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[Guide]Enable VoLTE forcefully if Its not activated by default

As Title Speaks, Here is Little Workground for Enable VoLTE for OP6
Limitations :-
1. Sim Must be 4G Enabled.
2. You must Live under VoLTE Enabled Circle.
3.
Steps :-
1. Open Dialer
2. type USSD code *#*#4636#*#*
3. Select phone information
4. Now select Network type *LTE/UMTS auto(PRL)
5. Reboot..
6. Done
Go in Settings
Check if Both sim have VoLTE option Enabled
Also enable Data Roaming
Hope you get VoLTE..
I got VoLTE this way.. So just sharing..
Now Here is Bug with Vodafone VoLTE, when Trying to call, Network get bounced to 2G network.. It's Bug & Already reported to OnePlus..
If you still can't get VoLTE, Wait for Update.. ??

Doesn't work for me, no volte option under both sim settings and phone info switches back, TD-SCDMA/CDMA/UMTS

neo387 said:
Doesn't work for me, no volte option under both sim settings and phone info switches back, TD-SCDMA/CDMA/UMTS
Click to expand...
Click to collapse
There should be VoLTE option for your sim..
If no, There is many chances that your SIM maybe not 4G ready or your circle don't have VoLTE feature..

neo387 said:
Doesn't work for me, no volte option under both sim settings and phone info switches back, TD-SCDMA/CDMA/UMTS
Click to expand...
Click to collapse
Needs root but the only way I got it to work here is with the magisk module.

Ya, don't go playing with the band selection, or you may just get dropped to 2g connection with no LTE possible.
After digging around, I found a fix to get LTE back.
Download the "Network Signal Guru" app from the Play Store.
I told it to "Clear Forcings" in the menu, and LTE is back up.

Cantn find The Module can You give some more Informationen?

This won't work in Europe at least, no matter how Volte ready is your network/SIM card. OnePlus just ignores the issue.

This method https://forum.xda-developers.com/on...-volte-vowifi-german-carriers-t3817542/page28 works for activating VoLTE if your operator had enabled it for you.
I tried the method in the current post, but only got the toggles in the menu and not the real thing.
Had to call the mobile operator (Telenor BG, Bulgaria) to ask them to activate VoLTE and then did the method in the linked post.
I have a non-rooted OP6 and I'm now effectively using VoLTE on my network. Hope that helps.

Hmmm, does anybody know which was the previous default setting? I would like to revert it back and don't remember what setting was set before...

fourcc said:
hmmm, does anybody know which was the previous default setting? I would like to revert it back and don't remember what setting was set before...
Click to expand...
Click to collapse
td-scdma / cdma / umts

CYB3R0ID694 said:
As Title Speaks, Here is Little Workground for Enable VoLTE for OP6
Limitations :-
1. Sim Must be 4G Enabled.
2. You must Live under VoLTE Enabled Circle.
3.
Steps :-
1. Open Dialer
2. type USSD code *#*#4636#*#*
3. Select phone information
4. Now select Network type *LTE/UMTS auto(PRL)
5. Reboot..
6. Done
Go in Settings
Check if Both sim have VoLTE option Enabled
Also enable Data Roaming
Hope you get VoLTE..
I got VoLTE this way.. So just sharing..
Now Here is Bug with Vodafone VoLTE, when Trying to call, Network get bounced to 2G network.. It's Bug & Already reported to OnePlus..
If you still can't get VoLTE, Wait for Update.. ??
Click to expand...
Click to collapse
It doesn't work with Kuwait Viva !

If you want to get VoLTE and VoWiFi menu under SIM options in your OP6 just type *#800# in default dialer (not working in ther dialers) and under oneplus logkit>Function switch there is VoLTE and VoWiFi switch This is only to have that switch visible in menu so it isnt a guarantee that VoLTE will work on your device because your network carrier must support it and if it is not supported by carrier then VoLTE will not work no matter if you enable it with menu switch

Follow my Guide to activate VoLTE and VoWiFi for OnePlus 6...

is there a way to fix volte on pie beta 1?
I was using VoLTE-OEM-Lab on 5.1.11

jamal2367 said:
Follow my Guide to activate VoLTE and VoWiFi for OnePlus 6...
Click to expand...
Click to collapse
Thanks, I used your guide and was able to enable VoLTE for my Vodafone.de LTE contract, my second card is from Sparhandy which is also I believe Vodafone but without LTE/4G, unfortunately VoWIFI is not showing up, I confirmed with Vodafone/LTE contract that it is enabled and it is, any suggestions?
TIA

somebody knows how to set up VoLTE on OOS9 ?
"Enhanced networking" missing for me

No one in Pie tried to set up VoLTE

VoLTE and VoWiFi just work, what setting up needs done?
---------- Post added at 08:17 AM ---------- Previous post was at 08:15 AM ----------
jabs said:
somebody knows how to set up VoLTE on OOS9 ?
"Enhanced networking" missing for me
Click to expand...
Click to collapse
Go to "Phone", Settings, SIM & Network Settings, then in to the SIM you want, and the VoLTE and WiFi calling is in there. It's NOT in the traditional Settings app.

jabs said:
No one in Pie tried to set up VoLTE
Click to expand...
Click to collapse
jamal2367's method (see here in English: https://forum.xda-developers.com/oneplus-5t/how-to/guide-volte-vowifi-german-carriers-t3817542) works fine with OOS9/Pie.
Just updated & patched modem config with PDC as described in the link (I'm using the config "Telefonica_UK_Commercial" for O2 in Germany) and I'm up again with VoLTE/VoWifi working..
Still a shame that Oneplus is incapable to do enable the right config by default..

but it is just that in OOS9 you miss those switches what were in OOS5.11 in "Enhanced networking, this group is all missing in Pie

TELSTRA Australia Users - I have VoWiFi all of a sudden!!??

Cant remember what exactly what I did, but I followed guides here;
https://forum.xda-developers.com/oneplus-7-pro/help/force-enable-volte-vowifi-t3934227
&
https://forum.xda-developers.com/oneplus-7-pro/how-to/guide-activate-volte-vowifi-t4116051
and
The later being the most recent. Whats even more surprising I have previously heavily de-bloated this rom using xXx No Limits to the extent VoWiFI and LTE feature aren't even available (but I understand changes carry forward as they are saved to the EFI partition)
Anyways, going to dive into to see what exact setting I enabled and will post back.
Any other Telstra users notice they have VoWiFI this morning?
Edit: Updated with PDC Setting for Telstra Volte & VoWiFi :laugh::laugh::laugh::laugh:

cantenna said:
Cant remember what exactly what I did, but I followed guides here;
https://forum.xda-developers.com/oneplus-7-pro/help/force-enable-volte-vowifi-t3934227
&
https://forum.xda-developers.com/oneplus-7-pro/how-to/guide-activate-volte-vowifi-t4116051
and
The later being the most recent. Whats even more surprising I have previously heavily de-bloated this rom using xXx No Limits to the extent VoWiFI and LTE feature aren't even available (but I understand changes carry forward as they are saved to the EFI partition)
Anyways, going to dive into to see what exact setting I enabled and will post back.
Any other Telstra users notice they have VoWiFI this morning?
Click to expand...
Click to collapse
Would be interested to know. What rom and phone version do you have? GM19?

miffymiffy said:
Would be interested to know. What rom and phone version do you have? GM19?
Click to expand...
Click to collapse
Yea, so I know have VOLTE as well!! Really a nice surprise this morning because reception hasn't been the best at home. Anyways,
I have a GM1910 (Chinese ver of One Plus 7 Pro 256Gb / 12GB running OOS 9.5.13 GM21AA with xXx No Limits magisk rom + Kirisakura custom kernel.
I have all installation files backed up as well as some are not hosted by the ops anymore.
What I need to figure out are the specific change I made to the IMEI with the qpst programs... I don't think I did anything to major in the end there, it was months ago and didn't yield any affect.
Any Telstra users have VOLTE and VoWiFi without having done anything!?
I'll post later today my PDC settings

miffymiffy said:
Would be interested to know. What rom and phone version do you have? GM19?
Click to expand...
Click to collapse
Updated post with req. PDC setting, can someone confirm if working on their end too?

No such luck on my end. I have the same model and have tried a few versions to no avail. I have had volte pop up before, but the moment I made a call it switched back to 3G. Have you confirmed them to be working? I need vowifi, i have no reception at home. Sick of facebook calling...

miffymiffy said:
No such luck on my end. I have the same model and have tried a few versions to no avail. I have had volte pop up before, but the moment I made a call it switched back to 3G. Have you confirmed them to be working? I need vowifi, i have no reception at home. Sick of facebook calling...
Click to expand...
Click to collapse
I just made an additional discovery, you also need to have "My Telstra" app installed as well just as a normal app and have run it at least once then reboot. Have you tried that?
Also, in you Sim settings you have VOLTE and WiFi calling enabled?
Volte and VoWiFi are working here, during call it he phone app will advise call is over vowifi

I'm SOL.
Got a HD1913 1+ 7T Pro.
Tried everything but cant get VoLTE or VoWIFI to work on Telstra.
Running Firmware 10.0.10.HD01AA
Have all the options enabled under Sim1 and through *#*#4636#*#* its all enabled.
Unfortunately no VoLTE sign or VoWIFI when calling. HD symbol works during calls, but thats about it.
Even have the Telstra App installed and full permissions.
UPDATE****
So i put the phone into aeroplane mode and enabled only wifi, tried to do a call and it failed, then BAMMM! VoWIFI enables itself and now I have VoWIFI enabled.
UPDATE 2****
VoLTE has enabled itself too. Looks like the trick for Telstra is to go into aeroplane mode, make a call with wifi enabled only, accept that it says called failed and it should enable VoWIFI and VoLTE.
Happy Days!!!

I'm also on Telstra (Boost mobile) and managed to get VoLTE and VoWIFI working on my OnePlus 7 (non-pro version).
I followed the guide exactly as described here: https://forum.xda-developers.com/oneplus-7-pro/how-to/guide-activate-volte-vowifi-t4116051
After I did all the steps, I rebooted and VOLTE didn't seem to work at first. But then I went into airplane mode and made a call with only Wifi enabled as kw0n2k suggested above. Then VoWIFI and VoLTE started working immediately.
When I was following the guide, the Logkit app preinstalled on my phone didn't have the VoLTE switches so I had to download the Logkit APK they recommended in the post.
For the VoLTE profile, I used "Telefonica_UK_Commercial" as mentioned in the post.

Anyone have WiFi Calling working ?

I'm in the UK and on Three network and have no option for WiFi calling (which i really need as my signal is bad at home). Anyone else have WiFi calling option appear (if so where?). The Mi 10 Pro had it enabled so disappointing this doesn't.

To disable the VoWIFI carrier check, all you have to do is enter *#*#869434#*#* in de phone dialer. The option to place calls over WIFI will then appear in the phone menu. However, some carriers check the type of phone you use or require specific settings in the ROM for it to work. I enabled VoWIFI this way on my device, but it's not working with Vodafone in the Netherlands (at least, not yet).

Appelsap said:
To disable the VoWIFI carrier check, all you have to do is enter *#*#869434#*#* in de phone dialer. The option to place calls over WIFI will then appear in the phone menu. However, some carriers check the type of phone you use or require specific settings in the ROM for it to work. I enabled VoWIFI this way on my device, but it's not working with Vodafone in the Netherlands (at least, not yet).
Click to expand...
Click to collapse
That did the trick, thank you so much !!

orbital247 said:
That did the trick, thank you so much !!
Click to expand...
Click to collapse
Where are you located and what carrier?

gigaflop said:
Where are you located and what carrier?
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Click to collapse
It's in the original post... UK and Three

Works ok on EE using EU ROM, see screenshot

Works ok on Vodafone UK too.

I'm using a Giffgaff and an EE SIM to see which gives better data and the option isn't enabled for Giffgaff (they don't offer it)
So at least in the EU ROM it is up to the carrier with no extra steps the user's end.

I installed EU rom on my Mi 10 ultra and now I no longer have VoWiFi in the settings, and VoLTE is greyed out and can't be clicked! I tried *#*#869434#*#* and got a message that saying VoWIFI is enabled, but it's not working.
Everything was working fine in China rom!!
Update: fixed!

hammody said:
I installed EU rom on my Mi 10 ultra and now I no longer have VoWiFi in the settings, and VoLTE is greyed out and can't be clicked! I tried *#*#869434#*#* and got a message that saying VoWIFI is enabled, but it's not working.
Everything was working fine in China rom!!
Update: fixed!
Click to expand...
Click to collapse
What fixed it?

VoLTE *#*#86583#*#*
VoWIFI *#*#869434#*#*
After dialing these codes make sure the notification says "carrier check disabled" NOT ENABLED.
The trick is you need to restart your phone after enabling them.

hammody said:
VoLTE *#*#86583#*#*
VoWIFI *#*#869434#*#*
After dialing these codes make sure the notification says "carrier check disabled" NOT ENABLED.
The trick is you need to restart your phone after enabling them.
Click to expand...
Click to collapse
Good job. TYVM

it definitely works but call quality was really bad the one time I tried it

Sathelp said:
Works ok on EE using EU ROM, see screenshot
Click to expand...
Click to collapse
I'm UK on EE too... received phone today. Going to start the unlock tonight. Looking online, I note that both the "stable" EU and "weekly" EU appear to have snags - would have thought that the 'stable' would be pretty snag free. Do you recommend the EU ROM, or should I just go ahead with staying on Chinese for a while? I've flashed stuff before on older phones but want to try and keep this one as daily driver where poss, so most 'normal' stuff needs to work pretty much (android auto/vowifi+volte/voice recording/banking/fingerprint).
Would appreciate your input.

If Google pay is important, I mean really important, then stay on stock for now as gpay has an issue, or I should say both stable and weekly seem to have developed a CTS security problem that stops gpay and stops fingerprint banking, normal logins work still though. It should be all good and pass all safetynet tests, so hopefully fixed in next version after Chinese holidays, so around 15 or 16th October as all EU ROMs are based on official ones.
VoLTE and VoWiFI works fine with EU ROM but I am not so sure with the Chinese stock, so one to test.
Call recorder works on all versions really well but you ask about auto, not had any use of it but location history or tracking does not work on their Google framework version but these are fine on the full Google framework set of apps on the EU ROM.
Yes, stable is the most recent so called fully working version with weekly built in top since last stable. Do not switch between each, choose one branch or the other or you may need to wipe your data swapping between the two.
Unlocking does not affect anything but you do need to fully verify your mi account before you start or you will get nowhere. Once done you can start the unlock. The tool will take you to a point where you need to add your mi account and password to the phone to bond the 2 together, then it will start your countdown, 168 hours, one week. Come back after and use the unlock tool again and this time it will unlock, wipe and reboot, so make sure you have a back up or somewhere to get your data back on like your old phone and a copy of mi move. Then you can flash away or stay stock Chinese.
I have attached a copy of my guide to unlock, twrp and ROM flashing, I know you have done some before but it may help you or someone else reading. Oh and one final thing, read as much as you can here and in the Xiaomi.EU forums mi 10 ultra and ROM threads.

Work on Xiaomi Mi 10 Ultra in USA

Sathelp said:
Works ok on EE using EU ROM, see screenshot
Click to expand...
Click to collapse
Sorry to dredge up an old post (I'm EE UK on weekly EU rom).
Can you get SMS to send when on VoWifi, as I'm still getting message send failed (using Pulse SMS)? Calling works, of a sort - quality is poor. Also noticed that sometimes I don't get the VoWifi indicator when out of service area

It sends while on VoWiFI SIM 2 on EE using Mi Message, the stock message app. See screenshot

Hi, I'm having issues with VoWIFI. It never worked on EU Weekly. I see, and enabled the VoWIFI option in the settings, but never works.
VoLTE used to work, but stopped after the last week update (10.12.2020). Since the last weekly update, VoWIFI option disappeared, and VoLTE is greyed out.
I put my SIM in an iPhone and everything was working fine!

I use EU weekly and don't have any issues. My Sky SIM does not but my EE SIM 8n SIM too works a treat. Screenshot attached shows VoWiFI call.
Sometimes the icon dissappears, so I just switch off Wi-fi and back on, service back.

P40 Pro VoLTE or VoWiFi Issue

I am just wondering if anyone facing same issue with VoLTE or VoWiFi. It's not working for me now even the options are enabled in phone settings and it's enabled from Service provider as well. I am confuse and unclear if it's because of GMS installation etc. As it was working fine before. Then i re-installed the firmware .131 using hisuite proxy installed GMS and upgrade to 10.1.0.159. Everything is working fine even 5G but VoLTE not working. Whenever i make call it goes to 3G with poor voice quality.

What carrier are you using?

intfranknet said:
What carrier are you using?
Click to expand...
Click to collapse
It already start working after one day. I don't know what was the issue. May be it take some time to register for the services as I put new SIM card. Now all carriers working fine with VoLTE and VoWiFi
Thanks

volte working ?

Does volte work on this phone straight out of the box, or do you need the eu rom to get it to work?

Need to use the service code to disable the carrier validation.
Sent from my Mi 10 Ultra using Tapatalk

Princevelyn said:
Does volte work on this phone straight out of the box, or do you need the eu rom to get it to work?
Click to expand...
Click to collapse
Yes, it works for me. I am on weekly 20.10.15. Of course i put code into dialer first to activate the VoLTE option.
But VoWiFi doesn't work at all.

Does 5G work?

Mine shows VoWiFI in the status bar but not sure if it's actually been used for a call, see top of screenshot

Sathelp said:
Mine shows VoWiFI in the status bar but not sure if it's actually been used for a call, see top of screenshot
Click to expand...
Click to collapse
How you did it to get this icon? What is your version of MIUI release?
You can check is it working (or not) for callis in the dialer app on the call log. It should show the type of connection next to the data, time and duration of particular call.

Yes, but I rarely use SIM 2.
I am on the EU ROM and it and VoLTE are activated in the ROM with control from the SIM control page. See screenshot.

Sathelp said:
Yes, but I rarely use SIM 2.
I am on the EU ROM and it and VoLTE are activated in the ROM with control from the SIM control page. See screenshot.
Click to expand...
Click to collapse
I understand that you are on EU ROM but what is your version? Stable or weekly? And what is the version number? (20.xx.xx)
For checking if VoWiFi works make a call and check the log in call log for call type, please.
I assume you have Mi 10 Ultra?

I have had both VoLTE and VoWiFI on every version of EU ROM 8 have used since coming from stock Chinese on both A10 and now A11 since launch. I'm on 20.11.05 this week. Both the most recent stable and all weeklies have had it working on the EU ROM.
Since A11, the option to have a preference of voice over Wi-fi or voice over LTE has dropped, you just get the option to turn on voice over LTE, looks like voice over Wi-fi is now preselected.
I understand that I can check my call log but I rarely use SIM 2, so cannot see any use of it on Wi-Fi in my current list and I am not making calls just to provide proof that it works. If 8t says so then I take it that it will. Why would the guys at Xiaomi EU bother to implement it if it doesn't work.
If you are not on the EU ROM, then get it flashed and if you don't like it, go back to stock and relock your bootloader. I bet once your here, I doubt if you will go back.

And although I checked yesterday and saw none, I did make a call and strangely it went out on SIM 2 as a VoWiFI call. See first line screenshot. Second line it never connected but top line shows the call over 4mins on VoWiFI. So it is fully implemented

Sathelp said:
And although I checked yesterday and saw none, I did make a call and strangely it went out on SIM 2 as a VoWiFI call. See first line screenshot. Second line it never connected but top line shows the call over 4mins on VoWiFI. So it is fully implemented
Click to expand...
Click to collapse
Wow. Thanks.
That is strange. Me and other people cannot get it working.
I am on weekly 20.10.15.
And what type of Wi-Fi you have connected to? I mean 2.4GHz or 5GHz...

I am currently on a 5Ghz link at home but do get it out and about on 2.4 GHz too, I've never had an issue, see screenshot.
EDIT, just to show the VoLTE on mine, the second screenshot was taken away from the wi-fi, so shows VoLTE on the EU weekly ROM.

wyflover said:
Need to use the service code to disable the carrier validation.
Click to expand...
Click to collapse
zencooler said:
.... Of course i put code into dialer first to activate the VoLTE option..
Click to expand...
Click to collapse
Hi folks
it seems I cannot find those codes, would you mind sharing a link (or the codes ) ? Are those two the same codes or different ones ?
I appreciate your help, thanks,
Axel

s3axel said:
Hi folks
it seems I cannot find those codes, would you mind sharing a link (or the codes ) ? Are those two the same codes or different ones ?
I appreciate your help, thanks,
Axel
Click to expand...
Click to collapse
For VoWiFi you need to put code *#*#869434#*#* and after restart the phone set on VoWiFi in carrier configuration (tap on SIM card).