the phone.

My vs986 says it's an h815 with this rom. It would be perfect if it had voice and data services.

Both links on Google Drive inaccessible. Anyone have a copy?

LiquidStorm said:
Both links on Google Drive inaccessible. Anyone have a copy?
Click to expand...
Click to collapse
My guess is this would work about like mod to the ROM still available on the T-Mobile LG G4 forum section, if you want a project. It is " LG_G6-PORT_H811 .zip" by TechnoFreak which is android 7.0. Look at second thread down that ends with my comment (@tullyp) and find MEGA link to zip. I fooled around with this rom extensively. I tested many changes to the build-prop,. I changed some of the files back to original G6 files that you can find in the expand ZIP. I was able to get it to actually work with CDMA 1xRTT voice and CDMA 3G (EV-DO). Could get it to work on Verizon LTE, but then CDMA would not work. Could get it to "show" Verizon's HD calling activation page, but would not activate. One thing I remembered helping was to flash a patch I found somewhere in XDA called patch_cdma_to_gsm_global_phones_v427_by_mentor.zip and set to CDMA only.
@tullyp
EDIT: This was posted just to give an altenative to ROM described in thread since the author said it is not available anymore and it never has had cell service on a vs986 anyway. There is a Korean 500 ROM in other threads also that will boot on our vs986, but like this on it is for an H815 and can't get service. Do not try any of these ROMs listed above on a vs986 unless you reflash vs986 MM USU modem before booting or could brick phone.

tullyp said:
My guess is ...
Click to expand...
Click to collapse
Thanks, but this thread about official 7 firmware from 815 ported to 986 board, with working NFC, GPay and else. I need exactly this ROM.

[ZIP] H930 to H932 ROM converter

On request, to easier find this, im creating this thread
For all the H932 users out there, who also want to use ROMs that dont provide support for it, but only for the H930, heres a little zip for you, which will allow you to fully use H930 ROMs on your H932.
What this zip does:
Replaces the necessary firmware files (list here (H930 tree, because the H932s list is somehow empty... gotta fix that later)) which are the only (important) difference.
This wont change the device fingerprint from H930 to H932 (maybe in a later version, who knows)
This is also ONLY intented for AOSP ROMs (LOS, RR, whatever else we have), do NOT use this on Stock based ROMs
How to use it:
1) Flash H930 ROM on your H932
2) Flash this zip
3) boot the system
This is NOT for H930/US998/and so on users!
XDA:DevDB Information
H932 Firmware zip, Tool/Utility for the LG V30
Contributors
SGCMarkus
Version Information
Status: Stable
Created 2019-08-16
Last Updated 2019-08-16

Thanks! Just added to the Root Sticky post.
Suggestion: all the ROM devs should add prominent link to this thread to their OP (post #1) of their ROM threads. It would only increase their ROM usage, as T-mobile H932 users think they don't have many choices!

ChazzMatt said:
Thanks! Just added to the Root Sticky post.
Suggestion: all the ROM devs should add prominent link to this thread to their OP (post #1) of their ROM threads. It would only increase their ROM usage, as T-mobile H932 users think they don't have many choices!
Click to expand...
Click to collapse
Thanks a lot for the zip Markus ?
Guys please add the link to your ROM pages.
@kherio @BADA 187 @Mrxyzl @luffy1105
 @Blackmanta @Ab.Shaheen

Thx for your work!:good:

i'd like to try on stock... but kinda scary

immns said:
i'd like to try on stock... but kinda scary
Click to expand...
Click to collapse
It clearly says don't try on stock. So don't

immns said:
i'd like to try on stock... but kinda scary
Click to expand...
Click to collapse
This is ONLY for AOSP/Lineage custom ROMs, so T-Mobile H932 can boot them. Is the op not clear?
Post #2 screenshot is pretty clear.

Thanks for yours hard work. Have more choices to choose now..,?

Has anyone used on LiquidRemix rom for H930 and installed the rom on Tmo H932? Thanks.

thank you for thread (and link to thread) as it clears alot of confusion.
im still weary of using ROMs that werent "built" with h932 foundation for a number of reasons, but may give a few of the AOSP ROMs a shot if i cant find a decent debloated stock.

letthebeatrock said:
thank you for thread (and link to thread) as it clears alot of confusion.
im still weary of using ROMs that werent "built" with h932 foundation for a number of reasons, but may give a few of the AOSP ROMs a shot if i cant find a decent debloated stock.
Click to expand...
Click to collapse
XenonHD and this zip will work

HueyT said:
XenonHD and this zip will work
Click to expand...
Click to collapse
Tried it. And a bunch of pie based AOSP ROMs on rooted h932. They all boot fine but the modem bootstack doesn't match up. You won't get Wi-Fi on any pie ROM with h932 at the moment

I Tried to Update But Cant Possible.
Any One How to update LG V30 AS998?
Plz Tell Me I am New in Community

waseemrehmat said:
I Tried to Update But Cant Possible.
Any One How to update LG V30 AS998?
Plz Tell Me I am New in Community
Click to expand...
Click to collapse
Why are you posting in this thread? It's for T-mobile H932 and you say you have AS998.

ChazzMatt said:
Why are you posting in this thread? It's for T-mobile H932 and you say you have AS998.
Click to expand...
Click to collapse
So I Want Yo Know How. I Update My AS998

waseemrehmat said:
So I Want Yo Know How. I Update My AS998
Click to expand...
Click to collapse
Well, you need to ask in relevant threads. Or start a new thread in the Questions section. I see you finally posted in Frankenstein, which is helpful for what you need. I answered your question there.
In forums like this, people don't want irrelevant questions clogging their threads. This is a thread for T-Mobile H932 only and they couldn't care less about AS998.

letthebeatrock said:
Tried it. And a bunch of pie based AOSP ROMs on rooted h932. They all boot fine but the modem bootstack doesn't match up. You won't get Wi-Fi on any pie ROM with h932 at the moment
Click to expand...
Click to collapse
Can you clarify what you mean with this? I used RR and this converter and wifi worked fine. Similarly I've used for a long time the Lineage specific H932 build and I also get wifi. However in my region (Norway) I get an "x" on the LTE, HSPDA, 3G (any bands really) signal bars that comes and goes. Sometimes data works - especially when connected to a VPN, but I've had no issue in any other country, just this one and I wonder if the 2 are related. Or am I clutching at straws? I had to give up on my H932 and go back to my old iphone (bluurgh) because I don't know what the issue is and I can't be working with unreliable data.

letthebeatrock said:
Tried it. And a bunch of pie based AOSP ROMs on rooted h932. They all boot fine but the modem bootstack doesn't match up. You won't get Wi-Fi on any pie ROM with h932 at the moment
Click to expand...
Click to collapse
This literally does the same (relevant) changes to the ROM as when you would build H932 ROMs (the only difference are the few firmware files and the device fingerprint (unimportant))... so whatever issue you have, its not related to this

ddevey said:
Can you clarify what you mean with this? I used RR and this converter and wifi worked fine. Similarly I've used for a long time the Lineage specific H932 build and I also get wifi. However in my region (Norway) I get an "x" on the LTE, HSPDA, 3G (any bands really) signal bars that comes and goes. Sometimes data works - especially when connected to a VPN, but I've had no issue in any other country, just this one and I wonder if the 2 are related. Or am I clutching at straws? I had to give up on my H932 and go back to my old iphone (bluurgh) because I don't know what the issue is and I can't be working with unreliable data.
Click to expand...
Click to collapse
SGCMarkus said:
This literally does the same (relevant) changes to the ROM as when you would build H932 ROMs (the only difference are the few firmware files and the device fingerprint (unimportant))... so whatever issue you have, its not related to this
Click to expand...
Click to collapse
I honestly couldnt explain it any further than what I did
HOWEVER.
I decided to flash the LP ROM again, then the H930 to H932 converter, flash Magisk, and THEN the 20s Modem from a another topic and all my WiFi issues were cleared up.
so yes, in my particular case, I had to flash the ROM, and then the Modem in order to get Wi-Fi to work

Updated with the pie blobs from H932 30d. Zip is attached in the OP.
Does the same as for oreo, just with pie blobs and their location, so you shouldnt have any issues.

Is there more ROMs?

I recently purchased an tab S4 just an update from my previous Samsung tablet. I was wondering is there more ROMs for this tablet or ROMs currently in development? I noticed theres like 2 ROMs for this tablet. I have a note 8 and I'm currently running deluxerom on and it, and I really enjoy the tweaks and customization I'm able to do. I was looking for a same kind of feature for my tablet. Would greatly appreciate the answers I'm looking for. Thanks!

Mkami said:
I recently purchased an tab S4 just an update from my previous Samsung tablet. I was wondering is there more ROMs for this tablet or ROMs currently in development? I noticed theres like 2 ROMs for this tablet. I have a note 8 and I'm currently running deluxerom on and it, and I really enjoy the tweaks and customization I'm able to do. I was looking for a same kind of feature for my tablet. Would greatly appreciate the answers I'm looking for. Thanks!
Click to expand...
Click to collapse
Pretty much zero support. You can get a few 9.0 GSI ROMs to boot, but they all have issues. Mine has been sitting around since it was purchased while still using my old 2014 model.

veekay said:
Pretty much zero support. You can get a few 9.0 GSI ROMs to boot, but they all have issues. Mine has been sitting around since it was purchased while still using my old 2014 model.
Click to expand...
Click to collapse
Aww no way!? Really? I excitingly got this tablet cause of the features and thought perhaps there would be amazing ROMs for this particular tablet, but I guess not xD What are GSI ROMs? Also as a desperate attempt would other tablet ROMs work on this s4? Thanks mate!

Mkami said:
Aww no way!? Really? I excitingly got this tablet cause of the features and thought perhaps there would be amazing ROMs for this particular tablet, but I guess not xD What are GSI ROMs? Also as a desperate attempt would other tablet ROMs work on this s4? Thanks mate!
Click to expand...
Click to collapse
I had thought the same thing, but it seems the S3 is the last tablet to get real support.
https://forum.xda-developers.com/project-treble/trebleenabled-device-development
Some of the ones for 9 will work, but most features won't work too well, if at all.
You might be able to get another rom to work, I know I had no luck. Even trying ones with similar hardware, they all failed to even flash since the booting numbers are different.
Kind of have to be satisfied with Samsung, half baked custom roms or sell the thing.

Mkami said:
Aww no way!? Really? I excitingly got this tablet cause of the features and thought perhaps there would be amazing ROMs for this particular tablet, but I guess not xD What are GSI ROMs? Also as a desperate attempt would other tablet ROMs work on this s4? Thanks mate!
Click to expand...
Click to collapse
First,download "Treble Check" app from playstore & read for your device...
https://www.xda-developers.com/flash-generic-system-image-project-treble-device/
(Some GSIs roms are not compatible with some devices!)

veekay said:
I had thought the same thing, but it seems the S3 is the last tablet to get real support.
https://forum.xda-developers.com/project-treble/trebleenabled-device-development
Some of the ones for 9 will work, but most features won't work too well, if at all.
You might be able to get another rom to work, I know I had no luck. Even trying ones with similar hardware, they all failed to even flash since the booting numbers are different.
Kind of have to be satisfied with Samsung, half baked custom roms or sell the thing.
Click to expand...
Click to collapse
Hey Veekay I tried it and you're right unfortunately I came across the same issue as you brother
Now I'm stuck and I need help sorting my device out, was wondering if you knew this issue or could help?
When I got the stock firmware back and then when I flash TWRP with odin after going into TWRP I get 0mb as internal
so when I format and then go back into my load up the screen after SAMSUNG says "verification failed" and then reset
on the bottom. I tried other options as well. Without even wiping on TWRP the devices boots up into the setup wizard for the firmware fine
but after I wipe TWRP so I can get access to my internal drive my samsung boots into that verification reset screen. Got any clue as to how I can
resolve this issue? Thanks a bunch!

daitalos said:
First,download "Treble Check" app from playstore & read for your device...
https://www.xda-developers.com/flash-generic-system-image-project-treble-device/
(Some GSIs roms are not compatible with some devices!)
Click to expand...
Click to collapse
Hey! Thanks for your reply, will this work for PIE? I can't downgrade from PIE to OREO
and I don't know if GSI even works properly on my device

Mkami said:
Hey Veekay I tried it and you're right unfortunately I came across the same issue as you brother
Now I'm stuck and I need help sorting my device out, was wondering if you knew this issue or could help?
When I got the stock firmware back and then when I flash TWRP with odin after going into TWRP I get 0mb as internal
so when I format and then go back into my load up the screen after SAMSUNG says "verification failed" and then reset
on the bottom. I tried other options as well. Without even wiping on TWRP the devices boots up into the setup wizard for the firmware fine
but after I wipe TWRP so I can get access to my internal drive my samsung boots into that verification reset screen. Got any clue as to how I can
resolve this issue? Thanks a bunch!
Click to expand...
Click to collapse
Have you tried just reloading the latest stock firmware from scratch?

Yup, its unfortunate that there isn't much community support for this device. The Tab S4 is Project Treble supported and a few GSI ROMS do work. But as others have said they are unstable and not for use as a daily driver. We have a few discussion threads here talking about them.

veekay said:
Have you tried just reloading the latest stock firmware from scratch?
Click to expand...
Click to collapse
Would that work? If I did that I would still be able to download and install TWRP and have a root? Because of it being PIE

UndeadAnarchy said:
Yup, its unfortunate that there isn't much community support for this device. The Tab S4 is Project Treble supported and a few GSI ROMS do work. But as others have said they are unstable and not for use as a daily driver. We have a few discussion threads here talking about them.
Click to expand...
Click to collapse
I am going to do more research on these projects because I really wish there was more ROMs its quite an amazing tablet but the potential with the stock ROM lacks a lot

Mkami said:
Hey! Thanks for your reply, will this work for PIE? I can't downgrade from PIE to OREO
and I don't know if GSI even works properly on my device
Click to expand...
Click to collapse
Generic System Image (GSI) list :
https://github.com/phhusson/treble_experimentations/wiki/Generic-System-Image-(GSI)-list
you can try only "Android 9 Pie" official or unofficial gsi roms..
and remember ! Some GSIs roms maybe are not compatible with some devices! you can ask for your device on each thread
(for example look here): https://github.com/phhusson/treble_experimentations/issues/777
(usually this Gsi aosp 9 phh, generally works on most devices...BUT! ask first,and discuss it in the thread)
https://forum.xda-developers.com/pr...vice-development/aosp-9-0-phh-treble-t3831915

daitalos said:
Generic System Image (GSI) list :
https://github.com/phhusson/treble_experimentations/wiki/Generic-System-Image-(GSI)-list
you can try only "Android 9 Pie" official or unofficial gsi roms..
and remember ! Some GSIs roms maybe are not compatible with some devices! you can ask for your device on each thread
(for example look here): https://github.com/phhusson/treble_experimentations/issues/777
(usually this Gsi aosp 9 phh, generally works on most devices...BUT! ask first,and discuss it in the thread)
https://forum.xda-developers.com/pr...vice-development/aosp-9-0-phh-treble-t3831915
Click to expand...
Click to collapse
Can I do this without stock ROM and only TWRP? Because having the stock ROM is disabling my twrp to function without wiping and if I wipe than my stock ROM doesn't work
Thanks!

Mkami said:
Can I do this without stock ROM and only TWRP? Because having the stock ROM is disabling my twrp to function without wiping and if I wipe than my stock ROM doesn't work
Thanks!
Click to expand...
Click to collapse
Sorry,but I don't understand what do you mean " without stock rom and only twrp"...
you can install a Gsi rom, with two ways
Via TWRP, or Via Fastboot : https://www.xda-developers.com/flash-generic-system-image-project-treble-device/ (Tab S4 is a-only arm64)
for any other question, it is better to ask in the thread : https://forum.xda-developers.com/pr...vice-development/aosp-9-0-phh-treble-t3831915
(read carefully in OP & you can post,every single question there for your device,and you will get certainly help from the developer or from any other user..)

Mkami said:
Can I do this without stock ROM and only TWRP? Because having the stock ROM is disabling my twrp to function without wiping and if I wipe than my stock ROM doesn't work
Thanks!
Click to expand...
Click to collapse
You are going to have to just wipe it and start over from square one, unless you made a TWRP backup before starting all of this.
Download and flash the latest stock rom from recovery and then you can load twrp again.

I was looking at the possibility of using GSI's on some devices, and while they can offer new life to older devices, they're not entirely stable all the time unless you're willing to make your own changes. I know Lineage has made some excellent progress, but it's not fullproof yet and I wouldn't try it unless you're willing to not use your device as a daily use device.
I had an extra T-Mobile Revvlry which is basically a rebranded Moto g7 Play that I installed the Lineage GSI image and it works fairly well. However, this is more the exception to the rule and Moto devices, I feel, are far simpler in design vs certain Samsung devices. It also had a ton of trial and error involved for me to get it up and running properly.

Is it possible as the s4 becomes older, more people buy it and Samsung stops releasing official updates that someone will come along and create a ROM for it? Or is it more like Samsung locked the bootloaders and its close to impossible to write a ROM for it? Is it still possible to root the s4?

slipnslider said:
Is it possible as the s4 becomes older, more people buy it and Samsung stops releasing official updates that someone will come along and create a ROM for it? Or is it more like Samsung locked the bootloaders and its close to impossible to write a ROM for it? Is it still possible to root the s4?
Click to expand...
Click to collapse
Read very carefully without rush ! for " WETA Kernel + Encryption disabler " etc
especially, read the user comments carefully, and ask on the thread for any questions you have..
https://forum.xda-developers.com/galaxy-tab-s4/development/recovery-twrp-3-3-0-sm-t83x-t3928278 (Pie version)
https://forum.xda-developers.com/showpost.php?p=79483624&postcount=2
https://forum.xda-developers.com/galaxy-tab-s4/how-to/guide-sm-t83x-twrp-magisk-t4059227
( Newest Odin v3.14.4 is there : https://dl2018.sammobile.com/Odin3-v3.14.4.zip )

Thanks. I took a quick peak at the roms and kernels in the roms and kernels forum and they are pretty much all abandoned.
Someone did mention that the LOS 16.0 and ArrowOS GSI's work alright but are a bit buggy.

slipnslider said:
Thanks. I took a quick peak at the roms and kernels in the roms and kernels forum and they are pretty much all abandoned.
Someone did mention that the LOS 16.0 and ArrowOS GSI's work alright but are a bit buggy.
Click to expand...
Click to collapse
samsung,maybe at the end of july to give the upgrade to android 10....it is very likely to happen I think
yes,all Gsi Roms still have various problems unfortunately...
my opinion is: stay to stock rom for now....you can "uninstall" many applications if you want & without root, via "samsung package disabler"(paid) from playstore, or with this way:
https://beebom.com/how-remove-bloatware-android-without-root/
also,you can Install "NiceLock Downloader Companion App" ,to add some features on your device : https://forum.xda-developers.com/galaxy-note-9/themes/nicelock-module-download-links-module-t3923844
with this way I operate my device until now..

Check NT-Code: FFFFFF : 54 - but phone works OK......

Hi All,
I have a LG G710EMW, and I want to get android 10 on it. I live in UK so I flashed EU open rom onto this phone. Now everything appears to work fine, dual sim is working OK, I can call etc, but I get this error every time on startup.
I have read other threads - but they say they get no network, however my phone seems fine. Can I leave this rom or should I wait until brazil/hong hong/aus get android 10 and then flash? Also any idea when that will happen or it's already happened? Can you share the KDZ?

rash.m2k said:
Hi All,
I have a LG G710EMW, and I want to get android 10 on it. I live in UK so I flashed EU open rom onto this phone. Now everything appears to work fine, dual sim is working OK, I can call etc, but I get this error every time on startup.
I have read other threads - but they say they get no network, however my phone seems fine. Can I leave this rom or should I wait until brazil/hong hong/aus get android 10 and then flash? Also any idea when that will happen or it's already happened? Can you share the KDZ?
Click to expand...
Click to collapse
Same here... I've flashed ITA android 10 kdz and at the startup i've got the same popup
I've flash back android 9 and I no longer have this problem.
hoping that someone knows a little more...
(my phone isn't dual sim)

gius0161 said:
Same here... I've flashed ITA android 10 kdz and at the startup i've got the same popup
I've flash back android 9 and I no longer have this problem.
hoping that someone knows a little more...
(my phone isn't dual sim)
Click to expand...
Click to collapse
Most of us who cross flash get that error. Volte also does not work. Rest all works perfectly even after that error, so i just ignore it.

lefttobleed said:
Most of us who cross flash get that error. Volte also does not work. Rest all works perfectly even after that error, so i just ignore it.
Click to expand...
Click to collapse
is there any method to remove the warning even with root?

gius0161 said:
is there any method to remove the warning even with root?
Click to expand...
Click to collapse
If you google and see there are some methods for other phones. I did not bother to try, so don't know if it will work with our phones.

lefttobleed said:
Most of us who cross flash get that error. Volte also does not work. Rest all works perfectly even after that error, so i just ignore it.
Click to expand...
Click to collapse
Why does VOLTE not work? Any way to fix it?
gius0161 said:
is there any method to remove the warning even with root?
Click to expand...
Click to collapse
Yes possible to fix: https://forum.xda-developers.com/lg-g5/how-to/cust-error-solution-t3507311

rash.m2k said:
Why does VOLTE not work? Any way to fix it?
Yes possible to fix: https://forum.xda-developers.com/lg-g5/how-to/cust-error-solution-t3507311
Click to expand...
Click to collapse
I tried the volte solution in guides section and also voenabler magisk module. They did not work for me. I have EMW.
I have shifted to lineages, so am not looking at the development in those threads anymore. Voenabler in lineage os only changed my LTE to LTE+.
Voenabler did work for someone in that thread maybe you can go to that thread and discuss or try on your phone.

lefttobleed said:
I tried the volte solution in guides section and also voenabler magisk module. They did not work for me. I have EMW.
I have shifted to lineages, so am not looking at the development in those threads anymore. Voenabler in lineage os only changed my LTE to LTE+.
Voenabler did work for someone in that thread maybe you can go to that thread and discuss or try on your phone.
Click to expand...
Click to collapse
How is lineage os? Is it stable as a everyday OS? Any issues? Rather have stock android

rash.m2k said:
How is lineage os? Is it stable as a everyday OS? Any issues? Rather have stock android
Click to expand...
Click to collapse
I use the one by Josh.
For me it is stable. I don't use bluetooth, wireless charging, etc. so cannot comment on that.
I find this to be the best ROM out there for now. It has good battery and performance.
Basically you should be ready to experiment and see if you like it. If you want a fully stable phone, and no TIME to experiment, then I would advice you to stick to stock.

rash.m2k said:
Why does VOLTE not work? Any way to fix it?
Yes possible to fix: https://forum.xda-developers.com/lg-g5/how-to/cust-error-solution-t3507311
Click to expand...
Click to collapse
I had already read this guide, but I gave up as the code did not open any menus. Doing some research I found that the code varies by model (ends with 710#). However, unfortunately it does not work. I cannot modify the NT Code and with the 20b base firmware it returns NTCODE WRITE ERROR after edit it.