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[Guide]Enabling VoLTE on stock ROM (Calls and SMS)

Hi all.
I just want to post a guide for people wondering how to enable VoLTE in unsupported countries. Apparently, Xiaomi only enable VoLTE for SEA countries etc. and Japan (Where I'm staying) is not supported.
So, I have been having problems receiving SMS and calling other numbers. After reading this blog post, I have solved that problem and maybe I can help others solving this problem. This is the procedure written in the blog post in English.
1. Setting APN (Might not be applicable for other countries)
-----------------
for Au user with VoLTE enabled sim, create a new APN and set it as below
・NAME:ims
・APN:ims
・MCC:440
・MNC:51
・TYPE:ims
for DoCoMo user with VoLTE enabled sim, create a new APN and set it as below
・NAME:ims
・APN:ims
・TYPE:ims
・APN protocol:IPv4v6
2. Go to dial and dial *#*#86583#*#* . It should show carrier check disabled or something along the lines.
3. If the phone does not have a signal after step 2. reboot the device and it should connect after that.
Hope this will help anyone who is having trouble enabling VoLTE.

thanks man . *#*#86583#*#* did worked for me in Sri lanka

Dilesh Perera said:
thanks man . *#*#86583#*#* did worked for me in Sri lanka
Click to expand...
Click to collapse
I'm glad I was able to help

its a pity there's not such a short code to enable the VoWifi in the same way
EDIT:
Turns out setprop persist.dbg.wfc_avail_ovr 1 enables the switch, but the service still shows as unavailable.
using the build.prop changes I came up with for this https://forum.xda-developers.com/oneplus-5/themes/magisk-volte-enabler-t3649647
enables UT interface.

Volte Restore
Run the below code in your dialer app manually. You should see a message stating "Volte Carrier check disable" else run the code again.
After 30 seconds your volte network should be retored. Pull down the notification bar to check for the volte symbol.
*#*#86583#*#*
Cheers!!

Hi
Thanks for this topic.
I have a problem : my poco F1 (MIUI Global 10.3.5.0) says it is enabled only for SIM1.
But as I use a µSD card (which has to be plugged instead of SIM1) I only have SIM2 place to put my SIM.
So I only have SIM2, no SIM1, and my poco says "only for SIM1"...... WTF ?!!
Someone has an idea for having VoLTE (and VoWiFi) on SIM2 ???
Thanks !

volte and wifi calliing

hi was wondering if there is any way how to enable volte and wifi calling? im using tmobile i dont see volte anywhere without root if possible for now?
Thanks

raven213 said:
hi was wondering if there is any way how to enable volte and wifi calling? im using tmobile i dont see volte anywhere without root if possible for now?
Thanks
Click to expand...
Click to collapse
VOLTE should work out of the box.

raven213 said:
hi was wondering if there is any way how to enable volte and wifi calling? im using tmobile i dont see volte anywhere without root if possible for now?
Thanks
Click to expand...
Click to collapse
Have you tried, *#*#86583#*#, to see if that works for you?

jcsww said:
Have you tried, *#*#86583#*#, to see if that works for you?
Click to expand...
Click to collapse
yeah i just dont see volte on my phone lol plus when i make a call it changes to 4g

raven213 said:
yeah i just dont see volte on my phone lol plus when i make a call it changes to 4g
Click to expand...
Click to collapse
4G is technically LTE. The Xiaomi firmware doesn't seem to have an LTE icon, at least not that I have seen. 4G and 4G+ are LTE and LTE-A.

jcsww said:
4G is technically LTE. The Xiaomi firmware doesn't seem to have an LTE icon, at least not that I have seen. 4G and 4G+ are LTE and LTE-A.
Click to expand...
Click to collapse
thanks for the info

After the *#*#86583#*#, try going into Mobile & Networks, and select your SIM card. There should be a VoLTE enabled option now. This option didn't show up for me until I did that and then I had to turn it on.
There's now a tiny VoLTE icon in the notification bar and when I'm on a call, it stays there.

Try code *#*#869434*#*# to disable VoWIFI check. And check if it working on T-Mobile.
I don't have Tmobile to check it.

mohanparvatham said:
Try code *#*#869434*#*# to disable VoWIFI check. And check if it working on T-Mobile.
I don't have Tmobile to check it.
Click to expand...
Click to collapse
No, VoWifi doesn't work on t mobile

What ROM's have people tried for WiFi Calling? Does the OP refer to T-Mobile in the UK/EU or USA? The Global Stable seems to have some less features compared to the Chinese Stable. I had Advanced Messaging working in the default text app when I was on Chinese Stable by doing nothing but it does not seem to work on the Global Stable.

got volte working on tmobile US just not wifi calling but its fine

raven213 said:
got volte working on tmobile US just not wifi calling but its fine
Click to expand...
Click to collapse
Which ROM is your device using? I really want to flash my green one back to the Chinese Stable. Global Stable just isn't as good in my opinion.

jcsww said:
Which ROM is your device using? I really want to flash my green one back to the Chinese Stable. Global Stable just isn't as good in my opinion.
Click to expand...
Click to collapse
Eu global the lastest one 10.2.2.0

Ever find a solution to this? I am on MIUI Global 10.3 (Stable) and am able to turn off Mobile data( T Mobile is my carrier in U.S.) and with my WiFi on the device i can still make and receive phone calls. In this configuration i obviously still see my WiFi symbol in the Notification bar as well as the VoLTE symbol. Don't know if this will help you at all, but it is some stuff i have noticed recently when i was trying to figure out why T-Mobile apps dont work on my Mi Mix 3.
With WiFi turned off and Mobile Data turned on i am able to make phone calls(obviously) with VoLTE and am able to see the LTE+ symbol in the Notification bar as well.
If i go to About Phone --> Tap "Internal Storage" 4 time(brings you to the Testing Menu) and looking into the Phone Info i see the following...
Set Preferred Network Type: LTE/TD-SCDMA/UMTS
Mobile Radio Power: On
VoLTE Provisioned: Off
Video Calling Provisioned: Off
WiFi Calling Provisioned: Off
EAB/Presence Provisioned: Off
When i bring this menu up on my previous phone(LG G7 ThinQ) i see that the Preferred Network type was different...so i changed my Mi Mix 3 just to match to see how it would change
My LG G7(without a SIM inserted) shows the following
Set Preferred Network Type: LTE/UMTS auto (PRL)
Mobile Radio Power: On
VoLTE Provisioned: On
Video Calling Provisioned: On
WiFi Calling Provisioned: On
EAB/Presence Provisioned: Off
Changing the network type on my Mi Mix 3 didnt do much, however when i changed it LTE/CDMA/UMTS auto(PRL) the VoLTE Provisioned and Video Calling Provisioned both switched to "On".
I dont quite understand this so for the most part i have just left it to match my LG's setting since i can change the network type back to LTE/UMTS auto(PRL) after and the settings stay set to "On"
Made a few test phone calls after with WiFi on and off, everything seems to work just fine regardless of what the phone displays.

[email protected] said:
Ever find a solution to this? I am on MIUI Global 10.3 (Stable) and am able to turn off Mobile data( T Mobile is my carrier in U.S.) and with my WiFi on the device i can still make and receive phone calls. In this configuration i obviously still see my WiFi symbol in the Notification bar as well as the VoLTE symbol. Don't know if this will help you at all, but it is some stuff i have noticed recently when i was trying to figure out why T-Mobile apps dont work on my Mi Mix 3.
With WiFi turned off and Mobile Data turned on i am able to make phone calls(obviously) with VoLTE and am able to see the LTE+ symbol in the Notification bar as well.
If i go to About Phone --> Tap "Internal Storage" 4 time(brings you to the Testing Menu) and looking into the Phone Info i see the following...
Set Preferred Network Type: LTE/TD-SCDMA/UMTS
Mobile Radio Power: On
VoLTE Provisioned: Off
Video Calling Provisioned: Off
WiFi Calling Provisioned: Off
EAB/Presence Provisioned: Off
When i bring this menu up on my previous phone(LG G7 ThinQ) i see that the Preferred Network type was different...so i changed my Mi Mix 3 just to match to see how it would change
My LG G7(without a SIM inserted) shows the following
Set Preferred Network Type: LTE/UMTS auto (PRL)
Mobile Radio Power: On
VoLTE Provisioned: On
Video Calling Provisioned: On
WiFi Calling Provisioned: On
EAB/Presence Provisioned: Off
Changing the network type on my Mi Mix 3 didnt do much, however when i changed it LTE/CDMA/UMTS auto(PRL) the VoLTE Provisioned and Video Calling Provisioned both switched to "On".
I dont quite understand this so for the most part i have just left it to match my LG's setting since i can change the network type back to LTE/UMTS auto(PRL) after and the settings stay set to "On"
Made a few test phone calls after with WiFi on and off, everything seems to work just fine regardless of what the phone displays.
Click to expand...
Click to collapse
Put the device in airplane mode, then turn on WiFi. Can you make calls? I can't! Turning on WiFi and enabling WiFi Calling doesn't mean the calls are going over WiFi. Especially if you are still seeing VoLTE or any time of mobile network connection.
Edit: Go down to the very bottom, hit more, hit IMS status, and see what it says.

Yeah I looked at the IMIS before, voice over wifi has always(I assume) said not unavailable

[email protected] said:
Yeah I looked at the IMIS before, voice over wifi has always(I assume) said not unavailable
Click to expand...
Click to collapse
No access to the IMS settimgs is more than likely why we can't get it working. We cam't see the settings to even compare them to what they should be.

I am on MIUI Global 10.3 (Stable) / Chinese Device / T-Mobile Germany.
VoWiFi as well as VoLTE are working on my device, however you need root access to enable the VoWiFi profile.
Once it is working you will see the WiFi calling icon in the status bar.
I was following this guide to enable WiFi calling on the Mi Mix 3:
https://forum.xda-developers.com/poco-f1/how-to/guide-activate-vowifi-wlan-call-t3871263
I don't know if the mentioned profile will work in other countries as well but maybe someone with more insight can shed some light into this.
I remember that VoLTE was working out of the box, you just have to disable the carrier check with the USSD code to make it available in settings.
VoWiFi can be enabled via USSD code as well, however even after changing the setting to enabled and preferred WiFi calling it does not register without the profile change.
VoLTE: *#*#86583#*#*
VoWiFi: *#*#869434#*#*
I had to redo the profile change after each upgrade with TWRP, since the firmware partitions get updated as well.
I hope this will help. :fingers-crossed:

I have Mix 3 with U.S T-Mobile service. After disabling the VoWiFi check with *#*#869434#*#*, the option for WiFi calling check box appears under the T-Mobile SIM section, but WiFi calling is not working when tested under airplane mode with WiFi enabled.

Vowifi works fine on MTS (Russia). All you need:
1. Activate vowifi service from the operator
2. Disable service check by command: *#*#869434#*#*
3. Create folder into: /system_root/system/priv-app/MBNLoader
4. Copy into this folder APK: MBNLoader.apk (View attachment MBNLoader.apk
5. Give right privileges: -rw-r--r--
6. Reboot phone
7. Install from play market QuickshortcutMaker: https://play.google.com/store/apps/details?id=com.sika524.android.quickshortcut
8. Open it and go to tab apps
9. Find Modem Config
10. Open it (tap) and you will see a lot of MCFG Modem configs.
11. Try one by one to start vowifi working
12. Enjoy!
Screenshots:

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.

no volte option

I got the phone today, but I there is no volte option in setting. I had volte options in my oneplus 5t. Is there secret codes to force unable the option? I am on three UK sim.

Other way round for me.
On BT Mobile (and EE) UK I could never get 4G calling on my old XZ2. Xperia5 II plugged in sim and it was a notifications bar quick button and available in settings straight away.
Comes under:
Settings -> Network & Internet -> Mobile > Advanced > Calling

I have made few calls and it seem they were made over 4G because status bar icon didn't change from 4G to 3G so I guess I do have VOLTE enabled but I don't have option in setting.
Further more I checked the info section and the volte provision option is enabled and grayed out. I don't understand why I don't have option for volte but it works for don't care much about it now.
Edit = WiFi calling option is available in setting and it works too.

I have 4G Calling option available for my O2 sim and VoLTE for my Telekom sim. WiFi calling option is also there.

I only get VOLTE option on my UK 3 sim. On my Spanish O2 SIM it's not available (though I know for sure the service is enabled but only for certain devices)

enekomh said:
I only get VOLTE option on my UK 3 sim. On my Spanish O2 SIM it's not available (though I know for sure the service is enabled but only for certain devices)
Click to expand...
Click to collapse
Weird, I am using UK 3 SIM as well and I don't get option for volte but I am able to make calls over 4G. Don't know why is option hidden.

It is activated by standard if technically possible. There is no reason to deactivate it, so no switch is needed.

VoLTE/ Wifi calling are enabled by the operator. Maybe your operator has not certified Xperia 5 ii yet.
Check with your operator

4G Calling is actually VoLTE, so you have it and you are using it already as you stated above. No worries! ?

rideti.me said:
Other way round for me.
On BT Mobile (and EE) UK I could never get 4G calling on my old XZ2. Xperia5 II plugged in sim and it was a notifications bar quick button and available in settings straight away.
Comes under:
Settings -> Network & Internet -> Mobile > Advanced > Calling
Click to expand...
Click to collapse
Hi. I asked in another thread about WiFi calling working for the Xperia 5 II on BT Mobile. If 4G calling works then hopefully WiFi calling too?.
Can you confirm? Thx.

wazzaworld said:
Hi. I asked in another thread about WiFi calling working for the Xperia 5 II on BT Mobile. If 4G calling works then hopefully WiFi calling too?.
Can you confirm? Thx.
Click to expand...
Click to collapse
I should have clarified my previous post. The selectable option (quick button and menu) is to turn Wifi Calling on/off. VOLTE/4G calling is just fixed as provisioned. You can see this in the service menu (*#*#4636#*#*)
The service providers are clueless when you ask if they do or don't support Wifi/VOLTE calling.
So yes both available and working on BT Mobile.

rideti.me said:
So yes both available and working on BT Mobile.
Click to expand...
Click to collapse
That's awesome thank you. You might have just swung a sale for Sony. You should be on commission :laugh:.

Activating VOLTE on unlock V600TM(Tmobile)without rooting or installing whatever

I activated my VOLTE for my unlock TMObile phone V600TM running on the latest android 12 version 30f by just the below commands
enter dial, type *#546368#*600#
Field test
IMS setting
Test
PreferenceOperator put OPEN
Preference country put MY (according to your country example Indonesia would be IND or America with be the US and so on)
Tick the 2 options below
✓ Support Volte on Command
✓ Volte setting enabled
restart ims process
Once done go to the mobile network option and add the below APN(not sure if this APN is universal but it works for me in Malaysia in all the carriers so I guess you can give it a try) don't delete the existing APN
APN: ims
APN name: ims
APN type: ims
after that restart your phone and you will see the VOLTE sign appearing next to the wifi symbol and so on. Make sure your 4G signal is strong enough if not it won't appear.
Also, I notice when I use the 4636 commands to check it still says IMS is not registered and Volte is not provision but I can use Volte maybe this is the bypass as I tested the call and so on already just make sure your Sim card supports or is Volte activated as well.
Also the Volte setting wont appear in Mobile network but it will work with the VOLTE icon appearing

My TMObile V600TM phone is network locked.
How to unlock it? if yes could you please point me out?
thanks

colincsf said:
I activated my VOLTE for my unlock TMObile phone V600TM running on the latest android 12 version 30f by just the below commands
enter dial, type *#546368#*600#
Field test
IMS setting
Test
PreferenceOperator put OPEN
Preference country put MY (according to your country example Indonesia would be IND or America with be the US and so on)
Tick the 2 options below
✓ Support Volte on Command
✓ Volte setting enabled
restart ims process
Once done go to the mobile network option and add the below APN(not sure if this APN is universal but it works for me in Malaysia in all the carriers so I guess you can give it a try) don't delete the existing APN
APN: ims
APN name: ims
APN type: ims
after that restart your phone and you will see the VOLTE sign appearing next to the wifi symbol and so on. Make sure your 4G signal is strong enough if not it won't appear.
Also, I notice when I use the 4636 commands to check it still says IMS is not registered and Volte is not provision but I can use Volte maybe this is the bypass as I tested the call and so on already just make sure your Sim card supports or is Volte activated as well.
Also the Volte setting wont appear in Mobile network but it will work with the VOLTE icon appearing
Click to expand...
Click to collapse
it worrking by Viettel - VietNam. Preference country: VN. thanks for share

Hiii
When I try to enter to IMS settings, the screen shows LG IMS but nothing more. My phone is network unlocked.

fercas said:
Hiii
When I try to enter to IMS settings, the screen shows LG IMS but nothing more. My phone is network unlocked.
Click to expand...
Click to collapse
Lg phones g8x, g8, v60, velvet Volte enable for all carriers, unlisted countries also
I will try to keep this post as small as possible. This will enable Volte for Phone ranging from Lg g8x, g8 and V60 without root or modifying the system files. Many have posted ways to get it, Iam only trying to help out the small bits missing...
forum.xda-developers.com
thanks to the OP for this thread, really pushing for these amazing devices to live on, you can follow my first steps to get the IMS option to open up.

Tried it on V600TM30C in Greece (GR) Cosmote and worked! Thank you! I have tried other ways (rooting,etc) but none worked so far.
I have also tried it on V600EA10 but I couldn't enter IMS settings menu and the johndaniel tutorial didn't seem to work, so I restored my back up to V600TM30C. I still need to find a way to have 5G.

anyone tried Lg v60 L-51a ???