yashsingh1/xdaforums huggingface dataset:
[OnePlus 5T  Guides, News, & Discussion] cezarvrabie:
I follow a thread(650+ pages) on a romanian forum where there are a bunch of people with OnePlus devices and I haven't seen one post of someone who got volte to work without switching to a different profile in PDC on any carrier in my country. I don't have an explanation as to why it works, but at least for me it did.
[OnePlus 5T  Guides, News, & Discussion] cezarvrabie:
I've looked a little more into the non-hlos.bin file. For whatever reason it doesn't get back to oversea-commercial even if I manually flash the file via fastboot with the command fastboot flash modem NON-HLOS.bin (extracted from the .zip ROM file) . The command is successful on my computer, but in PDC oversea-commercial is still missing. This is very weird. Have you guys ever seen this before? These settings in PDC seem to stick no matter what. The only way that I was able to change them is with an EFS backup. I removed a random profile in PDC and after I restored an EFS backup in TWRP the just removed profile reappeared.

I'm pretty sure that at one point I not only deactivated oversea-commercial, but also removed it. I'm fine with not having it anymore, but I just find it weird how my phone basically never goes back to default profile settings after factory reset, update etc.
[OnePlus 5T  Guides, News, & Discussion] renzs:
So basically, no root no VoLTE?
[OnePlus 5T  Guides, News, & Discussion] cezarvrabie:
After a lot more digging I had a problem with my phone that had a side effect of making the profiles from PDC stick after factory reset. So basically you really can't activate it at all.
[OnePlus 5T  Guides, News, & Discussion] tbruckert:
Damned, I don't know why but I got the error " QMI Connection not ready, please use USB driver version 1.00.32 or later and fix the connection before using PDC tool".

I don't figure why I got this error since I've managed to do this before the android 10 update but now I can't even reach PDC settings.

I've tried uninstalling the drivers, trying on a 2nd computer but everything ends in this "QMI connection not ready" error. :confused:

I've seen that I'm not the only one facing this issue but I haven't seen any solutions... :(

That's sad since my home feels like a bunker and I can't phone frome inside and I really need to phone nowadays :eek:
[OnePlus 5T  Guides, News, & Discussion] fyama:
There is no ”Function switch”

I tried to enable VoLTE on my oneplus5(A5000).

There is no ”Function switch” menu in oneplus logkit on my phone.

What do I need to do to enable this feature?

---------- Post added at 02:07 AM ---------- Previous post was at 01:45 AM ----------

Sorry, There is no ”VoLTE switch” menu in Function switch on my phone.
[OnePlus 5T  Guides, News, & Discussion] tbruckert:
Same for me, I've had to upgrade the app.

The main problem is, because I've done this, I got an error in PDC, please help I'm not the only one facing this and saw 0 answer to this problem :/
[OnePlus 5T  Guides, News, & Discussion] jukyO:
OnePlus 6T OOS 10.3.3 - works

Hello guys,

managed to do it on stock OOS 10.3.3 on OnePlus 6T,no root, no TWRP, only bootloader was unlocked.

1. Download needed files from here:

https://xdaforums.com/showpost.php?p=82351723&postcount=1201

https://xdaforums.com/showpost.php?p=82407307&postcount=1215

2. Install downloaded apks to phone, so you can use *#801# and *#800# Menus.

3. Install downloaded "QUD.WIN.1.1+Installer-10037.3+Setup" and "QPST_2.7.460" to PC

4. Follow instructions from OP

Note: I could not enable " Full-port switch", only serial, but it worked even without it.
[OnePlus 5T  Guides, News, & Discussion] mnurolcay:
Still same error for me. Installed two apks. After dialing *#801# it asks to choose btw EngineerMode or FactoryMode. When choosing EngineerMode, enabling serial results with a crash. Enabling only Full-port results with same PDC error. If i choose FactoryMode and following OP, same error again.
[OnePlus 5T  Guides, News, & Discussion] hololodilolo:
Enable full-port first then enable serial. It might crush and close the app but you can continue the steps. I have same problem and this solutions is always working. Good luck. :good:
[OnePlus 5T  Guides, News, & Discussion] arazvan2002:
Is there anyone with oneplus 6 or 6T on sw 10.3.2 (or any other android 10 older build) ? I need the content of /data/vendor/modem_config.

I discovered that on 10.3.3 the files with sig extension for vodafone uk, spain, italy disappeared and I can't see those profiles in PDC. So the mbn files are not enough. The Vodafone UK was good for volte, vowifi and HD+ abd and it worked until I updated with last OTA.

Also an EFS backup would be good. I don't know what to do with it at this moment but I've seen around here about it.
[OnePlus 5T  Guides, News, & Discussion] mnurolcay:
Are we talking about OP 5T ? Because i really tried a lot of times. Yet same "QMI connection is not ready error..."
[OnePlus 5T  Guides, News, & Discussion] arazvan2002:
On Android 10 pdc and efs explorer are working just with switch port, without serial.
[OnePlus 5T  Guides, News, & Discussion] Crappyvate:
Can someone please share link for the latest version of PDC?
[OnePlus 5T  Guides, News, & Discussion] arazvan2002:
https://www.qpstflash.com/
[OnePlus 5T  Guides, News, & Discussion] gsser:
Here is a quick method how you can/might get volte and vowifi on oos 10.

Step 1: First get on oos 9.0.11, then setup everything like recovery etc. After that open pdc, deactivate overseas modem then remove it. At the bottom of the list you should see vodafone volte india. Make it active for sub 0 and sub 1, then press on the activate.

Step 2: Boot to recovery, backup modem and efs partition. After that copy twrp folder to your pc (incase you lose it somehow like formatting data).

Step 3: Flash the oos 10 rom. Setup everything again, now copy the twrp folder back to your internal storage root. Then reboot to recovery. Restore efs and modem backup and reboot. This way you will have your modified modem/efs without using pdc on oos 10. This method works with aosp 10 roms. Dunno if it will work with oos 10 cause i didnt try.

Btw i didnt find this out. Credit goes to https://t.me/enesykaya

Edit: doesnt work
[OnePlus 5T  Guides, News, & Discussion] deepongi:
it doesn't. that only works for aosp roms that use 9.0.11 modem with timestamp from that release, 20200224.. take aicp rom for example.

regards.
[OnePlus 5T  Guides, News, & Discussion] gsser:
Yeah sadly i can confirm... Restoring doesnt matter on oos because when i restore it only restores sub1 and not sub0. If only it could restore both sub0 and sub1 we would have volte and wifi calling
[OnePlus 5T  Guides, News, & Discussion] nirmalts:
Doesn't work with 10.3.3.

I am with Telekom in Germany. Before 10.3.3, I only had to install OpenPlusLogKit and enable VOLTE with it. After updating to 10.3.3, although the settings show VOLTE, it doesn't turn the feature on. Anyone got it working with 10.3.3?
[OnePlus 5T  Guides, News, & Discussion] arazvan2002:
Extract the mbn files from a modem.img image. I used the one from 10.3.2. You can open it with 7zip. Maybe I will upload thr full content. Then, thr mbn file ( I used Vodafone UK) can be uploaded to PDC. If you had a good profile before, you can load that one. The img file can be obtained by unpacking the full rom with payload_dumper.

SO, no need for tricky operations like restoring partitions in twrp which can brake something else. Just Load favorite profile in pdc. Be shre it's from a working version (file is signed), otherwise it doesn't show in PDC list.
[OnePlus 5T  Guides, News, & Discussion] yag1z41:
Hocam hangi operatör kullanıyorsunuz ve sanırım bu rootsuz şekilde olmuyor?
[OnePlus 5T  Guides, News, & Discussion] jukyO:
I am in Croatia, but got it working. See my howto several posts back.
[OnePlus 5T  Guides, News, & Discussion] Crappyvate:
[MENTION=741379]arazvan2002[/MENTION]

I'm trying to do just that, I have a profile I deleted by mistake and would like to reload it in PDC. What is the .mbn that contains the profiles? I unpacked the ota .zip for 9.0.11 but under firmware-update I see a bunch of .mbn files! Thanks
[OnePlus 5T  Guides, News, & Discussion] arazvan2002:
Try with full rom where you will find a modem.img. The name of the profile is the same for all files, but they are gouped by continent, country, operator.

Something like this: modem.img\image\modem_pr\mcfg\configs\mcfg_sw\generic\eu\vodafone\volte\uk\mcfg_sw.mbn

I will try to extract from a Pie rom. I'm on Android 10. Why do you need for Pie, aren't you already on Android 10?
[OnePlus 5T  Guides, News, & Discussion] Crappyvate:
Still on Pie 9.0.11, waiting for stable to move to 10. I reflashed the 9.0.11 but it do not have a modem.img so SOL. If you can extract that'd be great, I'm specifically looking for the Volte-ATT profile which I erased by mistake. Thanks again.
[OnePlus 5T  Guides, News, & Discussion] arazvan2002:
I attached what I had now in my computer. There are files for android 9(august2019) and 10. (nov-dec 2019)
[OnePlus 5T  Guides, News, & Discussion] Crappyvate:
Brilliant! Last question do you know if these .mbn profiles are phone specific?
[OnePlus 5T  Guides, News, & Discussion] dwardo:
I've used the modem.img of oos 10.3.0 combined with lineageos 16.0 (i.e. android 9) to get the mbn i wanted (orange_france_commercial).... So I'd say mbn and android version are not linked....
[OnePlus 5T  Guides, News, & Discussion] etiennedefqvx:
Hello,

I did this on my OP5 and this seems to work great for VoLTE. However, I feel like it's not working for VoWiFi.

Is there a way to check that VoWiFi works ?
[OnePlus 5T  Guides, News, & Discussion] Crappyvate:
[MENTION=3502594]dwardo[/MENTION]

Did you flash the whole modem.img or did you just load the .mbn through PDC? So far every .mbn file I try to load through PDC does not appear anywhere...
[OnePlus 5T  Guides, News, & Discussion] arazvan2002:
Be sure that you load a signed mbn file and then you will see it in PDC. Usually it has a *.SIG file next to it.
[OnePlus 5T  Guides, News, & Discussion] Crappyvate:
I tried to load the ones I got from you trough PDC, they are both signed but they don't show up. Bizarre!
[OnePlus 5T  Guides, News, & Discussion] dwardo:
I had flashed the whole modem.img
[OnePlus 5T  Guides, News, & Discussion] Crappyvate:
i see the .sig file but not able to load it PDC, any idea?
[OnePlus 5T  Guides, News, & Discussion] dwardo:
Load the mbn file

---------- Post added at 07:14 PM ---------- Previous post was at 07:13 PM ----------

Load the mbn file directly from pdc
[OnePlus 5T  Guides, News, & Discussion] Crappyvate:
I did but nothing happens, it does not appear in the list of profiles available, this is due to Oneplus adding the .sig file but don't know how to get around that?
[OnePlus 5T  Guides, News, & Discussion] shizla:
It did not work. Also my wifi and mobile data crashing continuously.
[OnePlus 5T  Guides, News, & Discussion] renzs:
Have you tried on latest beta 3?

Not able to try yet. No pc access for me atm
[OnePlus 5T  Guides, News, & Discussion] cezarvrabie:
Still doesn't work on Beta 3.
[OnePlus 5T  Guides, News, & Discussion] sabanook:
I'm not sure if my solution will help you, but I received exactly the same error when connecting to a USB 3.x port on my PC. Today I tried a USB 2.x port and the PDC worked as usual. It's worth a try.
[OnePlus 5T  Guides, News, & Discussion] panoramixmeister:
I just updated my 5T to the latest Android 10 stable ROM that just came out.

From what I am reading everyone (including myself) with Android 10 installed is having the same issue with PDC and error message "QMI Connection not ready, please use USB driver version 1.00.32 or later and fix the connection before using PDC tool".

Is there someone that has found a solution to this?

Cheers
[OnePlus 5T  Guides, News, & Discussion] tiniba:
I have the same problem.
[OnePlus 5T  Guides, News, & Discussion] wholehog2:
I too have the same problem. I ckek wich driver version i have and it's the 1.00.39. So I think it's a rom problem and don't find a solution.
[OnePlus 5T  Guides, News, & Discussion] twinsen.net:
Does not work anymore with Android 10 stable (and betas too) on OnePlus 5 :(
[OnePlus 5T  Guides, News, & Discussion] captainpuppet:
Same problem here...phone not recognized in the PDC tool...
[OnePlus 5T  Guides, News, & Discussion] renzs:
I've been using USB2.0 all along and it doesn't work on OP5T since Beta1 :(
[OnePlus 5T  Guides, News, & Discussion] markstein:
Is it an idea to try FactoryMode version V1.01 (28) (old version from Android 9) com.oneplus.factorymode. Could that be a solution?
[OnePlus 5T  Guides, News, & Discussion] sabanook:
PDC: QMI connection not ready,

I tried two further USB ports. The PDC works on my PC on two different USB 2.x ports, but not on two different USB 3.x ports. I get the strange error "QMI connection not ready, please use USB driver version 1.00.32 or later and fix the connection before using PDC tool". I just plug the cable into one connector and get the error and plug the connector into another one and can edit the PDC phone profiles. This is reproducible.

It's probably not a matter of USB 2.x / 3.x, but it obviously has something to do with the USB port I'm connecting the phone to.
[OnePlus 5T  Guides, News, & Discussion] sxspawn:
Hello! can you give links to the software that is installed on your computer?
[OnePlus 5T  Guides, News, & Discussion] sabanook:
sure

Qualcomm QPST Diag x64 driver

QPST_2.7.474

Engineering Mode App
[OnePlus 5T  Guides, News, & Discussion] renzs:
just to confirm, you're on OP5T? 10.0 stable or beta?

edit: just tested on all 3 USB 2.0 ports not working. 2 different cables. same error msg
[OnePlus 5T  Guides, News, & Discussion] sabanook:
OP 6 stable 10.3.3
[OnePlus 5T  Guides, News, & Discussion] markstein:
No solution for 5T yet? Flashing a modded file when rooted?
[OnePlus 5T  Guides, News, & Discussion] rahatbek:
there's new 2.7.480 version of qpst able to download. but it don't solve our problem.
[OnePlus 5T  Guides, News, & Discussion] Gusko:
[IMG="ScreenShot"]https://drive.google.com/file/d/14WkOuAUDUlqjea6-c5RHedFnVm_nOf4e/view?usp=sharing[/IMG][IMG="Screenshot"]https://drive.google.com/file/d/14WkOuAUDUlqjea6-c5RHedFnVm_nOf4e/view?usp=sharing[/IMG]Hello Dear Fellows, I have succeed VoLTE/VoWiFi enable!!

Owner 1+5 oos 10.0.0
[OnePlus 5T  Guides, News, & Discussion] mnurolcay:
How and anything special or different you did?
[OnePlus 5T  Guides, News, & Discussion] Gusko:
Maybe I was lucky!!
[OnePlus 5T  Guides, News, & Discussion] rideordie16:
QPST version ?

Qualcomm Driver version ?

USB 2.0 or USB 3.0 ?
[OnePlus 5T  Guides, News, & Discussion] Rino_:
Had you clean install Android 10.0.0?

What you do?
[OnePlus 5T  Guides, News, & Discussion] Gusko:
I haven't a clean install, I was on 9.0.11 with volte enabled.

So when I pass on 10.0.0 already have swithces with volte.

I install QPST agiain

I was uninstall the Qualcomm driver from win 10 and install it again then everything works again!!
[OnePlus 5T  Guides, News, & Discussion] aboicu:
Clean cache, restart the phone and report back if you still have VOLTE and VoWifi

---------- Post added at 02:50 PM ---------- Previous post was at 02:49 PM ----------

Do you still have icons up in status bar or you just have buttons in settings?
[OnePlus 5T  Guides, News, & Discussion] johnnyslt:
Hi Guys,

I managed to get Volte working on my OP5 using this guide: https://xdaforums.com/rog-phone-2/how-to/guide-enabling-volte-vowifi-v2-t4028073

*Make sure you backup your EFS partition before starting !

*I used CMD(run as Administrator) to execute the commands (PowerShell was causing issues)

Start from Step 2, and activate the Serial and Full-port switch from *#801#, then move on like in the guide.

Phone was connected through USB, and QPST must recognize the phone like the below:

[IMG="33"]https://dl3.pushbulletusercontent.com/tbgQUDdgAXkvogYAv7OcrSkrGEnMRvpT/Capture.PNG[/IMG]

You can activate the Volte and VoWifi options using this Magisk module https://github.com/edgd1er/voenabler/releases, or any echivalent (module, app, prop).

For MBN's just copy one that's already included in the stock OOS and it used to work for you in PDC:

/vendor/firmware_mnt/image/modem_pr/mcfg/configs/mcfg_sw/generic

mcfg_sw/generic/apac/airtel/volte/mcfg_sw.mbn
mcfg_sw/generic/apac/idea/commerci/mcfg_sw.mbn
mcfg_sw/generic/apac/reliance/commerci/mcfg_sw.mbn
mcfg_sw/generic/apac/vodafone/volte/india/mcfg_sw.mbn
mcfg_sw/generic/china/cmcc/commerci/volte_op/mcfg_sw.mbn
mcfg_sw/generic/china/cmcc/lab/conf_vol/mcfg_sw.mbn
mcfg_sw/generic/china/cmcc/lab/nsiot_vo/mcfg_sw.mbn
mcfg_sw/generic/china/cmcc/lab/tgl_comb/mcfg_sw.mbn
mcfg_sw/generic/china/ct/commerci/openmkt/mcfg_sw.mbn
mcfg_sw/generic/china/ct/lab/cta/mcfg_sw.mbn
mcfg_sw/generic/china/cu/commerci/volte/mcfg_sw.mbn
mcfg_sw/generic/eu/ee/commerci/mcfg_sw.mbn
mcfg_sw/generic/eu/elisa/commerci/fi/mcfg_sw.mbn
mcfg_sw/generic/eu/h3g/commerci/denmark/mcfg_sw.mbn
mcfg_sw/generic/eu/h3g/commerci/uk/mcfg_sw.mbn
mcfg_sw/generic/eu/telefoni/commerci/uk/mcfg_sw.mbn
mcfg_sw/generic/eu/vodafone/volte/netherla/mcfg_sw.mbn
mcfg_sw/generic/na/att/volte/mcfg_sw.mbn
mcfg_sw/generic/na/tmo/commerci/mcfg_sw.mbn
mcfg_sw/generic/oem/lab/volte_pt/mcfg_sw.mbn
mcfg_sw/generic/oem/lab/volte_te/mcfg_sw.mbn
mcfg_sw/generic/oem/oversea/commerci/mtnl_bsn/mcfg_sw.mbn
mcfg_sw/generic/oem/oversea/commerci/mcfg_sw.mbn
mcfg_sw/generic/sea/cht/commerci/mcfg_sw.mbn
mcfg_sw/generic/sea/fareasto/commerci/mcfg_sw.mbn
mcfg_sw/generic/sea/ytl/commerci/mcfg_sw.mbn
mcfg_sw/generic/common/row/commerci/mcfg_sw.mbn

Proof:

[IMG="11"]https://dl3.pushbulletusercontent.com/71XYvKkEuofBTHY7PKEqHhAT9vutQaUk/Screenshot_20200607-165743.jpg[/IMG]

[IMG="22"]https://dl3.pushbulletusercontent.com/1EwkdAGAaxzwI6AL2T1nra775JLSeEmT/Screenshot_20200607-164813.jpg[/IMG]

Enjoy ! ;)
[OnePlus 5T  Guides, News, & Discussion] Gusko:
I clean cache several times and works again.

I see that its not working all the time Volte sign comes and goes.

I choose on pdc uk telefonica.
[OnePlus 5T  Guides, News, & Discussion] Gusko:
Right now it's working!!

Maybe my WiFi is having issues!!
[OnePlus 5T  Guides, News, & Discussion] markstein:
Didnt work for me with the Mi9T mbns. Can you please upload the mbn from OnePlus 5T for UK Telefonica Commercial.

Thank you.
[OnePlus 5T  Guides, News, & Discussion] faidra12:
Can u upload these Mbns files?

Thank you, Can u upload these Mbns files?
[OnePlus 5T  Guides, News, & Discussion] twinsen.net:
Hey, what if someone does not have rooted phone? What to do? Step by step please.

BTW problem with OP5 is now that on Android 10 and Windows 10, the driver provided in Opening Post does not work.

It does not initialize. Says the signature is bad.

Ok, the efstool works, and uploads something, but no single mbn works on OP5.

I need for polish Plus GSM, and nju (Orange).
[OnePlus 5T  Guides, News, & Discussion] markstein:
Be careful with the new method. It has not worked for me. EFSTOOLS destroyed the EFS partition and I had to restore (Fortunately I had a backup!)
[OnePlus 5T  Guides, News, & Discussion] twinsen.net:
I just had analysed it and I realized, that without the root - this tool does nothing (thus EFS is read-only then). It says it uploads something but nothing happens.

We need a method for non rooted devices. My daily driver is a non rooted phone as I don't have time to play with all those Magisk, Safety.Net things - I just need simply working device.

PDC was the safest method, but it does not work anymore. So I think we still need to wait until someone develops new reliable method.
[OnePlus 5T  Guides, News, & Discussion] Pinguin1337:
Does efstools work under a custom rom too? (crdroid 6.6 / Android 10)
[OnePlus 5T  Guides, News, & Discussion] panoramixmeister:
---------- Post added at 13:46 ---------- Previous post was at 13:24 ----------

[/COLOR]

Thank you for the info.

Can you please specify how we can get these files from OOS? I can't seem to find them in the OOS.zip file.

I used the guide on the other thread and installed Telefonica_UK_Commercial MBN file from Mi 9T but didn't work.

I know that mine worked using OOS India-VoLTE-Vodafone.

Would you be so kind as to post here the MBNs from OOS either from India-VoLTE-Vodafone or Telefonica_UK_Commercial?

It would be greatly appreciated.

Thanks in advance!

*** EDIT ***

I found the files using root explorer and followed the instructions. It's alive!!!!!!!!!

Thank you very much for the info provided!
[OnePlus 5T  Guides, News, & Discussion] twinsen.net:
I still don't know how to do it. I don't have any mbn's on my stock OOS. Especially I don't have the path /vendor/firmware_mnt

When I try to use the mbn's shared for Xiaomi from that instruction - during the upload it says some error regarding IMS.

Do you have root?
[OnePlus 5T  Guides, News, & Discussion] markstein:
Can you please provide the two files and describe the exact steps you made.
[OnePlus 5T  Guides, News, & Discussion] panoramixmeister:
You need to have root to access this.
[OnePlus 5T  Guides, News, & Discussion] rideordie16:
India-VoLTE-Vodafone

https://drive.google.com/file/d/1Bi-OCdsvr6cUcDUffEs0UZEe6XcV3yIY/view?usp=sharing
[OnePlus 5T  Guides, News, & Discussion] Gusko:
My device isn't rooted and I have locked the bootloader.

Anyway I'm believing 100% that the problem is the driver and only an updated driver will solve the problem!!
[OnePlus 5T  Guides, News, & Discussion] twinsen.net:
PDC worked on non-rooted devices. We need to say it loud - the solution provided few posts above is ONLY FOR ROOTED devices :(

Not all people need root. I don't need it at all for example.
[OnePlus 5T  Guides, News, & Discussion] the_lonewolf:
It worked! Thanks a lot! :good:
[OnePlus 5T  Guides, News, & Discussion] bgumble:
Wouldn't it be easier just to upload the two modified efs partitions?

**edit

I think EFS partitions are individual to the phone :eek:
[OnePlus 5T  Guides, News, & Discussion] panoramixmeister:
India VoLTE - https://drive.google.com/file/d/1Bi-...ew?usp=sharing posted by another user.

I then followed the steps from this thread https://xdaforums.com/rog-phone-2/how-to/guide-enabling-volte-vowifi-v2-t4028073 again posted by another user. Just read it through and follow the instructions.

---------- Post added at 21:50 ---------- Previous post was at 21:06 ----------

I have noticed that although VoLTE works fine with both sims, VoWiFi doesn't work. I tried with both India Vodafone and Telefonica UK MBNs with no success. I have both options activated in the preferences and I have VoWiFi as the preferred option.

I don't mind that much, it's better to have activated at least VoLTE rather than nothing but it seems odd to me that VoWiFi doesn't work.

Does VoWiFi work for you?
[OnePlus 5T  Guides, News, & Discussion] HubertGT:
It's working - VoLTE and VoWifi. Finally somebody managed to do it. Thank You :D
[OnePlus 5T  Guides, News, & Discussion] johnnyslt:
The PDC not working is not a driver problem. Oneplus disabled or forgot to enable something in the ROM/Kernel...

Yeah, I should've mentioned that this method works only with root. Although it probably would work without it.

In theory, the "flashing" of the MBN file can be done without root since it uses *#801# to activate serial and full-port switch mode.

You only need somehow to enable the Volte and VoWifi settings without root. I think I saw in one of the other OnePlus forums the old OnePlus Toolkit app, where you can enable them. If you are feeling bold, search for it and try it. :) No guarantees, but you should be fine as long as you have an EFS backup.

Yes, EFS is unique for each phone. ;)

Yes, on my network (Digi), VoWifi was not working initially with the magisk module (posted in my previous post), but i disabled it and tried the below method(root only):

or use the old OEMLOGKIT from Oneplus to activate Volte and VoWifi settings here : https://drive.google.com/open?id=1lXSHw-Oy9F8jnTMCdJGcxZRXx5WC7zte

and if it worked on OOS 9 it "should" work on OOS 10.
[OnePlus 5T  Guides, News, & Discussion] VoltaGe86:
Has any smart person in Australia tried this and can report success :) ??