Question Mi 11 ultra Chinese version not supporting Volte? - Xiaomi Mi 11 Ultra

I tried enabling volte through dialler it worked for some time but suddenly I woke up this morning and Volte disappeared . Please help

The screenshot shows wifi enabled, so what happens when you disable wifi and make a call?

Volte disappeared after some time

ok, but what actually happens when you make a call when wifi is not enabled?
Mine doesn't display the VoLTE logo but works.

Mine switches to 3g when Im on call

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install this:

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WiFi calling?

saw a YouTube video today guy was using Google fi with mm2. isn't google fi for WiFi phones?
can anyone confirm?
Hello, I did not have the Wifi Call Option in the network setup. My provider supports Wifi calling. I have MIUI 10.2 but unlocked and rooted with Magisk. In Magisk I have installed VoEnabler v1.4. Now I have the option Wifi call and enabled it. However using the button below for configuring Wifi call precedence, I get a crash log. Provider settings are disabled and not possible to set. Using *#*#4636#*#* I see the VoLTE enabled, but no option about Wifi Call.

Xiaomi mi 9T Pro - Problems receiving calls while on 4G

Hello!
I hope someone can help me with this "little" problem that I'm experimenting with my Xiaomi mi 9T Pro running MIUI Global 10.3.3.0 (Stock) I checked everything before buying and the phone is fully compatible with my carrier (I'm from Venezuela), however, I noticed that when the phone is on 4G it switches to 3G/H/H+ in order to make/receive calls (which is pretty normal since my carrier does not support VoLTE). The problem comes when there is an incoming call, it should switch automatically to 3G/H/H+ BUT it does not happen all the time, in fact, I can say that it only happens 25% of the time when I was testing, of course, when it does not happen there is no way to receive the incoming call.
So far I tried:
- Forcing the phone to stay on 3G (everything works great)
- Testing the different network options (it switches from 4G to 3G but not always as it should)
- Switching from SIM slot 1 to slot 2
- At the moment the preferred network type is LTE/TD-SCDMA/UMTS (default)
Could it be a software issue? or could it be related to my carrier? I haven't tried using a SIM card from another carrier.
After all, I bought a PHONE that does not behave like an actual phone all the time, so, I hope someone can help me with this.
Thanks in advance.
Thank you, I almost thought I was the only one.
I bought my Xiaomi mi 9T Pro running MIUI Global 10.3.3.0 (Stock) a week ago and I have the same symptoms like you.
Im on A1 Network in Austria running default network settings and I realized after hours I couldn't make calls (and obviously did't receive any).
This is the first phone I had this network problems, and I am on A1 network for 20 years with different phones....
I hope someone can share some light why this happens and what are the best settings for European (Austrian) A1 network.
Trying to switch to LTE/UMTS, but that setting is always reset to the default above after reboot.
As its also my work phone it would be very bad not recognizing for hours that I'm not reachable...
Thank you !
A1 supports VoLTE, try to enable it on your phone, I have no issues running a dual SIM config with A1 and 3 .....
pietropizzi said:
Thank you, I almost thought I was the only one.
I bought my Xiaomi mi 9T Pro running MIUI Global 10.3.3.0 (Stock) a week ago and I have the same symptoms like you.
Im on A1 Network in Austria running default network settings and I realized after hours I couldn't make calls (and obviously did't receive any).
This is the first phone I had this network problems, and I am on A1 network for 20 years with different phones....
I hope someone can share some light why this happens and what are the best settings for European (Austrian) A1 network.
Trying to switch to LTE/UMTS, but that setting is always reset to the default above after reboot.
As its also my work phone it would be very bad not recognizing for hours that I'm not reachable...
Thank you !
Click to expand...
Click to collapse
Hi! It feels better knowing that I'm not alone.
The fact is that I can actually make calls (it take from 3 to 5 seconds switching from 4G to 3G/H), the problem comes when there is an incoming call, sometimes it works (it switches to 3G/H and when the call is ended, it switches back to 4G) but most it does not. I just tried LTE/UMTS and it does work but not for long, I can see that it happens and sometimes it does not. I found a "solution" which involves forcing to 3G/H but it's not the point, there should be a real solution. At this moment, I haven't found a correct network configuration, all the ones that I've tried just have worked for me for some time, and then the problem is back without even rebooting the phone. Could it be caused by a faulty SIM or it's just a network/carrier issue? I don't want to think that it's a hardware issue.
error23 said:
A1 supports VoLTE, try to enable it on your phone, I have no issues running a dual SIM config with A1 and 3 .....
Click to expand...
Click to collapse
Whats your ROM Version ?
I alreaddy tried to enable VoLTE, I can switch it on and the VoLTE Symbol appears.
The problem is - I have no caller ID. I don't even see the phone number when someone calls me ("unbekannter Anrufer" - "unknown caller")
That's not conveniant, so as soon as I switched OFF VoLTE caller recognition was enabled again.
Is VoWIFI working at you with A1 ? I can enable it but I don't get the symbot at home in my WIFI network.
So for now I see two options:
- the correct (stable) network configuration for Austria that persist in the phone configuration
- enabling VoLTE but with a solution for a working caller ID
I finally got found the solution
Problem is the notification settings.
This was somehow reset after the update to mui 11.
To fix the issue:
1. Go to settings
2. Click notification
3. Click the notification badges (3rd icon)
4. Find the "phone" icon
5. Enable the show notification
6. Exit to settings and test
Having same problem
Can someone help me I am from Malta and have Xiaomi mi9t pro and from last night stopped receiving calls and incoming . Tried with sim 1 and it worked but it happened again . I tried the notification settings but still the same problem .
I had trouble not receiving calls also...
After looking here, and also on YouTube, I started going through my phone again. I too was not getting my calls a lot, but I have only had my phone maybe 2 weeks, so there's not much on it yet. One thing I am always adding is themes. The theme feature is it's own pre installed app as I'm sure we've all seen. Different one's have been doing/blocking certain features at times on my phone. My husband's calls were being sent to voicemail, and some other important calls. I noticed the other day when I tried a new theme it locked me out of my phone with no preface to get back to the lock screen. I had to take a picture and select send to get back to the lock screen. Remembering this, I decided to go back to the original developer theme for the phone. My phone now rings. Original developer mode also controls the call feature, not just the theme, which I did not know or read until now. Going back to it I believe kind of reset my configuration. I would say give this a try for sure. Hope it helps someone else I love my phone and didn't want to lose it. FYI, I am on TMobile network in the USA.
Hi!
I have a very similar problem on a xiaomi redmi note 8t. I tried various settings, but failed. This is annoying because the phone is relatively new. I think it is a hardware problem.
Saulor said:
Hello!
I hope someone can help me with this "little" problem that I'm experimenting with my Xiaomi mi 9T Pro running MIUI Global 10.3.3.0 (Stock) I checked everything before buying and the phone is fully compatible with my carrier (I'm from Venezuela), however, I noticed that when the phone is on 4G it switches to 3G/H/H+ in order to make/receive calls (which is pretty normal since my carrier does not support VoLTE). The problem comes when there is an incoming call, it should switch automatically to 3G/H/H+ BUT it does not happen all the time, in fact, I can say that it only happens 25% of the time when I was testing, of course, when it does not happen there is no way to receive the incoming call.
So far I tried:
- Forcing the phone to stay on 3G (everything works great)
- Testing the different network options (it switches from 4G to 3G but not always as it should)
- Switching from SIM slot 1 to slot 2
- At the moment the preferred network type is LTE/TD-SCDMA/UMTS (default)
Could it be a software issue? or could it be related to my carrier? I haven't tried using a SIM card from another carrier.
After all, I bought a PHONE that does not behave like an actual phone all the time, so, I hope someone can help me with this.
Thanks in advance.
Click to expand...
Click to collapse
I have the same issue here in same phone but on EU MIUI 12.0.3.0 .. with the same symptoms u described .. i suspected in sim card and i replaced it with a new one and the issue still there .. did u find a solution for this issue?
I'm not sure if this is the same issue as what's described by OP, but it's somewhat similar (not receiving calls). Sometimes my colleagues will call me on Whatsapp and state that they're unable to reach me via the cellular network. This is what fixed it for me:
Settings - SIM cards & mobile networks - Select your sim card - turn off 'use volte (use volte to improve the quality of voice calls)'
scarmage said:
I'm not sure if this is the same issue as what's described by OP, but it's somewhat similar (not receiving calls). Sometimes my colleagues will call me on Whatsapp and state that they're unable to reach me via the cellular network. This is what fixed it for me:
Settings - SIM cards & mobile networks - Select your sim card - turn off 'use volte (use volte to improve the quality of voice calls)'
Click to expand...
Click to collapse
I tried this option and also not working the issue still there since 10 daysi also tried
Settings all specs then internal storage then sim 1 then change the setting to gsm only
After that the line working for 10 min and then again i can't receive calls or make ones
I have the same problem i have a redmi note 9 pro, i can't receive calls in 4G, i only can receive calls in Edge someone could resolve this? I tried all of these methods but nothing works

Volte and vowifi icons not showing

Volte and vowifi icons not showing in status bar even enabled all and turned on show
audismart007 said:
Volte and vowifi icons not showing in status bar even enabled all and turned on show
Click to expand...
Click to collapse
Had this on my 9T Pro and also on my current F2 pro.
Don't know why but if you have a Lte connection showing and when you make a call and the Lte symbol stays that means VoLte works.
Snah001 said:
Don't know why but if you have a Lte connection showing and when you make a call and the Lte symbol stays that means VoLte works.
Click to expand...
Click to collapse
It's because VoLTE is Voice over LTE.
If the call is not established over LTE then connection drops to 3G/UMTS during the call
Did you actually understand what I wrote?
Snah001 said:
Did you actually understand what I wrote?
Click to expand...
Click to collapse
I cited your part about icon and explained you why LTE icon disappears if call is not established.
LTE is data connection and for non VoLTE call, connection drops to 3G/UMTS.
Therefore, you are in the call:
- if LTE stays, it means call goes over LTE = VoLTE call
- if LTE disappears, call was not established over LTE
Not specific to Xiaomi, you can Google about
Not answering why you cannot establish VoLTE calls
Yeah thanks guys,after some random restart the icons now working fine
audismart007 said:
Yeah thanks guys,after some random restart the icons now working fine
Click to expand...
Click to collapse
Hi, I have a similar issue with Mi11 and MIUI 12: no VOLTE icon in taskbar and no HD badge in dialer during a call.
SIM is fine: if I put it in a Samsung the HD badge in dialer shows up, also 4G remains active during call.
same issue in Mi 11x pro!
Miui 12.5 is still not refined.

VoWIFI enabled but strange behavior

I've enabled VoWIFI in the Sim Card Settings and sometimes the icon in the status bar appears when I'm at home and connected to my wifi router (not always).
Sometimes I do not receive calls, but receive the SMS for a missed call a second later. Sometimes I can hear the caller, but he can't hear me until I disable wifi on my phone.
Also switch to airplane mode and turn wifi on, to check if VoWifi is working., But I'm not able to call somebody because VoWIFI (Icon) not available. Should be not a carrier system because it works quite well with the same sim card in my girlfriends Mi 9 lite phone, recently tested.
Anything I can reset, configure, check?

Question Why I don't have wifi calling

Hi,
I have Mi 11 Ultra with global MIUI 12.5.6 and in menu there is not wifi calling. I try many ways but nothing happened. After enetring code *#*#869434#*#* I get "VoWIFI carrier check was enabled" but still lack of wifi calling button in menu. Please help me.
*#*#86583#*#* use that one too
thanks lil_kujo, but VoLTE works fine. But still I dont have VoWIFI in my settings menu. Very strange, I fill confused....

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