VoLTE and VoWIFI in Australia

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rotiboi

Member
Sep 1, 2021
9
6
So far I have found this, but still unable to find the VoLTE/VoWiFi toggles

Thanks for the quick reply.. i'll update if i manage to figure it out
 

rockres

New member
Mar 29, 2022
1
0
Hi All. Long time watcher, first time posting. Firstly a HUGE thank you to everyone that has contributed here, the help you have given me is amazing... for someone that has no service at home & needs WIFI calling on my ONEPLUS you have been a HUGE help, so thanks.

I've been tossing up the move to Android 12... just wondering if I should? No wifi calling makes this phone a brick for me basically. Would love to know if anyone has made the jump :)
 

Wolfillete

Senior Member
Sep 5, 2012
306
23
Madrid
I've just updated to OOS12 last night and seem to be experiencing the same. 5g works fine but i cant even find the toggle to volte or vowifi anymore. (P.s. i have turned the icons on in the settings already)

Has anyone got it working on OOS 12 already?
Same problem for me and for bunch of other people as I saw in the OPForum... Also my phone changed from KB2003 to KB2005 because of the update to global rom...
 

AmirCanb

New member
Apr 13, 2021
4
0
Hi everyone,

I upgraded my OP 8 pro to android 12. But now I can't reboot to ftm. I found it is because USB debugging is not working after reboot. I used adb and can get the list of devices. adb reboot ftm works and phone goes to reboot but turns on again.

I select always trust to this computer for debugging
 

AmirCanb

New member
Apr 13, 2021
4
0
Hi everyone,

I upgraded my OP 8 pro to android 12. But now I can't reboot to ftm. I found it is because USB debugging is not working after reboot. I used adb and can get the list of devices. adb reboot ftm works and phone goes to reboot but turns on again.

I select always trust to this computer for debugging
By the way, 5G remained available after the upgrade!
 

Goo8

New member
Apr 7, 2022
2
0
Hi everyone,

I upgraded my OP 8 pro to android 12. But now I can't reboot to ftm. I found it is because USB debugging is not working after reboot. I used adb and can get the list of devices. adb reboot ftm works and phone goes to reboot but turns on again.

I select always trust to this computer for debugging
Hi Amir,

I'm in the same boat.

I've worked out the problem, Android 12 defaults to "Charge only" for USB connections wihch is why when you perform "ADB reboot ftw", it starts up in field test mode but then doesn't detect any USB data, so just restarts back normally.

I've tried toggling the "Default USB configuration" to File transfer / Android Auto from developer options, but this doesn't seem to work anymore. So until we can work out how to force the device to default the USB mode to File transfer we are stuck.
 

phrosyn

Member
Nov 9, 2012
17
0
Has anyone done this with a custom rom?

If so, what android version and did you end up in a bootloop?
 

phrosyn

Member
Nov 9, 2012
17
0
Has anyone done this with a custom rom?

If so, what android version and did you end up in a bootloop?
I tried 'adb reboot ftm' today on nameless rom. It just rebooted to lockscreen just as stock rom does. However, it did not allow me to use the touch screen or unlock in any other way. 'adb reboot' was able to solve the issue
 

rotiboi

Member
Sep 1, 2021
9
6
Not a solution but just wanted to rant. I think ive tried about everything but still cant get volte and vowifi to work on my OP8 after update to OOS12. Will sadly move away from oneplus for my next device and i imagine i wont be the only one...
 

Goo8

New member
Apr 7, 2022
2
0
Not a solution but just wanted to rant. I think ive tried about everything but still cant get volte and vowifi to work on my OP8 after update to OOS12. Will sadly move away from oneplus for my next device and i imagine i wont be the only one...
I'll be doing the same. I never fell in love with the 8 pro. likely due to the rounded edges. I'll probably move over to Samsung S22+ until Apple release iphone with USB-C.
 

gaosong2101

New member
Jun 23, 2012
4
0

phrosyn

Member
Nov 9, 2012
17
0

MrPariah

Senior Member
Jul 15, 2018
73
10
Is anyone able to confirm if this method works on the OnePlus 10 pro? I'm interested in buying it as an upgrade from my 8T and was wondering if I could use this method to also get Volte, Vowifi and 5G on the 10 Pro
Thanks!
 

MrPariah

Senior Member
Jul 15, 2018
73
10
This method no longer works as of OOS12, but since OOS12 Volte, Vowifi, and 5G have been working natively. The Oneplus 10 Pro should work perfectly out of the box. Although I do not own one to confirm that 100%.
Hey mate thanks so much, can I ask what you're basing that off if you don't own a 10 Pro? It'd be great to not do this workaround again each time I update, if I decide to get a 10 Pro which is definitely on the cards

Cheers!
 
Hey mate thanks so much, can I ask what you're basing that off if you don't own a 10 Pro? It'd be great to not do this workaround again each time I update, if I decide to get a 10 Pro which is definitely on the cards

Cheers!
Hey Mate, I was basing this off my 9 Pro, since the OOS 12 update and the merge with Color OS codebase it has been working natively. I can only assume that is because Oppo phones with Color OS are sold in AUS.
 
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MrPariah

Senior Member
Jul 15, 2018
73
10
Hey Mate, I was basing this off my 9 Pro, since the OOS 12 update and the merge with Color OS codebase it has been working natively. I can only assume that is because Oppo phones with Color OS are sold in AUS.
Thanks mate that does make sense, is anyone able to confirm their Oneplus 10 pro supports 5g volte and vowifi since the coloros update? It's essentially the only thing holding me back from buying this phone
 

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  • 10
    Here's the screenshot & writeup of what I did:

    Here is some screenshots of 5G reception, VoLTE icon, VoWiFi icon & VoWiFi Calling while in aeroplane mode to confirm all these things are working!
    https://imgur.com/a/tau5wyX

    So what did I do? All credits go to this guy on XDA to get VoLTE & VoWiFi working: https://forum.xda-developers.com/rog-phone-2/how-to/guide-enabling-volte-vowifi-v2-t4028073

    For the TL;DR version, I did what I mentioned previously to get 5G going here:
    https://forums.oneplus.com/threads/...pro-in-australia.1225092/page-2#post-21673760
    https://forums.oneplus.com/threads/...pro-in-australia.1225092/page-3#post-21717398

    Then to get VoLTE & VoWiFi working download these files:
    EFS zip - https://drive.google.com/open?id=1PiVhB35MPx19sxqxQ4svgOvPXL1dxobt
    MBNs zip - https://drive.google.com/open?id=1v8V281EkYGI_C1KeMqVni8L2qjQLdx5P
    EfsTools 0.10 modded 1.2 - https://github.com/HomerSp/EfsTools...modded-1.2/EfsTools-0.10-modded-1.2-win32.zip
    EfsTools 0.10 modded 1.1 - https://github.com/HomerSp/EfsTools...modded-1.1/EfsTools-0.10-modded-1.1-win32.zip

    The reason I've linked both modded 1.1 & 1.2 is because 1.2 is the latest version and supports activation of 2nd SIM slot (but it errors for me so I used the modded 1.1 version but that only does SIM slot 1).

    So steps:
    - Enable the VoLTE/VoWiFi toggles first:
    - Download the OnePlus Log Kit app’s APK from > https://downloadmirror.co/1MW9/com.oem.oemlogkit_1.0-1.apk
    -Install the OnePlus Log Kit APK
    - Open dialer, type in *#800# (If this doesn't do anything, just google search "Oneplus engineer mode apk", download and install it. Then retry)
    - Click 'Enter' on the warning
    - Select 'oneplus Logkit'
    - Scroll down & select 'Function Switch'
    - tick the VoLTE & VoWiFi switch options
    - Then reboot.
    - when your phone comes back after restart, in Settings > Wifi & network > SIM & network > SIM1 (and SIM2) > you should now see the 'Enhanced communications' area have the option to toggle on VoLTE/VoWiFi

    Onto the actual making VoLTE/VoWiFi work:
    - Unzip EfsTools into a directory
    - Open command window on PC & navigate to the directory created in above step
    - On your phone, go to dialer, type in *#801# - enter into it via 'engineer mode'
    - Select "Rndis, diag switch" - ON (last time we selected "full port switch on")
    - Then in the command window, you should be able to test connection to EFStools by typing "EfsTools.exe efsInfo"
    - This should give some info & not any errors (mine was like 2 lines of information)
    - Then the real fun begins.
    - Extract the efs.zip from above download into the same directory as the EFStools (make sure the mcfg_autoselect_by_uim file is there - yes it's 0 bytes) and then run 2 commands:
    - EfsTools.exe writeFile -i mcfg_autoselect_by_uim -o /nv/item_files/mcfg/mcfg_autoselect_by_uim
    - EfsTools.exe writeFile -i mcfg_autoselect_by_uim -o /nv/item_files/mcfg/mcfg_autoselect_by_uim -s 1 (this one I couldn't get working - it's for SIM slot 2 & only works if usinf modded 1.2 version)
    - should see 0 errors
    - then open the MBNs zip & look for your carrier file. Ours are \aunz\<your carrier - e.g. mine is Telstra>\commerci\mcfg_sw.mbn
    - copy this mbn file to the same dir as the EFStools, then run 2 commands:
    - EfsTools.exe uploadDirectory -i mcfg_sw.mbn -o / -v
    - EfsTools.exe uploadDirectory -i mcfg_sw.mbn -o / -s 1 (again this one I couldn't get working - it's for SIM slot 2 & only works if usinf modded 1.2 version)
    - If it worked your screen should spew out a load of output but no errors.
    - Reboot your phone & if you already enabled the switches from my above mentioned post, you should see the VoLTE/VoWiFi icons like in the screenshots linked above.

    Seems like a lot but that's literally step by step explanation & takes roughly 5-10 mins to do slowly.

    Happy days - 5G, VoLTE & VoWiFi all working on our OnePlus 8 Pro =)
    7
    Well this is awesome! Thanks for everyone's research - I now have 5G + VoLTE + VoWiFi all working on my OnePlus 8 Pro (IN2020 model) on Android 11 (OOS 11.0.2.2) on the Telstra network.


    For some weird reason though, the "Telefonica_UK_Commercial" profile via PDC wouldn't give me 5G. Upon further investigation, I found that this profile + the carrier_policy.xml - didn't have the right config for my IN2020 phone.


    Subsequently modified the carrier_policy.xml file further and BOOM! 5G is back. Researching the carrier_policy XML further - instead of specific band enabling per the previous config - I edit it to be 'hardware' so that whatever the hardware supports, it will be made available.


    Anyhoo, long story short it's all working again thanks to you wonderful people :)


    Summary of steps taken:

    Code:
    Prerequisites:
    * Need ADB suite available on PC & enabled "ADB debugging" on phone via developer options
    * When you permit your PC adb access to the phone after first adb command, make sure you tick always permit this device. When the phone boots after "adb reboot ftm", the screen is inactive so you can't authorize the device when you try to adb shell and are stuck
    * Need QPST suite of apps installed on PC (needed PDC tools + EFS explorer)
    * If on custom firmware - probably a good idea to backup your phone before you do this. On custom firmware after the first "adb reboot ftm" rebooting again puts the device in a boot loop until you format data
    * You'll also need to ensure the toggles are enabled for VoLTE/VoWiFi before heading down this path too:
        - Enable the VoLTE/VoWiFi toggles first:
            - Download the OnePlus Log Kit app’s APK from > https://downloadmirror.co/1MW9/com.oem.oemlogkit_1.0-1.apk
            - Install the OnePlus Log Kit APK
            - Open dialer, type in *#800# (If this doesn't do anything, just google search "Oneplus engineer mode apk",                      download and install it. Then retry)
            - Click 'Enter' on the warning
            - Select 'oneplus Logkit'
            - Scroll down & select 'Function Switch'
            - tick the VoLTE & VoWiFi switch options
            - Then reboot.
            - when your phone comes back after restart, in Settings > Wifi & network > SIM & network > SIM1 (and SIM2) >                 you should now see the 'Enhanced communications' area have the option to toggle on VoLTE/VoWiFi
    
    
    Then continue onto the main process:
    - Open command prompt on PC & navigate to where your ADB suite is located
    
    - Type command without "":
        "adb devices" (I like to do this to ensure adb can speak with phone/computer)
    
    - Should display:
        List of devices attached
        <if working, your device should be listed here (else, it'll be blank)>
    
    - Type command without "":
        "adb reboot ftm"
        --> This puts phone into field test mode
    
    - Type command without "":
        "adb shell"
        --> Creates dialogue for shell command on phone
    
    - In the shell (OnePlus8Pro:/ $ ) type command without "":
        "setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb"
        --> This opens up ports that we used to be able to in Android 10
    
    - Phone Screen is still blank - but it's OK.
    
    - Start up PDC Tool in Admin mode on PC
    
    - Click drop down, select phone connection (there's only 1 in the list)
    --> **  If the drop-down box is empty and no phone/device listed, you cannot proceed.
    --> ** Other users have foudn this to be related to a Qualcomm driver issue.
    --> ** Delete the drivers you have currently installed and get a new one from here:
    --> **      https://gsmusbdriver.com/install-qualcomm-usb-driver.
    --> **  Also once the device shows up in PDC don't click on it, open efs explorer and let it start searching directories --> ** before going back to PDC and clicking on the device in the drop down.
    --> ** The window may say 'not responding' just leave it until the carrier list populates then carry on with below steps
    
    - Do the profile activation stuff for Telefonica_UK_Commercial:
        - Look for "Telefonica_UK_Commercial", right click and SetSelectedConfig for both Sub0 and Sub1
        - Click on the above profile again and click on Activate
        - Do not restart your phone
    
    - Don't close PDC yet (don't know if it make a difference but I didn't close)
    
    - Open EFS Explorer (I opened in Admin mode too)
    
    - Navigate to "\nv\item_files\ims\"
        - Replace ims_user_agent file with one supplied
        --> The supplied one has Telstra VoLTE Qualcomm as header instead of Telefonica
    
    - Navigate to "\policyman"
        - Replace carrier_policy.xml & carrier_policy.xml_Subscription01 with ones supplied.
        --> Just take carrier_policy.xml and make a copy named "carrier_policy.xml_Subscription01"
        --> ** Caveat, I further modified the carrier_policy.xml file as it wasn't enabling 5G for me on my IN2020 (Android 11) Oneplus 8 Pro.
        --> ** I changed the nr5g_sa_bands base & nr5g_nsa_bands base values to be "hardware" rather than specifically band n78.
        --> ** This changes config to allow whatever 5G bands the hardware has available rather than specific bands
        --> ** You can't enable bands that the hardware doesn't support anyway so makes sense to enable all
        --> ** This gave me the needed 5G access with Telstra
    
    - Type command without "":
        "adb reboot"
    
    After phone boots back up, 5G + VoLTE + VoWiFi are all intact and in working order!

    Again, thank you to everyone's research and efforts to get this all working!

    @Mattycee have you given this a go yet ?
    3
    Well this is awesome! Thanks for everyone's research - I now have 5G + VoLTE + VoWiFi all working on my OnePlus 8 Pro (IN2020 model) on Android 11 (OOS 11.0.2.2) on the Telstra network.


    For some weird reason though, the "Telefonica_UK_Commercial" profile via PDC wouldn't give me 5G. Upon further investigation, I found that this profile + the carrier_policy.xml - didn't have the right config for my IN2020 phone.


    Subsequently modified the carrier_policy.xml file further and BOOM! 5G is back. Researching the carrier_policy XML further - instead of specific band enabling per the previous config - I edit it to be 'hardware' so that whatever the hardware supports, it will be made available.


    Anyhoo, long story short it's all working again thanks to you wonderful people :)


    Summary of steps taken:

    Code:
    Prerequisites:
    * Need ADB suite available on PC & enabled "ADB debugging" on phone via developer options
    * Need QPST suite of apps installed on PC (needed PDC tools + EFS explorer)
    
    Process:
    - Open command prompt on PC & navigate to where your ADB suite is located
    
    - Type command without "":
        "adb devices" (I like to do this to ensure adb can speak with phone/computer)
    
    - Should display:
        List of devices attached
        <if working, your device should be listed here (else, it'll be blank)>
    
    - Type command without "":
        "adb reboot ftm"
        --> This puts phone into field test mode
    
    - Type command without "":
        "adb shell"
        --> Creates dialogue for shell command on phone
    
    - In the shell (OnePlus8Pro:/ $ ) type command without "":
        "setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb"
        --> This opens up ports that we used to be able to in Android 10
    
    - Phone Screen is still blank - but it's OK.
    
    - Start up PDC Tool in Admin mode on PC
    
    - Click drop down, select phone connection (there's only 1 in the list)
    
    - Do the profile activation stuff for Telefonica_UK_Commercial:
        - Look for "Telefonica_UK_Commercial", right click and SetSelectedConfig for both Sub0 and Sub1
        - Click on the above profile again and click on Activate
        - Do not restart your phone
    
    - Don't close PDC yet (don't know if it make a difference but I didn't close)
    
    - Open EFS Explorer (I opened in Admin mode too)
    
    - Navigate to "\nv\item_files\ims\"
        - Replace ims_user_agent file with one supplied
        --> The supplied one has Telstra VoLTE Qualcomm as header instead of Telefonica
    
    - Navigate to "\policyman"
        - Replace carrier_policy.xml & carrier_policy.xml_Subscription01 with ones supplied.
        --> ** Caveat, I further modified the carrier_policy.xml file as it wasn't enabling 5G for me on my IN2020 (Android 11) Oneplus 8 Pro.
        --> ** I changed the nr5g_sa_bands base & nr5g_nsa_bands base values to be "hardware" rather than specifically band n78.
        --> ** This changes config to allow whatever 5G bands the hardware has available rather than specific bands
        --> ** You can't enable bands that the hardware doesn't support anyway so makes sense to enable all
        --> ** This gave me the needed 5G access with Telstra
    
    - Type command without "":
        "adb reboot"
    
    After phone boots back up, 5G + VoLTE + VoWiFi are all intact and in working order!

    Again, thank you to everyone's research and efforts to get this all working!

    @Mattycee have you given this a go yet ?


    Well this is awesome! Thanks for everyone's research - I now have 5G + VoLTE + VoWiFi all working on my OnePlus 8 Pro (IN2020 model) on Android 11 (OOS 11.0.2.2) on the Telstra network.


    For some weird reason though, the "Telefonica_UK_Commercial" profile via PDC wouldn't give me 5G. Upon further investigation, I found that this profile + the carrier_policy.xml - didn't have the right config for my IN2020 phone.


    Subsequently modified the carrier_policy.xml file further and BOOM! 5G is back. Researching the carrier_policy XML further - instead of specific band enabling per the previous config - I edit it to be 'hardware' so that whatever the hardware supports, it will be made available.


    Anyhoo, long story short it's all working again thanks to you wonderful people :)


    Summary of steps taken:

    Code:
    Prerequisites:
    * Need ADB suite available on PC & enabled "ADB debugging" on phone via developer options
    * Need QPST suite of apps installed on PC (needed PDC tools + EFS explorer)
    
    Process:
    - Open command prompt on PC & navigate to where your ADB suite is located
    
    - Type command without "":
        "adb devices" (I like to do this to ensure adb can speak with phone/computer)
    
    - Should display:
        List of devices attached
        <if working, your device should be listed here (else, it'll be blank)>
    
    - Type command without "":
        "adb reboot ftm"
        --> This puts phone into field test mode
    
    - Type command without "":
        "adb shell"
        --> Creates dialogue for shell command on phone
    
    - In the shell (OnePlus8Pro:/ $ ) type command without "":
        "setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb"
        --> This opens up ports that we used to be able to in Android 10
    
    - Phone Screen is still blank - but it's OK.
    
    - Start up PDC Tool in Admin mode on PC
    
    - Click drop down, select phone connection (there's only 1 in the list)
    
    - Do the profile activation stuff for Telefonica_UK_Commercial:
        - Look for "Telefonica_UK_Commercial", right click and SetSelectedConfig for both Sub0 and Sub1
        - Click on the above profile again and click on Activate
        - Do not restart your phone
    
    - Don't close PDC yet (don't know if it make a difference but I didn't close)
    
    - Open EFS Explorer (I opened in Admin mode too)
    
    - Navigate to "\nv\item_files\ims\"
        - Replace ims_user_agent file with one supplied
        --> The supplied one has Telstra VoLTE Qualcomm as header instead of Telefonica
    
    - Navigate to "\policyman"
        - Replace carrier_policy.xml & carrier_policy.xml_Subscription01 with ones supplied.
        --> ** Caveat, I further modified the carrier_policy.xml file as it wasn't enabling 5G for me on my IN2020 (Android 11) Oneplus 8 Pro.
        --> ** I changed the nr5g_sa_bands base & nr5g_nsa_bands base values to be "hardware" rather than specifically band n78.
        --> ** This changes config to allow whatever 5G bands the hardware has available rather than specific bands
        --> ** You can't enable bands that the hardware doesn't support anyway so makes sense to enable all
        --> ** This gave me the needed 5G access with Telstra
    
    - Type command without "":
        "adb reboot"
    
    After phone boots back up, 5G + VoLTE + VoWiFi are all intact and in working order!

    Again, thank you to everyone's research and efforts to get this all working!

    @Mattycee have you given this a go yet ?

    For some weird reason though, the "Telefonica_UK_Commercial" profile via PDC wouldn't give me 5G. Upon further investigation, I found that this profile + the carrier_policy.xml - didn't have the right config for my IN2020 phone.


    Subsequently modified the carrier_policy.xml file further and BOOM! 5G is back. Researching the carrier_policy XML further - instead of specific band enabling per the previous config - I edit it to be 'hardware' so that whatever the hardware supports, it will be made available.


    Anyhoo, long story short it's all working again thanks to you wonderful people :)


    Summary of steps taken:

    Code:
    Prerequisites:
    * Need ADB suite available on PC & enabled "ADB debugging" on phone via developer options
    * Need QPST suite of apps installed on PC (needed PDC tools + EFS explorer)
    
    Process:
    - Open command prompt on PC & navigate to where your ADB suite is located
    
    - Type command without "":
        "adb devices" (I like to do this to ensure adb can speak with phone/computer)
    
    - Should display:
        List of devices attached
        <if working, your device should be listed here (else, it'll be blank)>
    
    - Type command without "":
        "adb reboot ftm"
        --> This puts phone into field test mode
    
    - Type command without "":
        "adb shell"
        --> Creates dialogue for shell command on phone
    
    - In the shell (OnePlus8Pro:/ $ ) type command without "":
        "setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb"
        --> This opens up ports that we used to be able to in Android 10
    
    - Phone Screen is still blank - but it's OK.
    
    - Start up PDC Tool in Admin mode on PC
    
    - Click drop down, select phone connection (there's only 1 in the list)
    
    - Do the profile activation stuff for Telefonica_UK_Commercial:
        - Look for "Telefonica_UK_Commercial", right click and SetSelectedConfig for both Sub0 and Sub1
        - Click on the above profile again and click on Activate
        - Do not restart your phone
    
    - Don't close PDC yet (don't know if it make a difference but I didn't close)
    
    - Open EFS Explorer (I opened in Admin mode too)
    
    - Navigate to "\nv\item_files\ims\"
        - Replace ims_user_agent file with one supplied
        --> The supplied one has Telstra VoLTE Qualcomm as header instead of Telefonica
    
    - Navigate to "\policyman"
        - Replace carrier_policy.xml & carrier_policy.xml_Subscription01 with ones supplied.
        --> ** Caveat, I further modified the carrier_policy.xml file as it wasn't enabling 5G for me on my IN2020 (Android 11) Oneplus 8 Pro.
        --> ** I changed the nr5g_sa_bands base & nr5g_nsa_bands base values to be "hardware" rather than specifically band n78.
        --> ** This changes config to allow whatever 5G bands the hardware has available rather than specific bands
        --> ** You can't enable bands that the hardware doesn't support anyway so makes sense to enable all
        --> ** This gave me the needed 5G access with Telstra
    
    - Type command without "":
        "adb reboot"
    
    After phone boots back up, 5G + VoLTE + VoWiFi are all intact and in working order!

    Mate, you're a freaking legend. (Magisk Canary root: IN2020 / Android 11 / 11.0.2.2.IN11AA / BOOST network)

    I got abit confused with the "carrier_policy.xml_Subscription01" part as it wasn't in any of the files you provided, so just assumed I had to just copy and rename the "carrier_policy.xml".

    Also EFS explorer took a little longer than I expected to start up (~1 minute) just incase anyone thinks theirs crashes and close it prematurely.

    Worked like a charm.

    Cheers
    3
    Nah, I actually used the 'ims_user_agent' File linked above by Jaansberger.

    The only thing I used from Happyboi's original exploit, was the Engineering APK File to enable 5G. However, make sure you don't install the Engineering APK before you do the initial VoLTE/VoWi-FI Process listed above by Mike_Fre.

    So basically order of steps I followed:

    - Mike_Fre's steps to enable the 'Telefonica VoLTE Qualcomm' Profile.
    - Jannsberger's step to insall the 'ims_user_agent' file (Before doing the adb reboot step listed in Mike_Fre's Post).
    - Watched and replicated the YouTube video (Which I linked in my post above), to enable 5G and still have VoLTE/VoWi-Fi.


    Hope this clears things up for you, but if you have any further questions, I'd be happy to try and help.
    That worked perfectly!!! Thankyou!!!
    3
    We have a working solution without root that is easier than previous instructions.

    You still need the old toolkit app and #*800# to activate vowan and volte functions if you haven't done in the past.

    Follow:
    {Google Translate is your friend}

    In essence...
    Download the Qualcomm tools and drivers.
    Follow the adb instructions

    adb reboot ftm
    (wait for chinese to disappear and screen goes blank)
    adb shell
    setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb

    Open the Advanced PDC tool and select the "Telefonica_UK_Commercial " (works with Vodafone, Telstra and Optus) option for sim0 and sim1. Activate.

    Do adb reboot

    Enjoy vowifi and volte.