Develop Bugs

VoLTE issues in Citrus CAF Rom

Hi all,
I've recently installed the CITRUS CAF- 3.1- Tangerine- Official rom in my indian Z2 Plus phone.
The rom is very stable so far and I've been experiencing only one major issue.
VoLTE is not working. I am using JIO network for this. My SIM is working fine(tested in other phones) and LTE mode is turned on in this device.
Help needed
Thanks.

Sri095 said:
Hi all,
I've recently installed the CITRUS CAF- 3.1- Tangerine- Official rom in my indian Z2 Plus phone.
The rom is very stable so far and I've been experiencing only one major issue.
VoLTE is not working. I am using JIO network for this. My SIM is working fine(tested in other phones) and LTE mode is turned on in this device.
Help needed
Thanks.
Click to expand...
Click to collapse
Volte working fine in citrus (I am using jio) you might need to upgrade the baseband. Please post in the specific ROM thread.

Volte problem in both RR roms

Hi from past 2 days I've been flashing custom roms on my device and did a hardbrick (but solved it from customer care they replaced motherboard in less then 4hrs).
alright, so after this first I flashed official RR Rom, volte did not work. I thought the issue is in rom so I flashed unofficial RR rom then again it didn't work.
today i flashed stock OOS 4.0.2 to revert back to stock. volte worked just fine. is it something am i missing ?
I might not be able to use custom rom as it don't allow me to use VOLTE (Jio sim)
any help would be appreciated.
p.s.
i have tried everything in custom rom to enable volte it didn't worked
enabling volte provision in *#*#4636#*#*
enabling enhanced lte in sim setting.

any mod please move this thread in oneplus 3t question answer
thanks

nvm it is fixed now after flashing stock rom volte worked then later i flashed RR rom and voila volte work's!!!

DeceptiPrime said:
nvm it is fixed now after flashing stock rom volte worked then later i flashed RR rom and voila volte work's!!!
Click to expand...
Click to collapse
Bro what steps did you follow in flashing RR to make work? like what all the things you wiped and did you flash the firmware also? Thanks!

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 for project treble???

When volte is available in gsi...??

There is almost 0 chance of getting VoLTE in treble builds because they're supposed to be generic.

That's bad for the future of Android considering carriers are planning on dropping 2G network support

No volte on gsi=no treble in india

Then there is no future for GSI at least. Because Volte is an advanced IMS technology. Many service provider now starts giving Volte. Even latest all phone launched with dual 4g volte. If GSI can't adopt Volte from generic partition then that's very bad news.

Ani96 said:
Then there is no future for GSI at least. Because Volte is an advanced IMS technology. Many service provider now starts giving Volte. Even latest all phone launched with dual 4g volte. If GSI can't adopt Volte from generic partition then that's very bad news.
Click to expand...
Click to collapse
"No future" lol volte is actively being worked on and tested. Chill

joemossjr said:
"No future" lol volte is actively being worked on and tested. Chill
Click to expand...
Click to collapse
The problem with that is, there isn't a "one-size-fits-all" solution when it comes to VoLTE. Some OEMs such as LG make their own IMS stack rather than using Qualcomm's. Which makes universally supporting it much more difficult

VOLTE is a technology almost used only on India phones company. So it's a not priority on my view. The priority is to make GSIs stable first

LGR0102 said:
VOLTE is a technology almost used only on India phones company. So it's a not priority on my view. The priority is to make GSIs stable first
Click to expand...
Click to collapse
T-Mobile's bad 2/3g coverage in the United States causes missed calls because their LTE coverage is better than their 2/3g coverage. That is a huge downside to using custom ROMs on T-Mobile/MetroPCS without VoLTE support. I've spent a lot of time trying to enable VoLTE on my LG K20 Plus, Stylo 2 Plus, and Stylo 3 plus lineageOS builds but failed due to LG's custom IMS.

I don't know why i'm still laughing.. But that part totally depend on your Modem/Firmware..
Nowday's, Almost Every custom ROM support VoLTE.. It's Vendor's Responsibility to release proper Modem/firmware to support it..
If Your Device support VoLTE, It should work with Custom ROM GSI As well..
So, If VoLTE does't work, Provide Logcat to Dev's & let them take a look.. They need to Patch Kernel, Vendor & DT..
No Logcat = No VoLTE

If device have volte and it's perfectly working with Custom Rom(Treble) that doesn't mean it will work with GSI also.
Till now GSI doesn't support Volte. I think in future It will support that.:good:

Ani96 said:
If device have volte and it's perfectly working with Custom Rom(Treble) that doesn't mean it will work with GSI also.
Till now GSI doesn't support Volte. I think in future It will support that.:good:
Click to expand...
Click to collapse
GSI does support VoLTE if vendor supports VoLTE, as @Ani96 mentioned.

phhusson said:
GSI does support VoLTE if vendor supports VoLTE, as @Ani96 mentioned.
Click to expand...
Click to collapse
Ohh Then sry from my side . But some dev directly said that Volte is not possible. ...

Ani96 said:
Ohh Then sry from my side . But some dev directly said that Volte is not possible. ...
Click to expand...
Click to collapse
I have EMUI 8 (OREO) stock in my honor 6x which has VOLTE support. Now, If I flash other system image (GSI) then that flashed GSI will support VOLTE or not?

phhusson said:
GSI does support VoLTE if vendor supports VoLTE, as @Ani96 mentioned.
Click to expand...
Click to collapse
Good to hear that GSI support VoLTE. Problem is that AOSP phh-treble rom dont have the functionality to turn VoLTE on.

CYB3R0ID694 said:
I don't know why i'm still laughing.. But that part totally depend on your Modem/Firmware..
Nowday's, Almost Every custom ROM support VoLTE.. It's Vendor's Responsibility to release proper Modem/firmware to support it..
If Your Device support VoLTE, It should work with Custom ROM GSI As well..
So, If VoLTE does't work, Provide Logcat to Dev's & let them take a look.. They need to Patch Kernel, Vendor & DT..
No Logcat = No VoLTE
Click to expand...
Click to collapse
volte didnt work on oreo on my pixel(using french telecom bouygues) but it worked on pie. So no, it doesnt always work

Unknown issue
phhusson said:
GSI does support VoLTE if vendor supports VoLTE, as @Ani96 mentioned.
Click to expand...
Click to collapse
My vindor supports Volte .
Wen i flash Android 10 gsi . Incoming call working , o/c not , working , sending text Working , R/t not working . IMS Service Registered but Voiceoverlte not available . .. ? Hw to fix this please help me . Lineage os 17.1.
My device Redmi 8a olivelite

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.