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3UK VoLTE has stopped working

So I have updated my OP6 to the official P update all has gone well but VoLTE on 3 has stopped working. this worked on the old Oreo build either with the *#800# menu and enabling the toggles and Vo Enabler through magisk. Wonder if it's just a quirk with the new P update, EE which has official support on OP6 has working VoLTE and wifi calling. 3UK also has working wifi calling using the to methods above. If anyone has any ideas on how to fix it would be greatly appreciated.

Sorry is it possible to move this thread to Q&A i have posted it under the wrong section

[Help] [volte lost]

My VoLTE lost after installing lineage os 16 .Now not getting VoLTE on any rom which are VoLTE supported
Plz suggest me solutions
1. Flashed modem but not worked
2 . Clean flashing also not worked

Try using the Volte patch.

Even my volte lost after installing los update since 2018. Have to revert to Sep17 build. I have tried clean flashing as well.

Ritik99 said:
Try using the Volte patch.
Click to expand...
Click to collapse
I tried but after that enhanced lte service switch also disappeared

sudipt123 said:
Even my volte lost after installing los update since 2018. Have to revert to Sep17 build. I have tried clean flashing as well.
Click to expand...
Click to collapse
Have you got volte back and if yes plz help me with download links

VoLTE working on stock (twrp backuped) only not on any other rom . why?
Plz anyone help

Mi Mix3 VoWifi

Hi All,
Just wanted to check and see how is VoWifi (or wifi calling) working for you guys. I’m in Australia and has an Optus and Telstra sim in my mix 3. Phone is running the latest Xiaomi.eu rom.
I’ve search around google in general and found that to get VoWifi to work there is a need to swap the carrier profile on the Qualcomm chip which I’ve done. I have done did the *#*#VoWIFI*#*# code to disable carrier check. However I’m not able to get wifi calling working at all.
Thought I check in here and see if any of you have better luck and if there are any tricks that I’ve missed and needed to try.
Thanks

Hey guys, I just want to know that Mi Mix 3 support vowifi or not ? Or my carrier have to support that ?
I am confused

VoWifi works when on latest custom roms.

Schumi_wk said:
VoWifi works when on latest custom roms.
Click to expand...
Click to collapse
Which one does work? I could not find any confirmed VoWiFi for Mi Mix 3 yet.

Can't remember what rom it was but I have seen it somewhere.

VoWifi ("Anrufe über WLAN tätigen") is working fine for me - Vodafone Germany, Stock Global ROM. Also disabled the carrier check.

44quattrosport said:
VoWifi ("Anrufe über WLAN tätigen") is working fine for me - Vodafone Germany, Stock Global ROM. Also disabled the carrier check.
Click to expand...
Click to collapse
Thank you so much for your reply. I am from Germany as well and going with WinSim and it is not working. May I ask for the exact contract you got it running with?

I´m using Vodafone Red XS

44quattrosport said:
VoWifi ("Anrufe über WLAN tätigen") is working fine for me - Vodafone Germany, Stock Global ROM. Also disabled the carrier check.
Click to expand...
Click to collapse
Do you have mix 3 or mix 2 ? I am wondering that I have vowifi enable button on same setup page but I don't have volte enable button. Volte already enabled. My mix3 running with android 10 miui 11.0.3.0.
I found my answer Mix 3 support vowifi. But my carrier doesn't support for mix3 vowifi..

Unfortunately it is not that easy with the Mix 3. I have a simcard with working VoWifi in a Redmi Note 8 but with the Mix 3 VoWifi with the same simcard is not working. So it does not relate to the provider only for whatever reason.

Give this guide a try. Works fine for me on K-Classic (O2 Telefonica Germany) on the latest stable MIUI EU ROM. Just make sure to switch to "prefer WiFi" suboption after disabling carrier check and enabling VoWiFi. I also had to enable the profile twice on sub0 for some reason...
edit: seems that's the guide you followed even though you didn't explicitly mentioned it? You should test that your phone does not default to another profile as mentioned here

Appreciate your reply. I found a way to change the profiles without root because I did not want to root the phone. Heard many negative side effects like Google pay no longer working and Android Auto can stop working. I need both.
But with an app call shortcut maker in combination with mbnloader I was able to switch profiles. I stopped testing after a while and gave up. I went for another provider now and will see if it turns out to work with the new one. If someone got the same problem, here the mbnloader:
https://www.google.com/url?sa=t&sou...FjAAegQIBBAC&usg=AOvVaw1dWx3npHTnHOpt9a3WkMjo
After installing "shortcut maker" by android_rk from play store and the APK above, start the shortcut maker and go for activities - modem - mbnloader to select another profile.

See here:
https://forum.xda-developers.com/showpost.php?p=79955120&postcount=20
---------- Post added at 06:33 PM ---------- Previous post was at 05:46 PM ----------
See here:
https://forum.xda-developers.com/showpost.php?p=79955120&postcount=20

Three UK. Sort of working on global 9, same on xiaomi.EU 10 rom. Every few days I have to turn it off and on again to connect, but once done works flawlessly for another few days. Had to use the *# code to disable carrier check, as Three UK doesn't officially support it on most phones.

Crim Soukyuu said:
Give this guide a try. Works fine for me on K-Classic (O2 Telefonica Germany) on the latest stable MIUI EU ROM. Just make sure to switch to "prefer WiFi" suboption after disabling carrier check and enabling VoWiFi. I also had to enable the profile twice on sub0 for some reason...
edit: seems that's the guide you followed even though you didn't explicitly mentioned it? You should test that your phone does not default to another profile as mentioned here
Click to expand...
Click to collapse
Is it possible to de-root the phone afterwards? And would you mind helping me by pointing me to the right direction for preparing my phone for this guide? I am a beginner and I find it hard to find the easiest way to root my Mi Mix 3.

LePala said:
Is it possible to de-root the phone afterwards? And would you mind helping me by pointing me to the right direction for preparing my phone for this guide? I am a beginner and I find it hard to find the easiest way to root my Mi Mix 3.
Click to expand...
Click to collapse
AFAIK you have to unlock your bootloader to root, there is no exploit.
You'll have to get the mi unlock tool and probably wait 48 hours to unlock the bootloader, then flash twrp followed by flashing magisk from within twrp. Just look in the device forums for guides.
You can de-root afterwards, but I doubt locking the bootloader will work, as entries have been tampered with. Google pay/some banking apps might refuse to work after that, btw. There is a patch to gpay though.

Implementing volte in custom rom, if device hardware supports volte?

So, my devices "stock firmware" supports VoLTE (android 6). Most of the ROMs that i have seen for my device (android 7.1 based) dosen't support VoLTE. After some digging in the internet, i found out that IMS is VoLTE and VoWIFI. So i copy-pasted the apks that have "IMS" in front of them ,from my stock firmware to custom rom, doubled-checked the permissions, and rebooted my phone. VoLTE didn't work. The secret code says "VoLTE Provisioned". Am i missing something? Or am i completely wrong about this thing? The manufacturer is samsung, if that helps in a way.

it is just that volte is not supported in stock android. if you are using lineage os 14.1 then volte will break.
thank fully if ril is working in your port rom then just register play service id from playstore to google android device certification. and thus ril and volte will start working.

Thanks for the reply!
So by ril, you mean libril, right?
So if i copy libril from my stock firnware to the custom rom, will it work?
Bhanu8082 said:
it is just that volte is not supported in stock android. if you are using lineage os 14.1 then volte will break.
thank fully if ril is working in your port rom then just register play service id from playstore to google android device certification. and thus ril and volte will start working.
Click to expand...
Click to collapse

bfox89 said:
Thanks for the reply!
So by ril, you mean libril, right?
So if i copy libril from my stock firnware to the custom rom, will it work?
Click to expand...
Click to collapse
simple answer no, and
volte will not work in aosp android
but who cares every thing is possible so here is permanent fix just follow instructions carefully
VoLTE not working on AOSP ROMs
I've been using MIUI 9 global beta for a while and 3 days back I successfully unlocked my bootloader and flashed TWRP and flashed LineageOS based on Android nougat. After flashing lineage os I was not able to use Jio Volte calls. I did flash...
forum.xda-developers.com
i hope it will help.

Thanks! you helped alot!
But the post you have mentioned is for jio operator.
I will look more in this somewhere.
Thanks for helping again!

no, i mean if your phone is volte regard less of it has jio sim or not. the method works.

O2 Germany - VoWifi

Hi guys,
still in love with my mix2s but I need vowifi for reachability.
Does anyone have experience with new ROM and ability to use vowifi ? I tried Experience, LOS and Evolution. vowifi is enabled, but doesn´t work. SIM is ok, works with vowifi in an iphone.
Do I need to do an firmware upgrade? Any hints or suggestions?
thx in advance
vwsony

Hi vwsony,
vwsony said:
still in love with my mix2s but I need vowifi for reachability.
Does anyone have experience with new ROM and ability to use vowifi ? I tried Experience, LOS and Evolution. vowifi is enabled, but doesn´t work. SIM is ok, works with vowifi in an iphone.
Do I need to do an firmware upgrade? Any hints or suggestions?
Click to expand...
Click to collapse
See here what I did (also on O2 DE), - it's for LOS 17.1 but applies more or less to 18.1 and probably other Android 11-based ROMs. With LOS 18.1 it seemed to be even more fiddly than before, I had to try several sys.usb.config options before being able to write to vendor. But somehow it worked in the end.
IUC, it's basically an error in Xiaomi's firmware that auto-selects wrong settings for O2 DE - forcing it to use the settings for DT Greece seems to do the trick. There are lots of threads about it, the problem seems to be ROM-independent and concerns (or has concerned?) MIUI as well.
Viel Erfolg!