LG G8 Volte Fix.

[Mysticblaze347]

cant you just cross flash the v20, thats what i did when i had mine.

Locked bootloader

 

[Mysticblaze347]

Locked bootloader

I have temp root

 

[siulmagic]

I have temp root

yea you will need unlocked bootloader, unless the v20 does not have secure boot, and im almost sure it does.

 

[Mysticblaze347]

yea you will need unlocked bootloader, unless the v20 does not have secure boot, and im almost sure it does.

All in all yeah, but still wondering if files would work or if v20 specific is needed?

 

[siulmagic]

All in all yeah, but still wondering if files would work or if v20 specific is needed?

v20 specific, you probably need to modify your build.prop in system and your apns config. i really dont remember to well, it a long time ago when i had my v20.

 

[siulmagic]

updated op, removed flashable zips, it seems they were causing issues, copy the files manually with a root explorer to your op folder.

 

[blaze2051]

updated op, removed flashable zips, it seems they were causing issues, copy the files manually with a root explorer to your op folder.

would you happen to know or have link to twrp.img for lg g820um?

 

[siulmagic]

would you happen to know or have link to twrp.img for lg g820um?

This one should work, remember to make backups before flashing this.

 

[blaze2051]

thanks i did end up flashing that with franco kernel app

 

[IshuG]

Thanks siulmagic for making things easier for us. But would it work for any operator in the world? Im using an officially unlocked t-mobile variant of lg g8 thinq purchased in USA but im using it in India where neither Wi-Fi calling nor volte are enabled for me. Volte setting cant be even found in the settings. Wifi calling atleast is shown but is disabled for me. The volte provisioned setting from the *#*#4636#*#* menu was disabled for me.

Attaching the pics for reference.

Thanks again.

 

[mangojain]

Thanks siulmagic for making things easier for us. But would it work for any operator in the world? Im using an officially unlocked t-mobile variant of lg g8 thinq purchased in USA but im using it in India where neither Wi-Fi calling nor volte are enabled for me. Volte setting cant be even found in the settings. Wifi calling atleast is shown but is disabled for me. The volte provisioned setting from the *#*#4636#*#* menu was disabled for me.

Attaching the pics for reference.

Thanks again.

I would be interested too. After making some changes to cust.prop, telephony.xml and vo_config.xml I have VoLTE showing as activated, but in reality it is not working. And lg.ims keeps crashing on Airtel and Jio, but not on Vodafone.

 

[mangojain]

I would be interested too. After making some changes to cust.prop, telephony.xml and vo_config.xml I have VoLTE showing as activated, but in reality it is not working. And lg.ims keeps crashing on Airtel and Jio, but not on Vodafone.

After messing around some more, i have VoLTE working partially, i can receive calls but can't make calls, the VoLTE feature gets disabled as soon as i do that. Can anyone help on this please.

 

[armodons]

So to use this, you will need to be bootloader unlocked, magisk perma rooted, and twrp installed, DM Verity Disabled this is a must!!(its always good to make a nandroid before making any changes on your phone). What this will do is more or less provision your Lg G8 to your Desired Carrier, it will also let you change your apns, so you have volte working and also the data indicator will change to match the carrier. WIfi calling i have not been able to get working, i personally do not use it. .

*Copy the files manually, it seems flashing them directly is causing unforeseen issues*



Download

Sprint

Sprint-volte-fixv1

MediaFire is a simple to use free service that lets you put all your photos, documents, music, and video in a single place so you can access them anywhere and share them everywhere.

www.mediafire.com

T-Mobile

VolteFix-v1

MediaFire is a simple to use free service that lets you put all your photos, documents, music, and video in a single place so you can access them anywhere and share them everywhere.

www.mediafire.com

Credits:
j4nn for the amazing temp root that allows us to do this
vl48 for BL unlock this guy is so awesome
inherent for finding j4nn and getting temp root rolling
Mr. zhu for bringing us TWRP.

Thanks for pointing me in the right direction! I now have VoLTE and Wifi Calling working on my LMG820QM (on T-mobile).

I have the BPT variant of the LMG820QM, for which VoLTE and Wifi Calling does not work. After bootloader unlocking and rooting, I tried the above VolteFix-v1 but wanted Wifi Calling. Forcing the option to appear via a profile in Universal Enabler in the hidden menu* did not work and instead caused LG IMS to continuously crash.

*For those interested in the hidden menu, first create an empty folder named "enable_ue" in internal storage. Then go to the dialer and type *#546368#*820#. In Field Test > Universal Enabler you can "Create New Config" and manually enable VoLTE, ViLTE, VoWIFI, and ViWIFI. However, even though these options became enabled in *#*#4636#*#* they didn't seem to actually work.

Next, I tried to crossflash partitions from the US Open kdz but was unable to due to a size mismatch of the OP partition (among other problems).

Finally, since I had already extracted the OP partition from the US Open kdz (G820QM20f_00_NAO_US_OP_0402.kdz), I extracted files that looked relevant and copied them over using a root browser into /product/OP. After setting permissions and restarting, I now have working VoLTE and Wifi Calling!

The files are cust.prop [update: apparently not needed; my existing one worked just fine], all the files in config, and a few folders in priv-app [update: these are the apps for Wifi Calling!] not present in my phone's kdz (not sure which ones if any of these apks are actually needed but since it works I'm not going to experiment more). See attached for details.

Note: Since these files are from the US Open kdz, it will likely only work for US carriers. But the process can be repeated for other regions with the right kdz.

UPDATE: Replaced the attachment, had the wrong files in Config.

** Noticed that upon factory resetting the wrong default APNs are inserted. Had to factory reset on original files, have APNs setup correctly, then copy the attached files (did not copy over cust.prop this time and still worked).

 

[Dusty46]

Thanks for pointing me in the right direction! I now have VoLTE and Wifi Calling working on my LMG820QM (on T-mobile).

I have the BPT variant of the LMG820QM, for which VoLTE and Wifi Calling does not work. After bootloader unlocking and rooting, I tried the above VolteFix-v1 but wanted Wifi Calling. Forcing the option to appear via a profile in Universal Enabler in the hidden menu* did not work and instead caused LG IMS to continuously crash.

*For those interested in the hidden menu, first create an empty folder named "enable_ue" in internal storage. Then go to the dialer and type *#546368#*820#. In Field Test > Universal Enabler you can "Create New Config" and manually enable VoLTE, ViLTE, VoWIFI, and ViWIFI. However, even though these options became enabled in *#*#4636#*#* they didn't seem to actually work.

Next, I tried to crossflash partitions from the US Open kdz but was unable to due to a size mismatch of the OP partition (among other problems).

Finally, since I had already extracted the OP partition from the US Open kdz (G820QM20f_00_NAO_US_OP_0402.kdz), I extracted files that looked relevant and copied them over using a root browser into /product/OP. After setting permissions and restarting, I now have working VoLTE and Wifi Calling!

The files are cust.prop, all the files in config, and a few folders in priv-app not present in my phone's kdz (not sure which ones if any of these apks are actually needed but since it works I'm not going to experiment more). See attached for details.

Note: Since these files are from the US Open kdz, it will likely only work for US carriers. But the process can be repeated for other regions with the right kdz.

I have Unlocked LMG820QM8 which is Amazon Alexa variant. AMZ_US. I need VoLTE. Can you help me with steps that your took. I am intermediate with LG flashing. I did try to cross flash that didn't work.

 

[armodons]

I have Unlocked LMG820QM8 which is Amazon Alexa variant. AMZ_US. I need VoLTE. Can you help me with steps that your took. I am intermediate with LG flashing. I did try to cross flash that didn't work.

Which part are you stuck on? You need to be bootloader unlocked and rooted first. Then just backup your existing files and copy the ones I had attached and update the permissions. Hopefully that should work.

 

[Dusty46]

Which part are you stuck on? You need to be bootloader unlocked and rooted first. Then just backup your existing files and copy the ones I had attached and update the permissions. Hopefully that should work.

do i need twrp ?

 

[armodons]

do i need twrp ?

Yes. For me I've noticed that with just root but no TWRP the /product/OP/ changes are either blocked or the files replaced upon restart.

FYI I've updated the attachment in my earlier post.

 

[Dusty46]

Yes. For me I've noticed that with just root but no TWRP the /product/OP/ changes are either blocked or the files replaced upon restart.

FYI I've updated the attachment in my earlier post.

I cant get into fastboot mode via adb command why is that ? is there other way !

 

[armodons]

I cant get into fastboot mode via adb command why is that ? is there other way !

Why do you need fastboot? You can flash twrp within the magisk app: follow the instructions in the attached twrpG8.zip here: https://forum.xda-developers.com/t/lg-g8-twrp-and-backup-for-sprint.4247225/

There is no fastboot on the stock kernel; that's why the engineering file is needed for unlocking the bootloader because it contains fastboot. See this thread: https://forum.xda-developers.com/t/...nlock-and-magisk-root-using-firehose.4221793/

 

[Dusty46]

Why do you need fastboot? You can flash twrp within the magisk app: follow the instructions in the attached twrpG8.zip here: https://forum.xda-developers.com/t/lg-g8-twrp-and-backup-for-sprint.4247225/

There is no fastboot on the stock kernel; that's why the engineering file is needed for unlocking the bootloader because it contains fastboot. See this thread: https://forum.xda-developers.com/t/...nlock-and-magisk-root-using-firehose.4221793/

I don't know much about LG. In fact this is my first ever LG smartphone. I am not familiar with flashing or rooting LG phones. Above link you shared for bootloader unlocking, firehose EFL file is for Sprint. Will it work for me too? I have unlocked version LM-G820QM8 AMAZON Alexa variant.