Develop Bugs

A custom rom with volte?

:crying:

Which country??

911-Future_Maker said:
Which country??
Click to expand...
Click to collapse
India

Give it time
Sent from my Lenovo P2a42 using Tapatalk

Uibon said:
Give it time
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Click to collapse
Im tired of this reflashed the stock deodexed rom thats 100 times better without any bugs.

The stock ROM is near stockish Android what's the hurry?
If you have root access which the deodexed one does, then install substratum to get some extra looks...

Frankly speaking any custom/stock rom without volte support is useless in India. If Lenovo does not include the volte feature in p2 then probably nobody bought this phone in india. I love this phone and also bought it. But due to lack of Indian dev in xda for this device, there is no volte custom rom till now.

dipendra.info said:
Frankly speaking any custom/stock rom without volte support is useless in India. If Lenovo does not include the volte feature in p2 then probably nobody bought this phone in india. I love this phone and also bought it. But due to lack of Indian dev in xda for this device, there is no volte custom rom till now.
Click to expand...
Click to collapse
I'm also Indian and fully agreed with you. The developer should have to build rom with volte support without that ROM is useless

Javed ali said:
I'm also Indian and fully agreed with you. The developer should have to build rom with volte support without that ROM is useless
Click to expand...
Click to collapse
I have to say this. I'm also from india.
Because of reliance JIO everyone asking VOLTE. Most of us using it for data only. So we could survive with data alone.
Otherwise we can use app feature for calling right?
Don't hurry the dev for VOLTE. Let them make their custom rom more stable one then add this VOLTE support feature.
Without stable system features alone won't make it.

MAILUS said:
I have to say this. I'm also from india.
Because of reliance JIO everyone asking VOLTE. Most of us using it for data only. So we could survive with data alone.
Otherwise we can use app feature for calling right?
Don't hurry the dev for VOLTE. Let them make their custom rom more stable one then add this VOLTE support feature.
Without stable system features alone won't make it.
Click to expand...
Click to collapse
We are just hopping for volte not getting hurry.

Why not switch to Airtel pay 399₹ get 2gb data per day and unlimited calls to any network for 84days.
Sent from my Lenovo P2a42 using Tapatalk

Not able to use VOLte on k5 plus using lineage 14.1 latest build

I just installed lineage 14.1 Nougat latest build in the hope of getting volte support as it has been pointed out in the post that volte is working but here volte is not working .No HD or volte sign in status bar or any volte switch in settings .Help please

1. Enable wifi calling
2. Re-enable volte (Enhanced LTE mode)

VoLTE sign does not appear in the Lineage OS.
As told by Impulsar do the above two steps and VoLTE should work

Which is the best nougat ROM available for this device. With volte working? Sorry for asking this, it is for my friends phone. Please give some good suggested ROM on nougat with less bugs and good battery performance.

stonny20 said:
Which is the best nougat ROM available for this device. With volte working? Sorry for asking this, it is for my friends phone. Please give some good suggested ROM on nougat with less bugs and good battery performance.
Click to expand...
Click to collapse
RR rom

Volte on OnePlus 3 USA version

Hello All,
My sister has a oneplus 3 Us version running on Stable OOS version Oreo 8.0, recently she moved to India permanently and I ported her number to Jio as Vodafone doesn't have 4G in my place nor the device has Vodafone 3G band. So the US version has a band that works with Jio.
Model A3000
The problem is she can use data but calling doesn't work with normal dialer. So I contacted Jio and they told the US version doesn't support Volte hence the rep asked me to download Jio4gvoice App from playstore.. After using this app we can call but the data should always be on which is problematic as in some cases when there is no network while travelling she cannot call nor receive calls.
I checked the *#*#4636#*#* code and Volte provisioned is On. However the radio band is showing United States and cellular 800. I KNOW for sure that Jio supports Volte on all bands it operates B3, B5 and B40
THIS Model of Us version supports only B5 850 mhz. My question is has oneplus not released a software update to enable Volte or can I try flashing custom rom to check if Volte works on custom rom.
Any help will be appreciated.

Jigneshg said:
Hello All,
My sister has a oneplus 3 Us version running on Stable OOS version Oreo 8.0, recently she moved to India permanently and I ported her number to Jio as Vodafone doesn't have 4G in my place nor the device has Vodafone 3G band. So the US version has a band that works with Jio.
Model A3000
The problem is she can use data but calling doesn't work with normal dialer. So I contacted Jio and they told the US version doesn't support Volte hence the rep asked me to download Jio4gvoice App from playstore.. After using this app we can call but the data should always be on which is problematic as in some cases when there is no network while travelling she cannot call nor receive calls.
I checked the *#*#4636#*#* code and Volte provisioned is On. However the radio band is showing United States and cellular 800. I KNOW for sure that Jio supports Volte on all bands it operates B3, B5 and B40
THIS Model of Us version supports only B5 850 mhz. My question is has oneplus not released a software update to enable Volte or can I try flashing custom rom to check if Volte works on custom rom.
Any help will be appreciated.
Click to expand...
Click to collapse
The pronlem you will face is that VOLTE is not really used in the states so most devices dont support it. Let alone for a country where they released a different version.
As for the data always being on, well that is something you will have to deal with as that is just what VOLTE is. LTE is a data connection. Not really a non data cell connection.

zelendel said:
The pronlem you will face is that VOLTE is not really used in the states so most devices dont support it. Let alone for a country where they released a different version.
As for the data always being on, well that is something you will have to deal with as that is just what VOLTE is. LTE is a data connection. Not really a non data cell connection.
Click to expand...
Click to collapse
I do agree with you. However, I wanted to check if flashing any custom rom can be of help? Or does it relate to hardware.

Jigneshg said:
I do agree with you. However, I wanted to check if flashing any custom rom can be of help? Or does it relate to hardware.
Click to expand...
Click to collapse
I know some roms support VOLTE but not many do. You will have to look deeply into it.

Use others like airtel etc.

drmuruga said:
Use others like airtel etc.
Click to expand...
Click to collapse
Sorry but US version of OnePlus 3 doesn't have the BAND which Airtel uses.

Jigneshg said:
Hello All,
My sister has a oneplus 3 Us version running on Stable OOS version Oreo 8.0, recently she moved to India permanently and I ported her number to Jio as Vodafone doesn't have 4G in my place nor the device has Vodafone 3G band. So the US version has a band that works with Jio.
Model A3000
The problem is she can use data but calling doesn't work with normal dialer. So I contacted Jio and they told the US version doesn't support Volte hence the rep asked me to download Jio4gvoice App from playstore.. After using this app we can call but the data should always be on which is problematic as in some cases when there is no network while travelling she cannot call nor receive calls.
I checked the *#*#4636#*#* code and Volte provisioned is On. However the radio band is showing United States and cellular 800. I KNOW for sure that Jio supports Volte on all bands it operates B3, B5 and B40
THIS Model of Us version supports only B5 850 mhz. My question is has oneplus not released a software update to enable Volte or can I try flashing custom rom to check if Volte works on custom rom.
Any help will be appreciated.
Click to expand...
Click to collapse
4G is Volte. Your phone shows 4G.
For Jio to work whether for calls or data, data should always be on. This is because, unlike 3/2G, Jio uses data for voice calls also. So even if you have A3003 model, if you shut off data, calls will not work in Jio.
When there is no network, no phone can be used for calls. It is not clear what you are trying to convey.

tnsmani said:
4G is Volte. Your phone shows 4G.
For Jio to work whether for calls or data, data should always be on. This is because, unlike 3/2G, Jio uses data for voice calls also. So even if you have A3003 model, if you shut off data, calls will not work in Jio.
When there is no network, no phone can be used for calls. It is not clear what you are trying to convey.
Click to expand...
Click to collapse
I am using Indian oneplus 3T, I always have my data Off on Jio. And I can still call coz the phone has Volte enabled but on the US version only data works as OnePlus has not released a software update which includes Volte.
Once the US version of OnePlus 3, we cannot call via normal dialer we have to use Jio4gvoice app to make calls. What I am saying is I also tried and put my sister's sim card in my Indian version of OnePlus 3 T and even without mobile data being on I can still make calls but not on her US version.
I hope I am clear. So my question was can I flash custom roms as most oreo roms are Volte enabled on US version to give a try if that will work.

Jigneshg said:
I am using Indian oneplus 3T, I always have my data Off on Jio. And I can still call coz the phone has Volte enabled but on the US version only data works as OnePlus has not released a software update which includes Volte.
Once the US version of OnePlus 3, we cannot call via normal dialer we have to use Jio4gvoice app to make calls. What I am saying is I also tried and put my sister's sim card in my Indian version of OnePlus 3 T and even without mobile data being on I can still make calls but not on her US version.
I hope I am clear. So my question was can I flash custom roms as most oreo roms are Volte enabled on US version to give a try if that will work.
Click to expand...
Click to collapse
did you find any fix?

Sharfuddin Ahmed said:
did you find any fix?
Click to expand...
Click to collapse
No buddy. My jio app is only the way to make calls. My sister is missing so many calls due to this whenever the signal goes myjio app is offline.
Just waiting for 90 days to be completed and we have decided to port out of Jio.

Jigneshg said:
No buddy. My jio app is only the way to make calls. My sister is missing so many calls due to this whenever the signal goes myjio app is offline.
Just waiting for 90 days to be completed and we have decided to port out of Jio.
Click to expand...
Click to collapse
Oh. That's sad. Hope you'll get some better alternative. However in my case, I too have Indian op3t and using Airtel connection. But unfortunately its volte is only working on Oxygen OS . no matter what custom roms I try I end up getting no volte:crying:. I've tried almost every combination (like clean flashing oxygen OS then custom Rom but still no success) . It always says IMS and other stuffs not registered or unavailable under phone info (that is by dialling *#*#4636#*#* ) in every custom rom :crying:. I have tried wiping my all partitions flashed custom rom after oxygen OS too many times but still no success. ?
Sent from my OnePlus3T using XDA Labs

Sharfuddin Ahmed said:
Oh. That's sad. Hope you'll get some better alternative. However in my case, I too have Indian op3t and using Airtel connection. But unfortunately its volte is only working on Oxygen OS . no matter what custom roms I try I end up getting no volte:crying:. I've tried almost every combination (like clean flashing oxygen OS then custom Rom but still no success) . It always says IMS and other stuffs not registered or unavailable under phone info (that is by dialling *#*#4636#*#* ) in every custom rom :crying:. I have tried wiping my all partitions flashed custom rom after oxygen OS too many times but still no success. ?
Click to expand...
Click to collapse
I think the Volte configuration of Airtel is quite different from Jio.
I wud suggest you once to try clean flashing oxygen os and install custom rom by first flashing latest firmware for op3t, custom rom, gapps and check. I have seen people using Airtel Volte on custom roms.. Could you try Omni rom or Msm extended

Jigneshg said:
I think the Volte configuration of Airtel is quite different from Jio.
I wud suggest you once to try clean flashing oxygen os and install custom rom by first flashing latest firmware for op3t, custom rom, gapps and check. I have seen people using Airtel Volte on custom roms.. Could you try Omni rom or Msm extended
Click to expand...
Click to collapse
yes bro I've already done all that.. flashed too many times oos ( everytime volte is working in it) but if I flash any custom rom (also tried with and without FW) ,it doesn't. no matter what rom I try... ( yes I've tried omni , msm , rr , aosip etc but no luck:crying .

Sharfuddin Ahmed said:
yes bro I've already done all that.. flashed too many times oos ( everytime volte is working in it) but if I flash any custom rom (also tried with and without FW) ,it doesn't. no matter what rom I try... ( yes I've tried omni , msm , rr , aosip etc but no luck:crying .
Click to expand...
Click to collapse
That's bad. I use Jio Volte on my 3T that works perfect but Airtel configuration is different. I guess u only have OOS option to chose.. Maybe a fix will be released in future

Jigneshg said:
That's bad. I use Jio Volte on my 3T that works perfect but Airtel configuration is different. I guess u only have OOS option to chose.. Maybe a fix will be released in future
Click to expand...
Click to collapse
Yeah.. That's sad. however thanks for your help bud. really appreciated.:good:

Anyone find any solution regarding Volte problem in One plus 3T A3000 US model for Jio Volte in India ???

Sharfuddin Ahmed said:
yes bro I've already done all that.. flashed too many times oos ( everytime volte is working in it) but if I flash any custom rom (also tried with and without FW) ,it doesn't. no matter what rom I try... ( yes I've tried omni , msm , rr , aosip etc but no luck:crying .
Click to expand...
Click to collapse
I Have Oneplus 3T Us A3000 Model. I am From India
actually here is the main issue is Volte Related, meanwhile 4g is working internet working super but Volte for calling not working. even i switch on Volte in settings but still they did not work for i try everything.
then i search and got the band issue is here i checked my Network provider using Band 3,5,40.
but in my mobile has band 5. so i unlock rest network bands by Qcn File of CN.
successfully unlocked the all my network provider bands.
but still Volte is not working i try my all efforts and things factory reset, custom rom but still Volte not working for me.
2nd issue
even now only 1 sim can work at a time other network gone out and when i try to search network the error comes (error while searching network)
means dual stand by is not working for me. vice versa same when i switch internet on 2nd sim 1st network gone
even i switch 1 sim on 4G and other on 2G.
?please help me out my Oneplus 3T is down
---------- Post added at 07:39 AM ---------- Previous post was at 07:38 AM ----------
Jigneshg said:
That's bad. I use Jio Volte on my 3T that works perfect but Airtel configuration is different. I guess u only have OOS option to chose.. Maybe a fix will be released in future
Click to expand...
Click to collapse
I Have Oneplus 3T Us A3000 Model. I am From India
actually here is the main issue is Volte Related, meanwhile 4g is working internet working super but Volte for calling not working. even i switch on Volte in settings but still they did not work for i try everything.
then i search and got the band issue is here i checked my Network provider using Band 3,5,40.
but in my mobile has band 5. so i unlock rest network bands by Qcn File of CN.
successfully unlocked the all my network provider bands.
but still Volte is not working i try my all efforts and things factory reset, custom rom but still Volte not working for me.
2nd issue
even now only 1 sim can work at a time other network gone out and when i try to search network the error comes (error while searching network)
means dual stand by is not working for me. vice versa same when i switch internet on 2nd sim 1st network gone
even i switch 1 sim on 4G and other on 2G.
?please help me out my Oneplus 3T is down

Do you have any fix ?
Did you check with One plus 3 or any support and find any fix. Unlocking of indian bands or software update is available ?

9988338275 said:
I Have Oneplus 3T Us A3000 Model. I am From India
actually here is the main issue is Volte Related, meanwhile 4g is working internet working super but Volte for calling not working. even i switch on Volte in settings but still they did not work for i try everything.
then i search and got the band issue is here i checked my Network provider using Band 3,5,40.
but in my mobile has band 5. so i unlock rest network bands by Qcn File of CN.
successfully unlocked the all my network provider bands.
but still Volte is not working i try my all efforts and things factory reset, custom rom but still Volte not working for me.
2nd issue
even now only 1 sim can work at a time other network gone out and when i try to search network the error comes (error while searching network)
means dual stand by is not working for me. vice versa same when i switch internet on 2nd sim 1st network gone
even i switch 1 sim on 4G and other on 2G.
please help me out my Oneplus 3T is down
---------- Post added at 07:39 AM ---------- Previous post was at 07:38 AM ----------
I Have Oneplus 3T Us A3000 Model. I am From India
actually here is the main issue is Volte Related, meanwhile 4g is working internet working super but Volte for calling not working. even i switch on Volte in settings but still they did not work for i try everything.
then i search and got the band issue is here i checked my Network provider using Band 3,5,40.
but in my mobile has band 5. so i unlock rest network bands by Qcn File of CN.
successfully unlocked the all my network provider bands.
but still Volte is not working i try my all efforts and things factory reset, custom rom but still Volte not working for me.
2nd issue
even now only 1 sim can work at a time other network gone out and when i try to search network the error comes (error while searching network)
means dual stand by is not working for me. vice versa same when i switch internet on 2nd sim 1st network gone
even i switch 1 sim on 4G and other on 2G.
please help me out my Oneplus 3T is down
Click to expand...
Click to collapse
ive the same problem ive hong kong varient did you found any fix?

Oreo based Custom ROM with VOLTE support

Is there any Android 8.1 based custom rom which support VOLTE. Airtel has started using VOLTE, so far VOLTE is only working on Oxygen OS

Even i have not found any custom rom with which airtel volte is working. Exception being of course oos based roms.

I used most ROMs in which volte working well, I use jio, not airtel. Airtel volte is not available here.

Yes jio is working fine on almost all roms.

nondroid said:
Is there any Android 8.1 based custom rom which support VOLTE. Airtel has started using VOLTE, so far VOLTE is only working on Oxygen OS
Click to expand...
Click to collapse
suyashlimaye said:
Even i have not found any custom rom with which airtel volte is working. Exception being of course oos based roms.
Click to expand...
Click to collapse
Did you guys find any/any alternate fix? It's same here. no matter what custom rom I try I end up getting no Airtel volte. It's only working on Oxygen OS:crying:
Sent from my OnePlus3T using XDA Labs

Airtel, Vodafone VoLTE support on stock/custom Z2 plus possible?

Even though z2 plus supports VoLTE (Jio works fine), for some reason on Airtel and Vodafone 4g networks z2 plus is not supported for VoLTE.
Airtel and Vodafone however support VoLTE for many other phones like the Xiaomi mi5, redmi 4,5, one plus etc. In which case, is it not possible to figure out what it is that allows other phones to access VoLTE on these networks and then extract these necessary files/configurations from the ROM and install it in z2 plus stock or custom ROMs to enable support for VoLTE?

For me volte works fine.
BTW I am using Vodafone 4g

Psdpavan said:
For me volte works fine.
BTW I am using Vodafone 4g
Click to expand...
Click to collapse
You are using a custom ROM right? Which one?
Would it be possible to create a flashable mod maybe to enable VoLTE (for Airtel and Vodafone) on the Stock ZUI ROM?

The effort and hassle you may take to make your device ready for flashing process is 90% of total work before using a Custom ROM.
Compare to ZUI, any Custom ROM is thousand times better.
Why not trying the entire thing then?
And if I am not mistaking, ZUI 4.0.xxx (stock / official) supports other network VoLTE. Given you are in a location or accessing a tower which is VoLTE capable and keeping your AirTel/Vodafone SIM card in your SIM Slot 1.
I don't think VoLTE may work with SIM Slot 2.
Thanks.

Debu_013 said:
You are using a custom ROM right? Which one?
Would it be possible to create a flashable mod maybe to enable VoLTE (for Airtel and Vodafone) on the Stock ZUI ROM?
Click to expand...
Click to collapse
After flashing zui 4.xxx volte started working like a bang!
Then I flashed aex 6.0.
That's it.

Which ZUI version to be flashed and it should be official or custom and should be flashed via QPST or TWRP ?

See i just want to clarify that zuk z2 plus , supports volte on all networks. It depends on the sim type and the area you are located in.
See , i just tried that . my friends sim supports volte (Airtel) and when i put that sim in my phone(zuk) i could make calls over lte .
So try contacting airtel/network provider to get a sim swap.

akshay pro said:
See i just want to clarify that zuk z2 plus , supports volte on all networks. It depends on the sim type and the area you are located in.
See , i just tried that . my friends sim supports volte (Airtel) and when i put that sim in my phone(zuk) i could make calls over lte .
So try contacting airtel/network provider to get a sim swap.
Click to expand...
Click to collapse
I am using Z2 Plus with ZUI 2.5.104 ST and this version is unable to use VoLTE. I have put the same SIM card in a Redmi Note 4 and VoLTE works there. I have also contacted Airtel/Vodafone and their answer is simply update OS, no official support.
Since on Custom ROMs it seems to be working, I just want to know if it could be possible to make it work on the Stock one as well. If it is working on ZUI 3.5/3.7/4.0 versions like the deodexed one or RuMod then I could switch to it.
I like the bottom quick settings and U-touch too much, and it holds me back from changing to an AOSP ROM.

Debu_013 said:
I like the bottom quick settings and U-touch too much, and it holds me back from changing to an AOSP ROM.
Click to expand...
Click to collapse
Regarding U-Touch, yes you can get similar options as in ZUI in Custom ROMs too by tweaking fpc1020tp.kl file.
Psdpavan said:
After flashing zui 4.xxx volte started working like a bang!
Then I flashed aex 6.0.
That's it.
Click to expand...
Click to collapse
Hmm, interesting.
You are from which circle? I am in Vodafone Mumbai but VOLTE not working for me. But then have been on custom ROMs for too long. In past Jio did work for me... had got it working on ZUI before flashing custom ROMs.

I flashed zui 3.5 and turned on volte and then updated to the zui 4.0.x and volte was working and after this process every other custom ROMs are working with Airtel volte.

dknsb said:
I flashed zui 3.5 and turned on volte and then updated to the zui 4.0.x and volte was working and after this process every other custom ROMs are working with Airtel volte.
Click to expand...
Click to collapse
Hmm. Where you already on custom rom before flashing ZUI 3.5 for first time?

mGforCe said:
Hmm. Where you already on custom rom before flashing ZUI 3.5 for first time?
Click to expand...
Click to collapse
Yes before I was on custom ROM and volte wasn't working and even I flashed zui 3.5 before but forgot to enable volte and updated to zui 4 in this case volte wasn't working but when I enabled volte in zui 3.5 it started working

dknsb said:
Yes before I was on custom ROM and volte wasn't working and even I flashed zui 3.5 before but forgot to enable volte and updated to zui 4 in this case volte wasn't working but when I enabled volte in zui 3.5 it started working
Click to expand...
Click to collapse
i am on AEX 5.7
Baseband : 1.76 (as it came from indian zui final version)
So if i flash zui 3.5 then zui 4, does it change baseband ,if it does changes baseband any problem u face ?
And u mean after this process after zui 4 if flash AEX 5.7 it will support vodafone/Airtel volte ?

Airtel VoLTE works on Stock ROM and Custom ROM
Hi,
Kindly check this :
https://forum.xda-developers.com/showpost.php?p=78580727&postcount=6
I could not check it for ZUI 2.5 and ZUI 3.5, but saw it working for ZUI 4.0.199 and AEX 6.0
Not Sure if the signal strength is good, but at least VoLTE is working.
Regards,
Amit

vatstarun18 said:
i am on AEX 5.7
Baseband : 1.76 (as it came from indian zui final version)
So if i flash zui 3.5 then zui 4, does it change baseband ,if it does changes baseband any problem u face ?
And u mean after this process after zui 4 if flash AEX 5.7 it will support vodafone/Airtel volte ?
Click to expand...
Click to collapse
I've done this method on pie roms but I think it's the issue of baseband. there won't be any problem or performance changes in swapping baseband, zui 3.5 qfil to zui 4 ota worked for me ,but don't forget to enable volte in zui 3.5 before updating to zui 4.0 . I can't confirm bcz I don't have aex 5.7 with me.

dknsb said:
I flashed zui 3.5 and turned on volte and then updated to the zui 4.0.x and volte was working and after this process every other custom ROMs are working with Airtel volte.
Click to expand...
Click to collapse
Can u share me the links plzzz
---------- Post added at 01:17 PM ---------- Previous post was at 01:09 PM ----------
Psdpavan said:
After flashing zui 4.xxx volte started working like a bang!
Then I flashed aex 6.0.
That's it.
Click to expand...
Click to collapse
Can u share me the zui 4 link that u had installed

LAKSHMI SAINATH said:
Can u share me the links plzzz
---------- Post added at 01:17 PM ---------- Previous post was at 01:09 PM ----------
Can u share me the zui 4 link that u had installed
Click to expand...
Click to collapse
Hi Lakshmi, Can you check my post above. I have shared the steps which got me VoLTE in Stock as well as Custom ROM.

All recent ROMs support Airtel VoLTE. The problem isn't with our device but it's Airtels VoLTE implementation. Unlike Jio, Airtel only enables VoLTE if the imei of the device in which the Sim is inserted is one of the officially supported device. (List on their website)
What you can do is as follows:
1. Insert your Sim in one of the officially supported device like iPhone, one plus, etc.
2. Keep using the phone until VoLTE is enabled (it takes Airtel anywhere from a few minutes to a couple of hours to activate VoLTE on a new sim, even when inserted in a supported phone!)
3. Once VoLTE is enabled on your Sim, you can switch back to your z2 and it should start working.

blueman24 said:
All recent ROMs support Airtel VoLTE. The problem isn't with our device but it's Airtels VoLTE implementation. Unlike Jio, Airtel only enables VoLTE if the imei of the device in which the Sim is inserted is one of the officially supported device. (List on their website)
What you can do is as follows:
1. Insert your Sim in one of the officially supported device like iPhone, one plus, etc.
2. Keep using the phone until VoLTE is enabled (it takes Airtel anywhere from a few minutes to a couple of hours to activate VoLTE on a new sim, even when inserted in a supported phone!)
3. Once VoLTE is enabled on your Sim, you can switch back to your z2 and it should start working.
Click to expand...
Click to collapse
Yeah, same with Vodafone too. I inserted my sim in redmi 4 and volte was not working and so i didn't knew this method of volte implementation so I reinserted my sim in z2 plus and told Vodafone on email that volte is not working for me(i didn't mentioned my device to them in the email). So they replied me that your device is lenovo z2132 which doesn't support volte officially.
Now I'll again insert my sim in redmi 4 to get volte working.
Thanks.