[GUIDE] [NO ROOT REQUIRED] [EPIC UPDATE] How to add VoLTE support/CA Combos for other carriers to the G8 (and other Qualcomm powered LG devices too!)

[VinniStag]

Thank God there is still people here helping out. thank you.

I was wondering if anybody can give me a hand.
I have an LG v40 that is supposed to be an ATT model v405UA. when i got it it had android 8, and couldnt upgrade to anything unless i was on ATT network, so i flashed android 10 that was a stock back up i found on xda that is also an ATT rom. The device is supposed to be carrier unlocked but figured i should get att sim card anyway and get it overwith but even then i cannot get VOLTE provisioned at all and i dont know why.

I tried the universal enabler method with no luck. then i tried opening up the modem profiles on PDC as described here. I see an "att" and "row_att". Its seems like the phone always wants to be on the ROW one and i tried deactivating that one and trying to activate the plain ATT one but the phone goes back to ROW after a few seconds.

I dont want to remove the ROW one as i dont want to lose the LTE service that is the only thing working right now.

Any suggestions would be very much appreciated. Thank you again.

 

[Wish39]

Thank God there is still people here helping out. thank you.

I was wondering if anybody can give me a hand.
I have an LG v40 that is supposed to be an ATT model v405UA. when i got it it had android 8, and couldnt upgrade to anything unless i was on ATT network, so i flashed android 10 that was a stock back up i found on xda that is also an ATT rom. The device is supposed to be carrier unlocked but figured i should get att sim card anyway and get it overwith but even then i cannot get VOLTE provisioned at all and i dont know why.

I tried the universal enabler method with no luck. then i tried opening up the modem profiles on PDC as described here. I see an "att" and "row_att". Its seems like the phone always wants to be on the ROW one and i tried deactivating that one and trying to activate the plain ATT one but the phone goes back to ROW after a few seconds.

I dont want to remove the ROW one as i dont want to lose the LTE service that is the only thing working right now.

Any suggestions would be very much appreciated. Thank you again.

Try activating the ATT profile first, then remove the ROW_ATT profile. If that doesn't work you can always load back the ROW profile. All of the profiles should be in the modem partitions, you can probably get those from that backup you flashed.

 

[VinniStag]

Try activating the ATT profile first, then remove the ROW_ATT profile. If that doesn't work you can always load back the ROW profile. All of the profiles should be in the modem partitions, you can probably get those from that backup you flashed.

Thank you for your response Wish, I was able to activate plain ATT profile and delete the ROW as you describe. However VOLTE is still not provisioned when i look inside the info menu (*#*#4636#*#*).

I have no clue why this thing is not working. Do you have any other ideas i could try?.

Thank you again for your time.

 

[Wish39]

Thank you for your response Wish, I was able to activate plain ATT profile and delete the ROW as you describe. However VOLTE is still not provisioned when i look inside the info menu (*#*#4636#*#*).

I have no clue why this thing is not working. Do you have any other ideas i could try?.

Thank you again for your time.

If it's still not provisioning, then if you are an AT&T customer contact their support and have them see if they can provision the phone for VoLTE. I suspect for some reason AT&T's network is not provisioning the phone even though it's an actual AT&T device.

 

[VinniStag]

If it's still not provisioning, then if you are an AT&T customer contact their support and have them see if they can provision the phone for VoLTE. I suspect for some reason AT&T's network is not provisioning the phone even though it's an actual AT&T device.

Yea, im starting to guess this is an issue with them and not the phone. thank you again mate.

 

[mangojain]

Thank you again for the files. I really appreciate it.

I tried replacing these in OP/Config. Unfortunately I still don't have VoLTE or VoWifi. I can see that the profiles for Indian carriers are added in Master Config from Universal Enabler. However the VoLTE doesn't work. I even tried removing SIM and putting it back in.

I hope there are no more steps after replacing the files.

Try restoring the values of cust.prop and put the same parameters in vo_config. It could turn on volte but make your phone unstable . . .

 

[surgemanx]

I noticed this when I upgraded to android 12 EA firmware. The QMICM mode doesn't show up in device manager or show any sign. But I downgraded to TM android 11 Firmware and it works. I don't know if this is a bug or they've patched it on Android 12. If anyone on Android 12 got it to work please let us know.

11 only...won't work on a12

 

[nightstars998]

I crossflashed my LG g8 820UM (Sprint) with a11 US cellular's
G820UM30b_00_USC_US_OP_0105.kdz using the sprint guide. I'm using mint mobile. I have HD Voice Enabled. I followed this guide to install TMO OPEN mbn but my mobile network state is still disconnected and IMS registration status is not registered although tmo is active. Would like to know if there is hope of getting volte to work or should I just get a new phone. Thank you for reading this. If you would like more information, please let me know. I got this phone less than a year ago because on the mint compatable page, it is compatible with the type but when I typed in the imei later, it said it's not compatible.

 

[nightstars998]

I have a Sprint LG G8, and there was an option to enable VoLTE and WiFi Calling, but WiFi calling did not work. I just went through the process of flashing a new US Open a11 VDZ. Then I followed the instructions in the post and was able to successfully complete all of the steps with no errors. I also enabled the VoLTE and VoWiFi in the Universal Enabler; however, for some reason I no longer have WiFi Calling or VoLTE options in my settings. :/

How can I restore those options?

Looks like the problem might be that I flashed a US Cellular KDZ. Gonna need to track down a different one, I think.

Which kdz did you end up using?

 

[Wish39]

I crossflashed my LG g8 820UM (Sprint) with a11 US cellular's
G820UM30b_00_USC_US_OP_0105.kdz using the sprint guide. I'm using mint mobile. I have HD Voice Enabled. I followed this guide to install TMO OPEN mbn but my mobile network state is still disconnected and IMS registration status is not registered although tmo is active. Would like to know if there is hope of getting volte to work or should I just get a new phone. Thank you for reading this. If you would like more information, please let me know. I got this phone less than a year ago because on the mint compatable page, it is compatible with the type but when I typed in the imei later, it said it's not compatible.

You need the KDZ for the factory unlocked model, G820QM, to have VoLTE support for all carriers. US Cellular firmware is NOT the unbranded firmware and will only have support for US Cellular VoLTE.

 

[mrsyamsul]

LG V60 T mobile. Android 12 so sad cannot set volte. But at least got vowifi. Hopefully can setup volte soon

 

[Sykander]

Try restoring the values of cust.prop and put the same parameters in vo_config. It could turn on volte but make your phone unstable . . .

OK, I've given this a shot too. But doesn't do anything.

I suspect the problem might be something to do with LG IMS.

The device doesn't seem to register with airtel - I'm basing this on the info from troubleshooting section of airtel app and phone info from app called netmonster - I've attached screenshots.

I thought copying the files from Indian g8x might have fixed this, but apparently its not.

I visited airtel store and got the sim changed too, still no luck.

 

[Sykander]

Try restoring the values of cust.prop and put the same parameters in vo_config. It could turn on volte but make your phone unstable . . .

New Update!!

VoLTE and Vowifi finally working on Airtel.

Right after my last reply, it occurred to me that I should try my wife's SIM in my phone. And when I did, VoLTE and Vowifi were working on my phone.

So I rushed back to the Airtel store and after explaining everything, and even getting them to put of their SIM in my phone they raised a ticked to fix the problem.

And now in the evening I got a call from airtel to check - thankfully it's working. Ims also showing as registered.

For some reason it still doesn't seem to detect my phone number - but as long as volte and vowifi work I couldn't be bothered.

I'll check Jio and Vodafone when I can get my hands on a sim.

Thank you very much for your replies, files and advice. Cheers.

 

[Zanketsu]

Hey guys, I've also got the Korean variant - love it but without VoLTE it's a glorified paperweight.
Has anyone managed to root the Korean model and upload the carrier VoLTE profiles and can share how? I'll buy a virtual beer!

Cheers!

 

[Sykander]

Hey guys, I've also got the Korean variant - love it but without VoLTE it's a glorified paperweight.
Has anyone managed to root the Korean model and upload the carrier VoLTE profiles and can share how? I'll buy a virtual beer!

Cheers!

Which country are you trying to use the device in? For USA the process described in this thread should work. For EU there is a magisk module you can try.

 

[Zanketsu]

I live in Poland/EU. I've read above in the thread that OP's method does not work for the Korean variant (LM-G820N) and that it's finicky to root. Hence my ask.

 

[Sykander]

I live in Poland/EU. I've read above in the thread that OP's method does not work for the Korean variant (LM-G820N) and that it's finicky to root. Hence my ask.

OK, in that case you can join the telegram group for lg g8, v50 and ask the folks there.

For EU I think may need root to get volte.

Ps: I have Korean V50 which i rooted and now managed to get volte working on.

 

[mangojain]

New Update!!

VoLTE and Vowifi finally working on Airtel.

Right after my last reply, it occurred to me that I should try my wife's SIM in my phone. And when I did, VoLTE and Vowifi were working on my phone.

So I rushed back to the Airtel store and after explaining everything, and even getting them to put of their SIM in my phone they raised a ticked to fix the problem.

And now in the evening I got a call from airtel to check - thankfully it's working. Ims also showing as registered.

For some reason it still doesn't seem to detect my phone number - but as long as volte and vowifi work I couldn't be bothered.

I'll check Jio and Vodafone when I can get my hands on a sim.

Thank you very much for your replies, files and advice. Cheers.

Happy to hear it's finally working. Airtel and Vodafone are like that, they don't enable these basic features by default, God knows why . . Jio will work without any problem for sure.

 

[Sykander]

Happy to hear it's finally working. Airtel and Vodafone are like that, they don't enable these basic features by default, God knows why . . Jio will work without any problem for sure.

Thank you again for your help.

 

[LuVul]

Hi guys. I have a V60 LMV600AM. Just update it to Android 12. Using a H2O sim card. Can't get volte.
Any way to downgrade Android 12 to 11 in this AT&T phone? Even if downgrade to 11, any one successfully add volte to use in H2O? Thank you so much!