Database Users

[GUIDE]How to Enable VoLTE in All LineageOS Builds from 4th Jan to Current Build

After So much Confusion On VoLTE Issue, M making this Complete guide for All LineageOS(CM13) Users..
Soo, In this part We gotta know about Problems because of which VoLTE is broken for some users..
VoLTE issue appeared after @codeworkx sir release Seperate modems & Bootloader for Le2..
Many users Flashed Random Modems & Boatloader without knowing which modem is for which region...
So, Let's clarify which Modem & Bootloader is for which region..
Modem/Baseband :-
1. MPSS.TA.2.0.C18-56437
LINK :- http://eu.host.erwanleboucher.fr/codeworkx/lineage/s2/modems/MPSS.TA.2.0.C18-56437.zip
Region :- Possible Chinese/Russian/India
EUI Based :- No idea
2. MPSS.TA.2.0.C18-61295
LINK :- http://eu.host.erwanleboucher.fr/codeworkx/lineage/s2/modems/MPSS.TA.2.0.C18-61295.zip
Region :- Possible Chinese/Russian/India
EUI Based :- No idea
3. MPSS.TA.2.0.C18-66782_VoLTE_dangerous
LINK :- http://eu.host.erwanleboucher.fr/co...ems/MPSS.TA.2.0.C18-66782_VoLTE_dangerous.zip
Region :- Possible Chinese/Russian/India
EUI Based :- EUI 19s
4. MPSS.TA.2.1.C7-68083
LINK :- http://eu.host.erwanleboucher.fr/codeworkx/lineage/s2/modems/MPSS.TA.2.1.C7-68083.zip
Region :- Possible Chinese/Russian/India
EUI Based :- EUI 20s
Bootloader :-
1. bootloader-19S-india-s2ww
LINK :- http://eu.host.erwanleboucher.fr/codeworkx/lineage/s2/bootloaders/bootloader-19S-india-s2ww.zip
Region :- Specially for India
EUI Based :- EUI 19s
2. bootloader-20S-s2
LINK :- http://eu.host.erwanleboucher.fr/codeworkx/lineage/s2/bootloaders/bootloader-20S-s2.zip
Region :- Specially Chinese/Russian
EUI Based :- EUI 20s
Soo, Now it's clear that Which Bootloader & Modem is based on which region & EUI based.. :fingers-crossed:
Now let's see why many people's facing Issue..
1. Flashed Wrong Modem/Baseband
Issue :- Some peoples flashed wrong Modem for get VoLTE in hurry without knowing which Modem support VoLTE..
Solution :- 2 Solutions
1. As of now, Only 19s Modem/Baseband Just flash it..
2. Flash whole 19s Stock ROM & Flash Lineage/CM
2. Flashed 20s Bootloader
Issue :- Due to Wrong Bootloader, ROMs facing Issues
Solution :- 2 Solutions
1. As of now, Only 19s Modem/Baseband Just flash it..
2. Flash whole 19s Stock ROM & Flash Lineage/CM

This part is we gonna know how to fix VoLTE
FIX 1 :- Little complicate
1. Download Stock 19s ROM
LINK :- Click Here
2. If you are on TWRP by Codeworkx sir, You have to change TWRP..
Download TWRP & Flash it with Current TWRP. Thanks to @ycjeson for Making this Recovery.
LINK :- CLICK HERE
3. Now Copy Stock 19s ROM which you downloaded in 1st step in Your Le2.
4. Flash it with TWRP which we installed in 2nd step.
PS :- Your all data will get wiped after installing Stock ROM.. Even TWRP get replaced with Stock Recovery.. So better take backup of your data.
5. Now, you are on Stock EUI 19s.. Use it for 30 minutes, Do calls, use data..
6. Now, if your Bootloader is Still unlocked, Flash Latest TWRP by codeworkx via PC
Tutorial LINK :- Click Here
7. Now, 3. Download Latest LineageOS build by codeworkx & Copy it in your Le2
LINK :- Click Here
8. Now Boot in TWRP by Holding Volume down + Power buttons.
9. Go in Wipe & select Dalvik Cache, Cache, System, Data & Swipe to Wipe
10. Now go back to main menu & Select Install.
Now navigate to location where You copied LineageOS in 7th step & Swipe to flash..
Most important part start here
After Your device start, you might see You have VoLTE working.. But due to some bug, It will get disappear after 1st Reboot. Soo, Let's fix it..
1. Open Settings -> Sim Settings. Now set Call, Data & SMS to Jio..
2. Now open sim 1/Jio sim cellular setting & Enable Data roaming.
3. Now Go in Access Point Name & Create New APN as given follow.. Only 3 things to set.
1. APN name :- ims
2. APN :- IMS
3. APN Type :- IMS
& save.
PS :- APN & APN type is in Capital letters.. You have to set it as given because due to bug, if APN type get small letter, Setting get wiped after save.
4. Now set Jio Internet as default & close settings.
5. Now open Dialer & click on right top 3 Dots & select setting.
6. Set Make calls with JIO & then click on Sim 1 which is Jio.
7. After that click on IMS settings
8. In IMS setting, Set VT call quality to High
Here you will face 1 bug..
After clicking VT calling service, you will see 2 options :- High & Low..
But even after selection you can't see which is selected.. Just ignore it..
Now go back, Close Dialer & Reboot Phone...
Now open dialer.. You can see little change in sim icon..
Done.... Enjoy VoLTE calling on JIO sim..
FIX 2:- More simple
This fix is for those who are already on LineageOS(M prefer Clean flash)
1. Download 19s Modem Provided by codeworkx
LINK :- Click Here
2. Flash it with TWRP.
Most important part start here
After Your device start, you might see You have VoLTE working.. But due to some bug, It will get disappear after 1st Reboot. Soo, Let's fix it..
1. Open Settings -> Sim Settings. Now set Call, Data & SMS to Jio..
2. Now open sim 1/Jio sim cellular setting & Enable Data roaming.
3. Now Go in Access Point Name & Create New APN as given follow.. Only 3 things to set.
1. APN name :- ims
2. APN :- IMS
3. APN Type :- IMS
& save.
PS :- APN & APN type is in Capital letters.. You have to set it as given because due to bug, if APN type get small letter, Setting get wiped after save.
4. Now set Jio Internet as default APN & close settings.
5. Now open Dialer & click on right top 3 Dots & select setting.
6. Set Make calls with JIO & then click on Sim 1 which is Jio.
7. After that click on IMS settings
8. In IMS setting, Set VT call quality to High
Here you will face 1 bug..
After clicking VT calling service, you will see 2 options :- High & Low..
But even after selection you can't see which is selected.. Just ignore it..
Now go back, Close Dialer & Reboot Phone...
Now open dialer.. You can see little change in sim icon..
Done.... Enjoy VoLTE calling on JIO sim..

again reserved

Cdma not work
China telecom 2g/3g work on CDMA ,But this ROM can't search CDMA ,gms searching use lot battary

chao2142 said:
China telecom 2g/3g work on CDMA ,But this ROM can't search CDMA ,gms searching use lot battary
Click to expand...
Click to collapse
Basically,
You have to Set your network priority for China Telecom Sim From LTE to 3G..
Setting :- Sim Cards :- Cellular Network Setting :- Select your Sim :- Set Preferred Network type from LET to 3G.

CYB3R0ID694 said:
Basically,
You have to Set your network priority for China Telecom Sim From LTE to 3G..
Setting :- Sim Cards :- Cellular Network Setting :- Select your Sim :- Set Preferred Network type from LET to 3G.
Click to expand...
Click to collapse
I tried ,even changed in textmod ,CDMA lte auto or CDMA only or GSM CDMA auto .it still search GSM .,lte is online .but search GSM take much battery

@CYB3R0ID694 I have tried your 2nd method but only LTE means data works after reboot. Volte vanished and not able to call .As well as volte sign missing in dialer icon.

Fix 1 ,will it work after reboot?

Please help
This is working for single sim. I am using one Jio sim and one Idea. Only able to call from one number at a time. If I put one Jio sim only, this process works for me. Together both sims are't working
Pls advice
Thanks .

umangloria said:
@CYB3R0ID694 I have tried your 2nd method but only LTE means data works after reboot. Volte vanished and not able to call .As well as volte sign missing in dialer icon.
Click to expand...
Click to collapse
Check if you have VT calling quality High from Dialer setting..
Looks like it's set to unknown due to some Sim setting..

Verma's said:
This is working for single sim. I am using one Jio sim and one Idea. Only able to call from one number at a time. If I put one Jio sim only, this process works for me. Together both sims are't working
Pls advice
Thanks .
Click to expand...
Click to collapse
Set Calling option to Always ask..
Keep Data Enabled for Roaming & Data to Jio sim..

CYB3R0ID694 said:
Set Calling option to Always ask..
Keep Data Enabled for Roaming & Data to Jio sim..
Click to expand...
Click to collapse
Works perfectly now...
One catch.. After every boot VT setting has gone we again have ro keep to high every time.
Can live with it
Thanks for the solution..

Verma's said:
Works perfectly now...
One catch.. After every boot VT setting has gone we again have ro keep to high every time.
Can live with it
Thanks for the solution..
Click to expand...
Click to collapse
That means after every reboot after to set VT settings to high, does it successfully change? or still gets stuck on unknown?? And after doing this this, is your volte now working fine even after reboot?
currently I'm using both Sims and volte is working fine but after reboot it breaks so I didn't reboot my ph since 3 days

mdfarazb2 said:
That means after every reboot after to set VT settings to high, does it successfully change? or still gets stuck on unknown?? And after doing this this, is your volte now working fine even after reboot?
currently I'm using both Sims and volte is working fine but after reboot it breaks so I didn't reboot my ph since 3 days
Click to expand...
Click to collapse
Yes.. It is working for me. If it doesn't for you.
, try the shortcut master way..
Mine it is working. I did rebooted my phone 4-5 times, did used both methods and every time I am able to use VOLTE and other sim simultaneously.
Let me know if anyone need step wise tutorial

Verma's said:
Yes.. It is working for me. If it doesn't for you.
, try the shortcut master way..
Mine it is working. I did rebooted my phone 4-5 times, did used both methods and every time I am able to use VOLTE and other sim simultaneously.
Let me know if anyone need step wise tutorial
Click to expand...
Click to collapse
Can you send me you apn's screenshot?
And yes Shortcut master way leads to force reboot
And is your vt call quality is set to high (Instead of having both Sims)?

mdfarazb2 said:
Can you send me you apn's screenshot?
And yes Shortcut master way leads to force reboot
Click to expand...
Click to collapse
[/QUOTE]
Give me your email I'd.
Shortcut Master is not force closing for me. It did ask to reboot the device but just ignore it and in 20-30. VOLTE signals is coming back

Give me your email I'd.
Shortcut Master is not force closing for me. It did ask to reboot the device but just ignore it and in 20-30. VOLTE signals is coming back[/QUOTE]
[email protected]
Just now did the steps..i.e. Enabled data roaming for jio.. created IMS apn...set VT to high.. rebooted ph.. volte gone:crying:

mdfarazb2 said:
Give me your email I'd.
Shortcut Master is not force closing for me. It did ask to reboot the device but just ignore it and in 20-30. VOLTE signals is coming back
Click to expand...
Click to collapse
[email protected]
Just now did the steps..i.e. Enabled data roaming for jio.. created IMS apn...set VT to high.. rebooted ph.. volte gone:crying:[/QUOTE]
Don't worry. . and pls check your email

Verma's said:
[email protected]
Just now did the steps..i.e. Enabled data roaming for jio.. created IMS apn...set VT to high.. rebooted ph.. volte gone:crying:
Click to expand...
Click to collapse
Don't worry. . and pls check your email[/QUOTE]
Man just now did the shortcut method... No force reboot/any reboot ... And I can see volte sign in the dialer again!!!
don't know if it'll stay like that even after reboots or not

mdfarazb2 said:
Don't worry. . and pls check your email
Click to expand...
Click to collapse
Man just now did the shortcut method... No force reboot/any reboot ... And I can see volte sign in the dialer again!!!
don't know if it'll stay like that even after reboots or not[/QUOTE]
I tried and on every reboot we have to repeat this. But don't worry, @codeworkx will find out solution and give a bugfree ROM. He is awsm.. Till then let's live up with this bug.

Volte calling issue after 7.1.1 update

I am facing a strange issue just after 7.1.1 update, The 4g calling icon on the status bar suddenly disappears sometimes and does not came back , even if I toggle the airplane mode several times it does not come back. In that situation I am not able to make calls from jio, the only way to get back 4g calling is by restarting the device which is very annoying as I have to restart my device 2-3 times a day for this issue?
Is anyone facing similar problem?
Is there a permanent solution for this issue?

didn't face any Volte issues till date ! Using JIO sim too
what was your mode of updating to Nougat ? i mean OTA or manual.
Did you reset the phone ? ( Both hard reset and software reset)

swaggy123 said:
didn't face any Volte issues till date ! Using JIO sim too
what was your mode of updating to Nougat ? i mean OTA or manual.
Did you reset the phone ? ( Both hard reset and software reset)
Click to expand...
Click to collapse
I flashed the stock image via cmd

No VoLTE issues here too.
I had too flashed the fastboot file for my device using ADB. There was no such issue present for me. Can you please explain when and in which circumstances you are facing this issue? We may be able to help you further then

rajdip92 said:
I flashed the stock image via cmd
Click to expand...
Click to collapse
BAckup data ! go to backup and reset in settings and reset your phone. Then once it shuts down , enter recovery and wipe data + cache
Hope it helps

d2211basu said:
I had too flashed the fastboot file for my device using ADB. There was no such issue present for me. Can you please explain when and in which circumstances you are facing this issue? We may be able to help you further then
Click to expand...
Click to collapse
Well it happens all of a sudden, for example yesterday night I went to sleep and today morning when I woke up I found volte calling missing & had to restart the device.

rajdip92 said:
Well it happens all of a sudden, for example yesterday night I went to sleep and today morning when I woke up I found volte calling missing & had to restart the device.
Click to expand...
Click to collapse
There's some problem with the sim or the SIM slot bro. Can you get it checked at the nearest authorised service centre?

d2211basu said:
There's some problem with the sim or the SIM slot bro. Can you get it checked at the nearest authorised service centre?
Click to expand...
Click to collapse
Well I don't think here is any issue with the sim or the sim card slot. I tried with another jio sim and the issue was there. I even did a factory reset and still the issue persists. there was no such issue on 6.0.1.
It does not make sense taking the device to service center as its out of warranty and they will charge a bomb for it. The moto g5 plus had similar issues and was fixed by an ota update. The last option left for me is to reflash the firmware and if that even does not solve which I am sure wont work I am going to sell the device.

Does anyone get enhanced volte option if we put the jio sim on second slot

rajdip92 said:
Does anyone get enhanced volte option if we put the jio sim on second slot
Click to expand...
Click to collapse
2nd slot never had volte since the beginning !

I never had volte issues ,,not earlier not now . Working fine

Just after I update to its latest version. The volte sign losses bt the 4g sign shows up. Now I cannot make calls or text msg via Jio by the sim works in another mobile. Is there any solution? Please help

OnePlus 2 VOLTE Sign Disappear

Hello Friends , I have OnePlus 2 ( oxygen OS 3.6.1) with JIO on my 1st sim slot . Many times the VOLTE icons disappears from the status bar although the signal is full on the sim and the data is working .After VOLTE icons disappears I cant make any call from the sim and I dont have any other choice than disabling the sim card and re enabling it to bring the VOLTE back which is quite frustrating . Any help on this ?

Try resetting the network settings within your sim card menu. Revert if issue persists.

Hey I already tried network resetting but nothing works

perhaps reflashing the modem firmware file of 3.6.0 or 3.6.1 will solve your issue. Link is in the lineage OS 15 thread. Search for the keywords you'll get it. If you don't I'll link.

Hey send link didn't find it plz

[email protected] said:
Hello Friends , I have OnePlus 2 ( oxygen OS 3.6.1) with JIO on my 1st sim slot . Many times the VOLTE icons disappears from the status bar although the signal is full on the sim and the data is working .After VOLTE icons disappears I cant make any call from the sim and I dont have any other choice than disabling the sim card and re enabling it to bring the VOLTE back which is quite frustrating . Any help on this ?
Click to expand...
Click to collapse
I am also facing this issue recently.
I Tried reflashing the OS to 3.6.0 and 3.5.6 but same issue still persists. I cleaned Data and cache too.
(Jio VOLTE is now only working in SIM1 slot. Previously it used to work in SIM2 slot too. Even after flashing to older OS, facing same issue)
No success yet.

ShomiNa said:
I am also facing this issue recently.
I Tried reflashing the OS to 3.6.0 and 3.5.6 but same issue still persists. I cleaned Data and cache too.
(Jio VOLTE is now only working in SIM1 slot. Previously it used to work in SIM2 slot too. Even after flashing to older OS, facing same issue)
No success yet.
Click to expand...
Click to collapse
chances that u'r using 2 simcards... remove one and power on /off then isert second sim !

[email protected] said:
Hey send link didn't find it plz
Click to expand...
Click to collapse
Is your problem solved? Coz I m facing the same issue for a while now.

Even I'm facing the same issue?
I have to remove and reinsert sim every 1-2 hours to get volte back

No calls Since VoLTE activated

Hello folks
as you read on the title of the thread,i cant make calls or send messages from my sim now ,and that because i used the command - - - 4636 - i don't remember wat i really changed but it's only data now cant use as normal sim until i switch my second sim as data so the first one works
i have lenovo k6 power nougat stock rom.
any methode to disable volte or reseting the signal band .... ????
help me please

hackstorm1989 said:
Hello folks
as you read on the title of the thread,i cant make calls or send messages from my sim now ,and that because i used the command - - - 4636 - i don't remember wat i really changed but it's only data now cant use as normal sim until i switch my second sim as data so the first one works
i have lenovo k6 power nougat stock rom.
any methode to disable volte or reseting the signal band .... ????
help me please
Click to expand...
Click to collapse
You have probably corrupted your EFS partition which has your baseband information.
You have to restore your baseband.
Check this out. It is for Lenovo K6 Note though the procedure is the same.
https://forum.xda-developers.com/k6-power/how-to/guide-restore-baseband-k6-note-imei-t4007861/
Thanks,
tfr.

ROM with working volte?

Does anyone have any success on flashing any rom with working volte for Sprint
Thanks

darko454 said:
Does anyone have any success on flashing any rom with working volte for Sprint
Thanks
Click to expand...
Click to collapse
All Roms support volte, if you have working volte in stock then Rom also get volte working. If for somewhat reason volte is not working, then flash stock ROM< get volte working<take a backup of efs and persist,<install custom ROM<check if volte working< if not restore the efs and persist, volte should have start working.

Thanks for the response can you please point me I the right direction
What instruction can I follow?
Thanks

darko454 said:
Thanks for the response can you please point me I the right direction
What instruction can I follow?
Thanks
Click to expand...
Click to collapse
Here are the steps
1) Take a backup of efs and persist from TWRP or from adb using this command
Code:
dd if=/dev/block/bootdevice/by-name/persist of=/sdcard/persist.img
2) Install Stock ROM using Lenovo moto smart assistant
3) Get volte working on Stock ROM.
4) Take a backup of efs and persist in TWRP
5) install the custom ROM you want
6) Check if volte working on custom ROM
7) if not restore the efs and persist backup from TWRP
8) You will get volte working on Potter.
Possible reason for Volte not working after above steps
1) your service provider won't support Volte for Potter.
2) your region won't have volte connection.
If volte is supported by service provider but Potter won't support Volte.
1) get volte working on stock rom with other services provider
2) insert your sim card in a supported volte device
3) get volte working on that device
4) once volte start working on a supported device
5) remove the sim card and insert in Potter
6) you will get volte working on Potter
Note:- this method is tested on Airtel SIM card which won't support Volte for Potter(Official) but this method got volte working, so I am not sure if it works for your Sim Card too.

riyan65 said:
Here are the steps
1) Take a backup of efs and persist from TWRP or from adb using this command
Code:
dd if=/dev/block/bootdevice/by-name/persist of=/sdcard/persist.img
2) Install Stock ROM using Lenovo moto smart assistant
3) Get volte working on Stock ROM.
4) Take a backup of efs and persist in TWRP
5) install the custom ROM you want
6) Check if volte working on custom ROM
7) if not restore the efs and persist backup from TWRP
8) You will get volte working on Potter.
Possible reason for Volte not working after above steps
1) your service provider won't support Volte for Potter.
2) your region won't have volte connection.
If volte is supported by service provider but Potter won't support Volte.
1) get volte working on stock rom with other services provider
2) insert your sim card in a supported volte device
3) get volte working on that device
4) once volte start working on a supported device
5) remove the sim card and insert in Potter
6) you will get volte working on Potter
Note:- this method is tested on Airtel SIM card which won't support Volte for Potter(Official) but this method got volte working, so I am not sure if it works for your Sim Card too.
Click to expand...
Click to collapse
thanks for the quick reply
i have restored stock rom from Moto smart assistant but cant find how to get volte working on stock rom.
thanks

darko454 said:
Here are the steps
1) Take a backup of efs and persist from TWRP or from adb using this command
thanks for the quick reply
i have restored stock rom from Moto smart assistant but cant find how to get volte working on stock rom.
thanks
Click to expand...
Click to collapse
If Potter support volte for sprint network, then on stock it will automatically get volte. But if your service provider didn't enable volte for your sim card then you won't get volte until they enabled it or you ask them. Try this to check if volte is enabled for you SIM card
1) Open Phone app and dial *#*#4636#*#*
2) select phone information
3) Check IMS service status
4) if voice over LTE is enabled, volte is enabled by your service provider.

riyan65 said:
If Potter support volte for sprint network, then on stock it will automatically get volte. But if your service provider didn't enable volte for your sim card then you won't get volte until they enabled it or you ask them. Try this to check if volte is enabled for you SIM card
1) Open Phone app and dial *#*#4636#*#*
2) select phone information
3) Check IMS service status
4) if voice over LTE is enabled, volte is enabled by your service provider.
Click to expand...
Click to collapse
thanks
under stock Oreo ROM
i can see the VoLTE but it is grayed out i cant modify
please help thanks
I spoke to a sprint tech agent and said that volte is activated on their end
Not sure what else to do, could it be a bad siim card
Should I take it to a sprint store
Any help thanks

darko454 said:
thanks
under stock Oreo ROM
i can see the VoLTE but it is grayed out i cant modify
please help thanks
I spoke to a sprint tech agent and said that volte is activated on their end
Not sure what else to do, could it be a bad siim card
Should I take it to a sprint store
Any help thanks
Click to expand...
Click to collapse
Put the SIM card in other device and check if you can get volte working on it, if no volte still, then it a problem of Sim Card, replace the SIM card with a new one.