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HINT - How to activate VoLTE and VoWIFi without sys modification on MIUI v10

Hello all,
Just for your awareness, there's a way to enable both VoLTE and VoWIFI on MIUI V10 roms (xiaomi.eu included!).
Use these codes in the dialer:
VoLTE *#*#86583#*#*
VoWIFI *#*#869434#*#*
I'm attaching a proof it works from the latest xiaomi.eu beta present on my Mix2s (polish carrier nju mobile/orange)

LuHash said:
Hello all,
Just for your awareness, there's a way to enable both VoLTE and VoWIFI on MIUI V10 roms (xiaomi.eu included!).
Use these codes in the dialer:
VoLTE *#*#86583#*#*
VoWIFI *#*#869434#*#*
I'm attaching a proof it works from the latest xiaomi.eu beta present on my Mix2s (polish carrier nju mobile/orange)
Click to expand...
Click to collapse
Thank you working for me!

LuHash said:
Hello all,
Just for your awareness, there's a way to enable both VoLTE and VoWIFI on MIUI V10 roms (xiaomi.eu included!).
Use these codes in the dialer:
VoLTE *#*#86583#*#*
VoWIFI *#*#869434#*#*
I'm attaching a proof it works from the latest xiaomi.eu beta present on my Mix2s (polish carrier nju mobile/orange)
Click to expand...
Click to collapse
I don't see the VoWiFi signal in your screenshot, only the VoLTE. Has Xiaomi announced they will support VoWiFi now? I was always able to turn these settings on, but the only one that works is the VoLTE. The WiFi is not supported on the Mix 2s as far as I know with no plans to enable this feature. Even with system modifications, I was able to get the radios toggled on in the *#*#4636#*#* menu, but still none of the radios would actually connect as a VoWiFi call. Even by enabling different radios through QPST didn't enable VoWiFi, so I'm a bit weary of the last one.
If you can, please put your phone in airplane mode, then connect to WiFi only and attempt to make a call. If it works, then VoWiFi is truly enabled. If not, then you just have a fancy setting that doesn't work. Can you please try and report back. Because if this is true, it would eliminate a huge issue of reception in my house, and I will hesitantly head back over to my windows machine to toggle my radios back.

I was going to post the same thing. It does not actually allow you to call over WiFi, at least not in t mobile.

This doesnt work. Airplane mode with WiFi on does not allow calls to dial out.
However, With a Google Fi sim, I can wifi call using the hangouts dialer using the above settings (Airplane mode + WiFi on)

JonMS said:
This doesnt work. Airplane mode with WiFi on does not allow calls to dial out.
However, With a Google Fi sim, I can wifi call using the hangouts dialer using the above settings (Airplane mode + WiFi on)
Click to expand...
Click to collapse
Yeah, I can use Hangouts as well just using my Hangouts dialer, not on project fi. I have it synched to an old Google voice number. But that is using a true VoIP of sorts, so makes sense. That not being my primary number though, and I'm too lazy to switch...
Sent from my Mi MIX 2S using Tapatalk

Being with Vodafone, both VoLTE and VoWifi working. Cheers pal

@All claiming not working - you're of course right, that's due to the fact there's no profile in the OS for the providers mentioned

It works on Movistar Colombia

i just have volte icon when i disable with that code.
Strange no?

LuHash said:
Hello all,
Just for your awareness, there's a way to enable both VoLTE and VoWIFI on MIUI V10 roms (xiaomi.eu included!).
Use these codes in the dialer:
VoLTE *#*#86583#*#*
VoWIFI *#*#869434#*#*
I'm attaching a proof it works from the latest xiaomi.eu beta present on my Mix2s (polish carrier nju mobile/orange)
Click to expand...
Click to collapse
Hi Luhash,
is VoWiFi still working for you on nju/orange?
i was just thinking of switching to orange Flex, and read this -> https://www.telepolis.pl/wiadomosci/sprzet/orange-nju-mobile-xiaomi-volte-wifi-calling-vowifi

dj69holland said:
Hi Luhash,
is VoWiFi still working for you on nju/orange?
i was just thinking of switching to orange Flex, and read this -> https://www.telepolis.pl/wiadomosci/sprzet/orange-nju-mobile-xiaomi-volte-wifi-calling-vowifi
Click to expand...
Click to collapse
Oi,is working good on MIUI 11 too.
Sent from my [device_name] using XDA-Developers Legacy app

VoWifi is working on the mix2s! But you need to modify some system files

XDRdaniel said:
VoWifi is working on the mix2s! But you need to modify some system files
Click to expand...
Click to collapse
Can you elaborate? Is there any hope for WiFi calling on Mi9 SE? (MIUI Global 10.3.9 | )
This is a must-have feature for me, so I'll return the phone if there is no way to fix it.

VideoVeteran said:
Can you elaborate? Is there any hope for WiFi calling on Mi9 SE? (MIUI Global 10.3.9 | )
This is a must-have feature for me, so I'll return the phone if there is no way to fix it.
Click to expand...
Click to collapse
What network are you on, and country?

XDRdaniel said:
What network are you on, and country?
Click to expand...
Click to collapse
T-Mobile, USA.

Hi all!
Has anyone had any luck with the Mix 2S on 3 UK? Tried everything I found but still no VoWifi...
Thanks!

Doesn't work
I am in french operator bouygue telecom and it doesn't work whith code enter in miui.
Any idea ?
i am in xiaomi.eu weekly 21.0.7 (MIUI 11/Android 10)

Would this work for Verizon ?

Would this work for Verizon ?

Asus Zenfone 6Z wifi calling activation

Here are the steps to activate Jio wifi calling on Asus 6Z. You need to enter code *#*#3642623344#*#* and this will activate special menu under Network settings. You need to deactivate Volte/Enhanced calling switch first then activate wifi calling and after getting wifi calling symbol again reactivate Volte switch. You need to repeat this after every restart of phone.
Link to video-
https://youtu.be/GfUqsbIr058

Why is there no prompt when I type and nothing appears on the phone interface?

You should go in network settings amd check change

kanghuihui said:
Why is there no prompt when I type and nothing appears on the phone interface?
Click to expand...
Click to collapse
That's how these cheat code works. It does the job in background. After entering, it should just go back to dialer without having press to call button. Then, check in settings.

There is wifi call in the settings, but there is no icon in the status bar after I turn it on. I follow the video

kanghuihui said:
There is wifi call in the settings, but there is no icon in the status bar after I turn it on. I follow the video
Click to expand...
Click to collapse
what is your pocation and handset model?

Model is zenfone6，Bought in Hong Kong

kanghuihui said:
Model is zenfone6，Bought in Hong Kong
Click to expand...
Click to collapse
Does your operator support wifi calling? In India this method works perfectly

There are Wifi calling functions in the settings, and the operations described in the videos and posts are also followed. There is no wifi call icon, and there is no attempt to call. Is it not supported in the Hong Kong version? Although this function is available, it is invalid.

Wifi calling already enabled on this Android Q, no need to d this..I am already using it
dial *#*#4636#*#* you will easily get WiFi enabled service

Does it really work though? After doing this, it refuses to make a call if you say wifi calling only which makes me think it still needs the mobile carrier to have a signal for calls.
Service is t-mobile fyi.

It is working flawlessly in India on Jio network. I have demonstrated in Video also

enkryptik said:
Does it really work though? After doing this, it refuses to make a call if you say wifi calling only which makes me think it still needs the mobile carrier to have a signal for calls.
Service is t-mobile fyi.
Click to expand...
Click to collapse
It only works in India (maybe some other places?). They don't seem to care about the US.
According to one of the mods on the Zenfone forum:
"When it comes to features like VoWiFi, VoLTE and so on. It's about testing, paying fees and signing contracts."
I don't think they care enough about the US (they don't really push the phone here) to pay the money. Don't hold your breath. Probably need to go custom ROM.

Custom ROMs didn't allow it to work on TMobile either. Glad some can actually use it though.

Volte doesn't work in the USA

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?
Click to expand...
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.

VoLTE not working

Hi, I had Poco F1 before with working VoLTE, so I know that my carrier and current Sim card is supporting it. All I had to do on the F1 was typing in that code *#*#86583#*#* and activating the new volte setting.
I tried that with the X3 but it's not working. Whenever I receive/make a phone call my connection will switch from 4G to 3G.
Is there a workaround or is it a hardware limitation? I could imagine because the X3 just has an entry level SOC that the modem has some artificial restrictions to differentiate from the flagship SOC (845/865).

Did you get a volte carrier check disabled message after dialling that?
For me both volte and vowifi are working fine

Yes I got that. Are you telling the phone your real location or do I have to chose India or china? I remember with my Poco F1 I had to chose India to get features like call recording...btw I'm in Australia.

Changing regions
Anyone know if I do a factory reset and change to a different region like Europe will that make the phone operate on different Verizon bands possibly allowing me to get service? Just a thought ?

ankerede said:
Yes I got that. Are you telling the phone your real location or do I have to chose India or china? I remember with my Poco F1 I had to chose India to get features like call recording...btw I'm in Australia.
Click to expand...
Click to collapse
If you got the VoLTE was disabled message after entering the code, go to SIM settings and there will show the option to activate VoLTE. If not appears, try to enter the code again and check the SIM settings.
---------- Post added at 05:38 AM ---------- Previous post was at 05:30 AM ----------
Glock45 said:
Anyone know if I do a factory reset and change to a different region like Europe will that make the phone operate on different Verizon bands possibly allowing me to get service? Just a thought ?
Click to expand...
Click to collapse
I think using different bands it's more about regional ROMs construction (Global, India, Europe etc) than changing region in ROM settings. Alternative, you can flash a different regional ROM using MiFlash and see if it helps with your problem.

After entering that code I get the switch, to turn on volte, but that doesn't change anything.

ankerede said:
After entering that code I get the switch, to turn on volte, but that doesn't change anything.
Click to expand...
Click to collapse
Can't you see the specific VoLTE symbol near mobile signal in the upper right corner of the screen? If you can't see it, you can try to make a phone call and see if the google dialer shows it's a VoLTE call (or check the dialer history calls if you use Xiaomi dialer....you'll see there if it was a VoLTE call or not).

Same here with my Poco x3 NFC global I am on Vodafone UK my carrier support volte and vofi but I can't enable it , I have no settings . What I found when I flash custom ROMs the volte works , the sound in voice calls is super crisp and I got the icon always there vote on sim and vofi on WiFi . I need an option or a menu or a trick to show that option in stock ROM to enable it .
I remember back in the days when I had OnePlus I had to go in the ingineer menu to tick on a toggle " enable volte" and "enable vofi"
And later on the OnePlus 7t pro I had to install an apk to force that toggle so I can enable it .

On my Mi Mix 2s it shows volte when enabled. This one no. Poco needs to fix this before a number of users get dumped for lack of volte.

Aburel18 said:
Same here with my Poco x3 NFC global I am on Vodafone UK my carrier support volte and vofi but I can't enable it , I have no settings . What I found when I flash custom ROMs the volte works , the sound in voice calls is super crisp and I got the icon always there vote on sim and vofi on WiFi . I need an option or a menu or a trick to show that option in stock ROM to enable it .
I remember back in the days when I had OnePlus I had to go in the ingineer menu to tick on a toggle " enable volte" and "enable vofi"
And later on the OnePlus 7t pro I had to install an apk to force that toggle so I can enable it .
Click to expand...
Click to collapse
Did you try activate it using this codes in Dialer? VoLTE: *#*#86583#*#* and VoWIFI: *#*#869434#*#*. After that go to your SIM settings and you'll get the option to activate VoLTE and VoWiFi.

I have tried those and I left it on enabled both of them . Still not working

Alin45 said:
If you got the VoLTE was disabled message after entering the code, go to SIM settings and there will show the option to activate VoLTE. If not appears, try to enter the code again and check the SIM settings.
---------- Post added at 05:38 AM ---------- Previous post was at 05:30 AM ----------
I think using different bands it's more about regional ROMs construction (Global, India, Europe etc) than changing region in ROM settings. Alternative, you can flash a different regional ROM using MiFlash and see if it helps with your problem.
Click to expand...
Click to collapse
Thanks only problem is w/o being able to get cell service I can't unlock, any way to flash different rom not being unlocked?

Glock45 said:
Thanks only problem is w/o being able to get cell service I can't unlock, any way to flash different rom not being unlocked?
Click to expand...
Click to collapse
If you have an locked bootloader I'm not aware about a method to flash another regional ROM. I had read that many Poco X3 users have problems getting mobile data connection with Verizon (especially in USA).

Hello anyone has managed to operate the volte on both sim cards simultaneously on his POCO X3? thank you

Alin45 said:
If you have an locked bootloader I'm not aware about a method to flash another regional ROM. I had read that many Poco X3 users have problems getting mobile data connection with Verizon (especially in USA).
Click to expand...
Click to collapse
I was able to get 4g working good signal 4-5 bars long enough to link it to my MI account try to unlock it this Sunday is weird though the signal will stay strong then disconnect then come back and can't add it into any networks via their web site after I unlock it I'll take it to the diff stores try get them to activate it I'll let ya know how it turns out ?

I have the same problem with bouygue telecom, Volte is activated but doesn't work.

Volte also doesnt Work in Germany for reseller Sim cards of German Telekom and Telefonica ...

Alin45 said:
If you have an locked bootloader I'm not aware about a method to flash another regional ROM. I had read that many Poco X3 users have problems getting mobile data connection with Verizon (especially in USA).
Click to expand...
Click to collapse
Got my bootloader unlocked I'll try flash another regional rom

Same here in Italy, no volte, it switch ti 3g. With my previous 8t all was fine

I am using the stock room and used the dial codes got the settings but everytime I tried to make a call it wouldn't work I went to setting all specs and tap internal storage 5 times then choose the sim you are using then you have to turn the top switch off then back on. This is how I got mine working I also have extended my storage by using root explorer and cut everything under sd card and move to storage.