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EE / Three UK VoLTE

Hi.
I have a EU Xzp single sim version. I flashed 3UK firmware but don't get band 20 access or volte. Anyone here flashed onto 3uk or EE and get volte? Anyone getting volte with carrier branded device in UK?

Sony Xperia XZ Premium
How did you flash your Xperia XZ Premium, i want to flash mine but flashtool is still not compatible, i am able to download the Rom but the flashtool does not recognize the phone when its time to flash. Please help.
Thanks,
NB

NunoB512 said:
How did you flash your Xperia XZ Premium, i want to flash mine but flashtool is still not compatible, i am able to download the Rom but the flashtool does not recognize the phone when its time to flash. Please help.
Thanks,
NB
Click to expand...
Click to collapse
You use the new flash tool:
https://forum.xda-developers.com/crossdevice-dev/sony/progress-newflasher-xperia-command-line-t3619426

Op, can you check what configuration your phone has loaded? To do this type this in dialer *#*#7378423#*#* then "Service Info" then "Software info". there should be row called Current modem Config: What does it read?
From the XZ Premium available modem configurations i can see following UK stuff available.
amss_fsg_maple_ee_ims_tar
amss_fsg_maple_hutch_uk_tar
amss_fsg_maple_hutch_uk_volte_vowifi_tar
amss_fsg_maple_telefonica_uk_ims_tar
amss_fsg_maple_telefonica_uk_tar
amss_fsg_maple_virgin_uk_tar
amss_fsg_maple_vodafone_uk_tar
amss_fsg_maple_vodafone_uk_volte_vowifi_tar
For the 3UK to work from phone side, you probably need amss_fsg_maple_hutch_uk_volte_vowifi_tar loaded in current modem config.
Do you have volte calls option available under Mobile network settings?
If everything there, but not working still then need to get feedback from 3UK if they need to switch it on for XZ Premium

VeixES said:
Op, can you check what configuration your phone has loaded? To do this type this in dialer *#*#7378423#*#* then "Service Info"
If everything there, but not working still then need to get feedback from 3UK if they need to switch it on for XZ Premium
Click to expand...
Click to collapse
hi with EE firmware there is current modem config there is: amss_fsg_maple_ee_ims_tar.mbn and EE Wifi Calling and EE VoLTE works
hi with 3UK firmware- the correct modem config is there-> but no Band 20, No VoLTE (and no Wifi Calling- looking at 3UK website -> even the 3UK XZP doesn't have Wifi calling support).
I note the EE current firmware security update is from June'17, 3UK latest firmware is April'17.
Maybe things will improve when 3 UK update their firmware
A big downside of XZP seems to be you can't lock onto a specific band... (you can fix LTE but not the band)

If the correct region firmware is flashed and correct config loaded then volte should be good to go from phone side.
Operator can still limit volte per device model or firmware version.
Comparing the April firmware and June, there are no changes in modem config files.
But there is hope that new build is the qualifying factor for 3UK.
O2 UK has volte and vowifi active with the June update also
LTE band locking will be available when good root support arrives.
PS. If you feel like experimenting then you can take the latest EE firmware and switch out the oem.sin from 3UK firmware and flash it.
This should give you newest base and 3uk oem config.

I have just flashed the 3 firmware. I can confirm that I am not getting band 20 or volte.
The option to turn it on is not in settings either.
Current modem config:
/system/etc/customization/modem/amss_fsg_maple_hutch_uk_tar
Hopefully the June update will fix it.
Edit: I can't test adding the three oem bit into the ee firmware as I am going away now and can't flash my phone. But will try and test when I get back if no one has (or the newer firmware is available) by then

VeixES said:
Op, can you check what configuration your phone has loaded? To do this type this in dialer *#*#7378423#*#* then "Service Info" then "Software info". there should be row called Current modem Config: What does it read?
From the XZ Premium available modem configurations i can see following UK stuff available.
amss_fsg_maple_ee_ims_tar
amss_fsg_maple_hutch_uk_tar
amss_fsg_maple_hutch_uk_volte_vowifi_tar
amss_fsg_maple_telefonica_uk_ims_tar
amss_fsg_maple_telefonica_uk_tar
amss_fsg_maple_virgin_uk_tar
amss_fsg_maple_vodafone_uk_tar
amss_fsg_maple_vodafone_uk_volte_vowifi_tar
For the 3UK to work from phone side, you probably need amss_fsg_maple_hutch_uk_volte_vowifi_tar loaded in current modem config.
Do you have volte calls option available under Mobile network settings?
If everything there, but not working still then need to get feedback from 3UK if they need to switch it on for XZ Premium
Click to expand...
Click to collapse
I purchased Amazon UK unlocked version however I don't get WiFi calling and I have the following.
I'm with EE and only ever had EE in the phone but my modem is O2?
Current Modem Config /system/etc/customization/modem/ amss.fsg maple telefonica uk tar.mbn
How odd? Can I change without unlocking?

Northern-Loop said:
How odd? Can I change without unlocking?
Click to expand...
Click to collapse
Yes you can flash the official EE firmware without having to unlock.
Get the firmware via xperifirm then flash using newflasher

indesisiv said:
Yes you can flash the official EE firmware without having to unlock.
Get the firmware via xperifirm then flash using newflasher
Click to expand...
Click to collapse
Any ideas why unlocked version has o2 modem?

modem is loaded via detection of sim, but volte settings come from oem.sin that is in the regional firmware.

radii said:
Hi.
I have a EU Xzp single sim version. I flashed 3UK firmware but don't get band 20 access or volte. Anyone here flashed onto 3uk or EE and get volte? Anyone getting volte with carrier branded device in UK?
Click to expand...
Click to collapse
Have you tried ringing three and asking them? If so what did they say?

Three uk: buy it from their store

radii said:
Three uk: buy it from their store
Click to expand...
Click to collapse
So no help there then
Edit: I just rang 3 and they said ring sony support who I suspect will say it's not their fault

VeixES said:
modem is loaded via detection of sim, but volte settings come from oem.sin that is in the regional firmware.
Click to expand...
Click to collapse
In that case it is loading the wrong modem.
The modem that is needed is in the folder but not loaded.
amss_fsg_maple_hutch_uk_volte_vowifi_tar.mbn
Whereas the one that is loaded is amss_fsg_maple_hutch_uk_tar.mbn

if you could alter files in oem.sin then this could be changed.
Do we have a method to repack .sin files? I know how to "unsin" and how to extract .ext4 but repacking is unknown to me.
Also it is possible to select the configuration manually via app. Might not work with non-rooted devices.
Check the tutorial here https://forum.xda-developers.com/crossdevice-dev/sony/enabling-volte-xperia-z2-xperia-z3-t3438505
root, build.prop changes and shortcutmaker is needed.
Also maybe the 3uk june update will change which configuration is loaded will check when it drops.

Anybody managed to connect to band 20 on EE with the latest firmware update?

Not sure if I've connected or not with the latest update, but since then I no longer see 4G+ (which is the norm for other EE phones, but for some reason I had it on the XZ Premium until now).
It is still using CA and VoLTE is still working, so I assume band 20 is still usable.

Cellmapper https://play.google.com/store/apps/details?id=cellmapper.net.cellmapper will show you which band you are connected to.
My Sonyss show 4G+ when there is Carrier Aggregation in use. Should see LTE-A in Cellmapper when that is the case.

olisun39 said:
Anybody managed to connect to band 20 on EE with the latest firmware update?
Click to expand...
Click to collapse
Having returned from the Lake District I can confirm I had use of band 20 with no problems, and it made a big difference to coverage and speed. Many places in excess of 100Mbps with band3+20!

Get VoLTE working on H8314/H8324 XZ2 Compact in India on Airtel and Jio

I spent quite a bit of time figuring out how to make the VoLTE work on Airtel and Jio in India on a USA edition H8314 phone.
Sony for some reason doesn't bundle all operators VoLTE configuration in all images, not sure why, typically not the case with other high end phones. And they have region specific bundles or OEM customization.
I solved the problem by taking parts of the regular dual sim ZX2 firmware H8296_Customized IN_1314-9934_52.0.A.3.202_R4B, which has the VoLTE configuration for Airtel and Reliance, and flashing it on my phone. VoLTE works! No issues noticed so far (will update if I notice anything).
Here are the steps:
1. Install XperiFirm
2. download the Indian version of firmware for XZ2 dual, in my case H8296_Customized IN_1314-9934_52.0.A.3.202_R4B
3. download and install newflasher
4. From the downloaded and extracted set of files in XperiFirm download directory, copy the following to another directory
oem_other_X-FLASH-CUST-B6B5.sin
oem_X-FLASH-CUST-B6B5.sin
5. Copy the newflasher also to the same directory, now this directory should have 3 files
6. turn off the phone,
8. enter flashmode (vol down + connect USB cable to PC)
9. run the newflasher, in the directory you prepaired in step 4 and 5
10. Unplug from USB after the flashing is done and restart your phone, it should work with VoLTE on airtel as well as Jio. On airtel it may take a few minutes before the calls actually start going on VoLTE but it works perfectly fine.​
This doesn't require bootloader unlock so all phone function would remain good. Feel Free to ask questions, the version of firmware on my XZ2C is 52.0.A.3.163 USA generic.

So this works good with Indian and US networks ?
ahzam said:
I spent quite a bit of time figuring out how to make the VoLTE work on Airtel and Jio in India on a USA edition H8314 phone.
Sony for some reason doesn't bundle all operators VoLTE configuration in all images, not sure why, typically not the case with other high end phones. And they have region specific bundles or OEM customization.
I solved the problem by taking parts of the regular dual sim ZX2 firmware H8296_Customized IN_1314-9934_52.0.A.3.202_R4B, which has the VoLTE configuration for Airtel and Reliance, and flashing it on my phone. VoLTE works! No issues noticed so far (will update if I notice anything).
Here are the steps:
1. Install XperiFirm
2. download the Indian version of firmware for XZ2 dual, in my case H8296_Customized IN_1314-9934_52.0.A.3.202_R4B
3. download and install newflasher
4. From the downloaded and extracted set of files in XperiFirm download directory, copy the following to another directory
oem_other_X-FLASH-CUST-B6B5.sin
oem_X-FLASH-CUST-B6B5.sin
5. Copy the newflasher also to the same directory, now this directory should have 3 files
6. turn off the phone,
8. enter flashmode (vol down + connect USB cable to PC)
9. run the newflasher, in the directory you prepaired in step 4 and 5
10. Unplug from USB after the flashing is done and restart your phone, it should work with VoLTE on airtel as well as Jio. On airtel it may take a few minutes before the calls actually start going on VoLTE but it works perfectly fine.​
This doesn't require bootloader unlock so all phone function would remain good. Feel Free to ask questions, the version of firmware on my XZ2C is 52.0.A.3.163 USA generic.
Click to expand...
Click to collapse

beastonprowl said:
So this works good with Indian and US networks ?
Click to expand...
Click to collapse
I haven't traveled to USA since, but I do not see why it won't work.

thanks ahzam for sharing this. My XZ2 is on Customized Version CE1 and VoLTE didn't work with o2 Germany. I downloaded the DE firmware with xperifirm and flashed the 2 files you mentioned via newflasher v13. Reboot and everything is working fine now!
Thanks again,
drewster

Hi ahzam,
I have bought H8296 unlocked international version from USA.
I am also not able to use the VoLTE in India on airtel idea or jio.
Will this firmware help me to get the VoLTE.
After doing so, will I be getting future official Sony updates or it will be rooted device and Xperia support will end?
Can you please help?
Regards
Akhilesh

FantasticBeast007 said:
Will this firmware help me to get the VoLTE.
Click to expand...
Click to collapse
Yes, this should work.
FantasticBeast007 said:
After doing so, will I be getting future official Sony updates or it will be rooted device and Xperia support will end?
Click to expand...
Click to collapse
For me updates still work.
Your device will not be rooted after that. So in my opinion you will not loose your warranty.
Greetz

Thank you for confirming
I will try this and keep you posted if this works

Thank you Guys
It worked and now I get VoLTE on both Airtel and Jio.
However for Airtel it takes some extra 10 seconds to get VoLTE.
One problem I have noticed after this. I received an official xperia update but got an error "Could not Install" while installing this update.
Do you know how to resolve this issue?
Regards
Akhilesh

FantasticBeast007 said:
One problem I have noticed after this. I received an official xperia update but got an error "Could not Install" while installing this update.
Do you know how to resolve this issue?
Regards
Akhilesh
Click to expand...
Click to collapse
For me all updates worked so far without any error. I think i've read somewhere, that the update can be done via Sony companion. (But for me companion never worked in any way^^)

ahzam said:
I spent quite a bit of time figuring out how to make the VoLTE work on Airtel and Jio in India on a USA edition H8314 phone.
Sony for some reason doesn't bundle all operators VoLTE configuration in all images, not sure why, typically not the case with other high end phones. And they have region specific bundles or OEM customization.
I solved the problem by taking parts of the regular dual sim ZX2 firmware H8296_Customized IN_1314-9934_52.0.A.3.202_R4B, which has the VoLTE configuration for Airtel and Reliance, and flashing it on my phone. VoLTE works! No issues noticed so far (will update if I notice anything).
Here are the steps:
1. Install XperiFirm
2. download the Indian version of firmware for XZ2 dual, in my case H8296_Customized IN_1314-9934_52.0.A.3.202_R4B
3. download and install newflasher
4. From the downloaded and extracted set of files in XperiFirm download directory, copy the following to another directory
oem_other_X-FLASH-CUST-B6B5.sin
oem_X-FLASH-CUST-B6B5.sin
5. Copy the newflasher also to the same directory, now this directory should have 3 files
6. turn off the phone,
8. enter flashmode (vol down + connect USB cable to PC)
9. run the newflasher, in the directory you prepaired in step 4 and 5
10. Unplug from USB after the flashing is done and restart your phone, it should work with VoLTE on airtel as well as Jio. On airtel it may take a few minutes before the calls actually start going on VoLTE but it works perfectly fine.
This doesn't require bootloader unlock so all phone function would remain good. Feel Free to ask questions, the version of firmware on my XZ2C is 52.0.A.3.163 USA generic.
Click to expand...
Click to collapse
Can we get VoLTE for any region with these configurations? Like EMEA etc.

nos1609 said:
Can we get VoLTE for any region with these configurations? Like EMEA etc.
Click to expand...
Click to collapse
you should be able to get VoLTE for any region by following this process, you need to extract the files from right version of the bundle for that region.

hi, actually I'm using xz2 premium (H8166) which isn't supported by the jio sim and airtel volte so can I try this method? Thanks.
updated : actually, it's working for xz2 premium so no problem in Volte... so rite now Im using airtel and jio both working fine... but mobile restarts for network optimization while changing mobile data from sim1 to sim2 or sim2 to sim1. Anyways thanks Alot for this awesome tip man.. I really felt bad for my xz2 premium now I'm really happy. You saved my money. Thanks again.

drewsterAndi said:
For me all updates worked so far without any error. I think i've read somewhere, that the update can be done via Sony companion. (But for me companion never worked in any way^^)
Click to expand...
Click to collapse
It also did not worked via xperia companion.
However I ran software repair using xperia companion and it worked, Now I have Volte + All the Sony Security updates
---------- Post added at 03:48 AM ---------- Previous post was at 03:44 AM ----------
ganesh_84s said:
hi, actually I'm using xz2 premium (H8166) which isn't supported by the jio sim and airtel volte so can I try this method? Thanks.
updated : actually, it's working for xz2 premium so no problem in Volte... so rite now Im using airtel and jio both working fine... but mobile restarts for network optimization while changing mobile data from sim1 to sim2 or sim2 to sim1. Anyways thanks Alot for this awesome tip man.. I really felt bad for my xz2 premium now I'm really happy. You saved my money. Thanks again.
Click to expand...
Click to collapse
Yes the restarting is known issue and Sony does is intentionally. I have XZ2 and planning to buy XZ2 Premium also in coming months.

ganesh_84s said:
hi, actually I'm using xz2 premium (H8166) which isn't supported by the jio sim and airtel volte so can I try this method? Thanks.
updated : actually, it's working for xz2 premium so no problem in Volte... so rite now Im using airtel and jio both working fine... but mobile restarts for network optimization while changing mobile data from sim1 to sim2 or sim2 to sim1. Anyways thanks Alot for this awesome tip man.. I really felt bad for my xz2 premium now I'm really happy. You saved my money. Thanks again.
Click to expand...
Click to collapse
First of all, I would like to say Big thanks who share this Procedure, Now I am able to use Volte Functionality
Now I have the same problem while changing sim1 to sim2 to and vice versa but before did volte procedure it was working fine in both sim, so as per my opinion this problem related somewhere Volte functional
I bought this Cell from the Middle East, So in Middle east it was working fine while changing Sim1 & Sim2 Procedure and even in India it was working
So if someone does R&D than might be it is a curable issue, I don't know why Sony did a big mistake nowadays even Oops, Vivo, all Chinese implements successfully these things, even sony dosnt implement Auto Hide status bar in Compact Series Cell

sunnymodh said:
First of all, I would like to say Big thanks who share this Procedure, Now I am able to use Volte Functionality
Now I have the same problem while changing sim1 to sim2 to and vice versa but before did volte procedure it was working fine in both sim, so as per my opinion this problem related somewhere Volte functional
I bought this Cell from the Middle East, So in Middle east it was working fine while changing Sim1 & Sim2 Procedure and even in India it was working
So if someone does R&D than might be it is a curable issue, I don't know why Sony did a big mistake nowadays even Oops, Vivo, all Chinese implements successfully these things, even sony dosnt implement Auto Hide status bar in Compact Series Cell
Click to expand...
Click to collapse
yes, same point before volte its working fine but now restarting issue and I can't update to latest security update too... but I think it's not big issue.. let me flash it anyway restart issue is seriously curable.

sunnymodh said:
First of all, I would like to say Big thanks who share this Procedure, Now I am able to use Volte Functionality
Now I have the same problem while changing sim1 to sim2 to and vice versa but before did volte procedure it was working fine in both sim, so as per my opinion this problem related somewhere Volte functional
I bought this Cell from the Middle East, So in Middle east it was working fine while changing Sim1 & Sim2 Procedure and even in India it was working
So if someone does R&D than might be it is a curable issue, I don't know why Sony did a big mistake nowadays even Oops, Vivo, all Chinese implements successfully these things, even sony doesn't implement Auto Hide status bar in Compact Series Cell
Click to expand...
Click to collapse
Today I discovered 3 more problems
1)After Install Volte Firmware, Because in India no Official launched XZ2C , after install we can not get Firmware Update
2)If you Switch Mobile data between two sims, Cell will restart automatically
3)In Setting->Display you can not get Super Vivid Mode or Professional Mode for better color reproduction
So if anyone tells me XZ2C officially launched which country with Volte Function, if we get an answer than we can solve all the issue

Fact. reset
sunnymodh said:
Today I discovered 3 more problems
1)After Install Volte Firmware, Because in India no Official launched XZ2C , after install we can not get Firmware Update
2)If you Switch Mobile data between two sims, Cell will restart automatically
3)In Setting->Display you can not get Super Vivid Mode or Professional Mode for better color reproduction
To get back this, just factory re-set and will get this options. Anyway It is not working any VoLTE (it's just showing the LTE symbol and option in seeting, in reality your call is routed on 3g/2g. ) you can verify this by selecting 4g only and try calling.
So if anyone tells me XZ2C officially launched which country with Volte Function, if we get an answer than we can solve all the issue
Click to expand...
Click to collapse
>>> 1)After Install Volte Firmware, Because in India no Official launched XZ2C , after install we can not get Firmware Update
How did you find this? As far as I see there is no new firmware came in this recent times. Correct me if I am wrong.
>>>3)In Setting->Display you can not get Super Vivid Mode or Professional Mode for better color reproduction
To get back this, just factory re-set and will get this options. Anyway It is not working on any VoLTE (it's just showing the LTE symbol and option in settings, in reality your call is routed on 3g/2g. ) you can verify this by selecting 4g only and try calling.

tvk73 said:
>>> 1)After Install Volte Firmware, Because in India no Official launched XZ2C , after install we can not get Firmware Update
How did you find this? As far as I see there is no new firmware came in this recent times. Correct me if I am wrong.
>>>3)In Setting->Display you can not get Super Vivid Mode or Professional Mode for better color reproduction
To get back this, just factory re-set and will get this options. Anyway It is not working on any VoLTE (it's just showing the LTE symbol and option in settings, in reality your call is routed on 3g/2g. ) you can verify this by selecting 4g only and try calling.
Click to expand...
Click to collapse
For Latest Software Update Just Use Software Xperifirm, you will get all country latest Software Info and also you can download
Germany, India, Russia you will get Volte Services, Right now I am using Volte Function in Sony XZ2C

FantasticBeast007 said:
It also did not worked via xperia companion.
However I ran software repair using xperia companion and it worked, Now I have Volte + All the Sony Security updates
---------- Post added at 03:48 AM ---------- Previous post was at 03:44 AM ----------
Yes the restarting is known issue and Sony does is intentionally. I have XZ2 and planning to buy XZ2 Premium also in coming months.
Click to expand...
Click to collapse
Can you tell me which Firmware you are using, because I am not able to get any OTA Update

https://xpericheck.com/device/H8296
Current build is 52.0.A.11.3

VoLTE T-Mobile USA Working on H8324 Xperia XZ2 Compact Dual Stock

I managed to get VoLTE working on the xz2cd (H8324) with T-Mobile USA using the xz3 (H8416) USA firmware oem-*.sin files.
Thank you to all the others that figured out the process details so all I had to do was try every combination - see the other VoLTE threads in this forum to guide you on the actual steps. Also thanks to Androxyde and Igoreisberg for the flash & download tools!
I have this working with the H8324_Customized NOBA_1313-6167_52.0.A.8.25_R5B firmware, I happen to choose, replacing only the oem-*.sin files from the XZ3 H8416_Customized US_1316-4522_52.0.A.8.25_R10B firmware. When you set both lines to "LTE (preferred)" and you'll be able to make LTE calls on both lines, however it may only show [HD] calling on the line you configured last I think but it'll be VoLTE on both.
Enjoy and thanks again to all the other threads that guided me through this long but worthwhile trial process. I wish the carriers didn't make LTE VoLTE provisioning difficult, why didn't they just make it universal like 3G.
Note: I was able to separately get Wifi-Calling to appear using the H8276_Freedom CA_1313-8876_52.0.A.8.25_R3B oem-*.sin files but it wasn't functional on T-Mobile USA - I think someone with a little bit more knowledge might be able to get this to work, unless you can point me in the right direction.
Someone please make an open firmware thin/light/compact dual SIM phone with Wifi-Calling/VoLTE (removable battery a bonus)!

Do you think the files would be the same on the H8314 US edition? i'm assuming you need to be rooted for this to work?

Hey Mike, Can you please share(download link) OEM*.sin files of USA firmware for Volte Settings

Im wondering if we can flash the OEM files from the US XZ1 Compact to get T-Mobile VOLTE and Wifi calling? I would try it myself but I cant find one of these phones at a reasonable price. If I do I will try and report back if anyone cares. I am glad at least VOLTE seems to work with this workaround.

VoLTE provisioned on XZ2 but calls are still made over 3G
I’ve done the same for my XZ2 (not compact, H8266). The VoLTE button is now active, but calls are still making over 3G. Any suggestion?

I just talked to a T-mobile specialist, and he confirmed that my phone should work and no need to register or do anything if it supports all bands!!! As he told me "only check for compatibility" and mine is compatible! ?

Were you ever able to get this working? New XZ2 owner and of course I bought this within a week is the announcement about all non VoLTE devices being kicked off in January..

Is there anyway to get volte working for tmobile on the h8314?

XZ2C H8314 VoLTE working on T-Mobile USA
colonelcack said:
Is there anyway to get volte working for tmobile on the h8314?
Click to expand...
Click to collapse
Yes VoLTE works but no VoWIFI with the following method:
Download USA Customized for XZ2C (H8314) and use only the two oem...sin files from XZ3 (H8416) USA Customized. (overwrite the two files in the XZ2C stack)
Use newflasher tool. (I deleted all .ta files and userdata file to avoid losing existing data)
To put the phone into flash mode, power off, hold the vol down button and plug in your usb cable while holding the button until you get a dim green light.
The device will show up in device manager under USB and you can run newflasher as administrator. Please search for a tutorial - there are many that are very good with screenshots of the files you want to move into the newflasher folder.
Some hangups I ran into when setting up and flashing -
Installing flashtool drivers required disabling driver signature enforcement on win10 (Flash device did not show up in usb in device manager until this was done)
For safety, after the flashtool driver install, I performed a repair on xperia companion app in case of any driver conflicts.
Running newflasher again, I got an error: Unable to open ./boot/Apollo_XBootConfig_MiscTA.ta! after multiple system files had been flashed.
But not to worry, the command window said the phone exited flash mode, but got error 933 - unable to sync. - No worries though, just make sure the command window states the phone is out of flash mode somewhere, disconnect your cable and power up your phone.
Then you will get an android message saying your carrier settings will update after reboot and the phone may reboot.
Once rebooted, enter *#*#4636#*#* in your phone dialer app (Takes 30 seconds after fresh boot for the menu to come up) , select phone information, and select LTE only (Note: VoLTE Provisioned will have the slider set to the right, but grayed out - Before the re-flash, the slider was set to the left and grayed out), reboot again. (If you click the 3 dots and look at IMS Status, you will see IMS status Registered, VoLTE Available and UT interface Available - Before the re-flash status was not registered and not available)
Now when you make a call, it will say "HD" in your dialer while on a call and your signal indicator will no longer say 3G when calling.
VoWIFI does not work, but you can use whatapp or something else like googleFi if its a must have, but in my case, I did not want to have to buy a new phone in January when they turn off 3G - Phones are too darn big now anyways and I love the display on this phone.
Notices will go out starting AUG 4th if your phone is marked as not supported using T-Mobile IMEI BYOD online tool - Their tool said my phone does not support VoLTE (Not fully true - It just does not have Band 71 for Long Range VoLTE but will use Band 4(66) just fine, I cannot confirm band 12 even though the phone spec supports it. It appears only Short range VoLTE is working on the phone unless someone else can confirm with this method, My Band 12 tower is behind a hill and i am 20 miles from it) T-mobile currently does not have a whitelist like AT&T, so If the UE (User Equipment - ie. phone) is configured properly, the network will handle the rest. I hope this practice does not change.
The advantage to using this method, is you are using completely stock USA files - My bootloader is locked and i am not rooted BTW. My XZ2C is only carrier unlocked.
The build number of both Roms I used was the same 52.1.A.3.49 XXX - Good Luck.
BTW - Some people were asking what modem config is working with VoLTE on T-mobile USA - to get the modem setting type *#*#7378423#*#* and in the service menu select software info, under Current modem config the value reads:
row/tmobile/vl/us

XZ1 oem files on XZ2 for VOLTE and VOWIFI calls.
nicogu said:
Im wondering if we can flash the OEM files from the US XZ1 Compact to get T-Mobile VOLTE and Wifi calling? I would try it myself but I cant find one of these phones at a reasonable price. If I do I will try and report back if anyone cares. I am glad at least VOLTE seems to work with this workaround.
Click to expand...
Click to collapse
You will need to try this. I was not so brave. The reason is the difference in the build IDs and oem.sin file names between the XZ1 (Old) and XZ2 (Current as of July USA Customized builds).
Mixing and matching files is easier when you are doing so off the same build ID. Thats why V0LTE worked on my XZ2 using XZ3 oem.sin files, they were from the same build ID and had the same names even though the sizes were slightly different.
It may work if the format of the oem.sin file did not change between the XZ1 builds and XZ2 Builds. The more different the builds, the higher the risk of something going wrong.
---------- Post added at 01:31 AM ---------- Previous post was at 01:28 AM ----------
gigili said:
I’ve done the same for my XZ2 (not compact, H8266). The VoLTE button is now active, but calls are still making over 3G. Any suggestion?
Click to expand...
Click to collapse
Enter *#*#4636#*#* in your phone dialer app, select phone information, and select LTE only - Reboot, if you cant make calls after that something else is wrong.
---------- Post added at 01:33 AM ---------- Previous post was at 01:31 AM ----------
hitemup92 said:
Were you ever able to get this working? New XZ2 owner and of course I bought this within a week is the announcement about all non VoLTE devices being kicked off in January..
Click to expand...
Click to collapse
Got this to work, no VoWIFI though - look further down the thread.

depsilon said:
Yes VoLTE works but no VoWIFI with the following method:
Download USA Customized for XZ2C (H8314) and use only the two oem...sin files from XZ3 (H8416) USA Customized. (overwrite the two files in the XZ2C stack)
Use newflasher tool. (I deleted all .ta files and userdata file to avoid losing existing data)
To put the phone into flash mode, power off, hold the vol down button and plug in your usb cable while holding the button until you get a dim green light.
The device will show up in device manager under USB and you can run newflasher as administrator. Please search for a tutorial - there are many that are very good with screenshots of the files you want to move into the newflasher folder.
Some hangups I ran into when setting up and flashing -
Installing flashtool drivers required disabling driver signature enforcement on win10 (Flash device did not show up in usb in device manager until this was done)
For safety, after the flashtool driver install, I performed a repair on xperia companion app in case of any driver conflicts.
Running newflasher again, I got an error: Unable to open ./boot/Apollo_XBootConfig_MiscTA.ta! after multiple system files had been flashed.
But not to worry, the command window said the phone exited flash mode, but got error 933 - unable to sync. - No worries though, just make sure the command window states the phone is out of flash mode somewhere, disconnect your cable and power up your phone.
Then you will get an android message saying your carrier settings will update after reboot and the phone may reboot.
Once rebooted, enter *#*#4636#*#* in your phone dialer app (Takes 30 seconds after fresh boot for the menu to come up) , select phone information, and select LTE only (Note: VoLTE Provisioned will have the slider set to the right, but grayed out - Before the re-flash, the slider was set to the left and grayed out), reboot again. (If you click the 3 dots and look at IMS Status, you will see IMS status Registered, VoLTE Available and UT interface Available - Before the re-flash status was not registered and not available)
Now when you make a call, it will say "HD" in your dialer while on a call and your signal indicator will no longer say 3G when calling.
VoWIFI does not work, but you can use whatapp or something else like googleFi if its a must have, but in my case, I did not want to have to buy a new phone in January when they turn off 3G - Phones are too darn big now anyways and I love the display on this phone.
Notices will go out starting AUG 4th if your phone is marked as not supported using T-Mobile IMEI BYOD online tool - Their tool said my phone does not support VoLTE (Not fully true - It just does not have Band 71 for Long Range VoLTE but will use Band 12 just fine) T-mobile currently does not have a whitelist like AT&T, so If the UE (User Equipment - ie. phone) is configured properly, the network will handle the rest. I hope this practice does not change.
I made the mistake of calling sony and t-mobile for support and they both kept blaming each other, the reason they don't know why VoLTE does not work on some phones is they really don't know enough about their network or the basebands in the phone or the software build process and details about android sin files - as they should not either cause if the network engineers, device manufacturers and software developers all do their job and stick to industry standard practices, it will just work anyway.
The advantage to using this method, is you are using completely stock USA files - My bootloader is locked and i am not rooted BTW. My XZ2C is only carrier unlocked.
The build number of both Roms I used was the same 52.1.A.3.49 XXX - Good Luck.
BTW - Some people were asking what modem config is working with VoLTE on T-mobile USA - to get the modem setting type *#*#7378423#*#* and in the service menu select software info, under Current modem config the value reads:
row/tmobile/vl/us
Click to expand...
Click to collapse
Thank you so much for the detailed instructions! Only one question... Where do I download these files from? And the tool? Can you link me...
Sorry it's been a long time since I've done any xda stuff

H8314 Flash tools
colonelcack said:
Thank you so much for the detailed instructions! Only one question... Where do I download these files from? And the tool? Can you link me...
Sorry it's been a long time since I've done any xda stuff
Click to expand...
Click to collapse
I dont have direct links, but here is an excellent walkthrough that calls out all the tools -
https://www.xperiablog.net/2018/01/...-firmware-for-xperia-xz-premium-xz1-and-more/
Search for flashtool on XDA there should be links for that, but you only install the drivers from it, not the tool.
You also need the xperia companion software download from sony website for any missing drivers from flashtool.
Search XDA for newflasher, thats what you will actually flash with - https://forum.xda-developers.com/cr...gress-newflasher-xperia-command-line-t3619426
the firmware download utility is xperifirm software - https://forum.xda-developers.com/cr...xperifirm-xperia-firmware-downloader-t2834142

depsilon said:
H8314 Flash tools
I dont have direct links, but here is an excellent walkthrough that calls out all the tools -
https://www.xperiablog.net/2018/01/...-firmware-for-xperia-xz-premium-xz1-and-more/
Search for flashtool on XDA there should be links for that, but you only install the drivers from it, not the tool.
You also need the xperia companion software download from sony website for any missing drivers from flashtool.
Search XDA for newflasher, thats what you will actually flash with - https://forum.xda-developers.com/cr...gress-newflasher-xperia-command-line-t3619426
the firmware download utility is xperifirm software - https://forum.xda-developers.com/cr...xperifirm-xperia-firmware-downloader-t2834142
Click to expand...
Click to collapse
It's been a while but wanted to thank you for taking the time to write out these steps. I finally took a shot with the incoming shutdown of 3g for my XZ2, but unfortunately it did not work. Similar to what gigili said, while VoLTE appears to be provisioned the calls are dropping to 3g/HSPA like they originally were. After setting to "LTE Preferred" and rebooting, calls would not be made at all. I also saw "Unknown" under the Modem Config, and from what you said it should reference T-Mobile after flashing the OEM sin files.
I tried this using the latest firmware available on XperiFirm for the XZ2 (Customized US H8266 - my device is H8276) and the XZ3, which I used to grab the two OEM sin files. The firmware is 52.1.A.3.137.
Using UnSin, I unpacked both "oem_X-FLASH-CUST-B6B5.sin" files in both firmwares, and under modem-config there are a bunch of folders, and each one seems to have a conf files pointing to "mcfg_sw/generic/row/tmobile/vl/us/mcfg_sw.mbn."
I read in another thread that T-Mobile maybe has some way of blocking this workaround now, but I'm not entirely sure if that is true? Totally understand if you've moved on from the device as it's been a while, but am admittedly curious if there's a specific firmware version that this works on I could try to salvage the device.

Volte xz2/xz2 p/xz3 solved

Samir solanki said:
Volte xz2/xz2 p/xz3 solved
Click to expand...
Click to collapse
Details on exactly how?

I will create complete guide thread for the same

Samir solanki said:
I will create complete guide thread for the same
Click to expand...
Click to collapse
Thanks I'll watch for it

I am working to bring support for T-Mobile VoLTE on the xz2c to LineageOS 18.1. As of this writing, official LineageOS builds for this device do not support VoLTE unless it was already enabled and working in the stock firmware.
I have submitted some patches which may resolve the issue for TMO and probably other carriers as well. They work for me, but testing has been limited. If you are interested in using LineageOS instead of the stock ROM, and you are willing and able to build LOS yourself on linux, consider giving my patchset a try. Please read the patch description fully before attempting a build: you will need to obtain and mount some additional files first. The LineageOS wiki has additional instructions for creating a build environment.
EDIT: My patch is part of official LOS 18.1 starting with nightly 20220401. There is no need to build it yourself.

cbs228 said:
---
Click to expand...
Click to collapse
You are a saint for working on this. I bought a H8324 XZ2c recently and was super disappointed it didn't work, so I am back to my XZ1c. Super frustrated. If you ever get a pre-compiled ROM, I would love to try. In the meantime I will try to compile it myself in the coming days despite my technical illiteracy.
If that doesn't end up working, what stock firmware is available with T-Mobile VoLTE enabled and working, so I could step up from that to Lineage? Considering how old the other solutions for trying to get VoLTE working, I am hesitant to try any especially funny business of switching old firmware files from other phones around.

xperiaperson42069 said:
If that doesn't end up working, what stock firmware is available with T-Mobile VoLTE enabled and working, so I could step up from that to Lineage?
Click to expand...
Click to collapse
As far as I am aware there isn't any stock firmware that works "out of the box." The xz2c is listed as "unsupported" by t-mobile, which probably means there isn't any sort of stock ROM out there that works. Sometimes carriers do release "branded" ROMs, but there's nothing like that for this device AFAIK.
LinageOS is designed to be installed "on top" of an existing stock ROM. If you attempt to install it after you have flashed another distro (like an AOSP build), you will likely just make a brick. If you do end up bricking your device, do not despair. You can use Emma to restore your device to factory condition. Emma is available on the Sony Developer World website, and there are many guides available for it.

Solved- activate VOLTE (via root)?

Has anybody tried to activate VOLTE via PDC/QPST? I tried it, but no luck, because of errors at PDC.
I used this: https://www.xda-developers.com/how-to-enable-t-mobile-volte-vowifi-on-asus-smartphones-root/

I got it to work and even saw the VOLTE logo at the top. However....Wifi would not stay toggled on and the phone dialer would crash everytime you made a call.

wud_e said:
I got it to work and even saw the VOLTE logo at the top. However....Wifi would not stay toggled on and the phone dialer would crash everytime you made a call.
Click to expand...
Click to collapse
What where your steps? QPST used?
On Android 11 the volte.apk doesn't work anymore. So I can't bring the phone in PDC mode.

Seosam said:
What where your steps? QPST used?
On Android 11 the volte.apk doesn't work anymore. So I can't bring the phone in PDC mode.
Click to expand...
Click to collapse
Yeah I just realized that as well. I didn't use QPST just unrooted and then the app which unlocked VOLTE, VOWIFI and another option. I switched to Android 11, rooted and discovered that the apk no longer works for me.

I finally got it working. Tomorrow I will write a tutorial.

Seosam said:
I finally got it working. Tomorrow I will write a tutorial.
Click to expand...
Click to collapse
Here is the guide:
[Guide] activate Volte on Android 11 (root)
Finally I got it working on ww_30.40.30.96 on German carrier O2. I used most of the Guide from @HomerSp : https://forum.xda-developers.com/t/guide-enabling-volte-vowifi-v2.4028073/ requirements: adb for PC QPST latest EFS Tools from JohnBel...
forum.xda-developers.com

How To Guide [TMO] OOS/COS DATA FIX

TO CLARIFY THIS IS A ROOT ONLY FIX​After gaining root install given module.
Data is now retained. Even after reboot(s).
No empty slot or waiting.
Issue is TMO variant is showing muli sim.
So props were added to make it like a conversion to single sim....
Yes module works for both models.
Install & enjoy
Extract and pull it apart if interested .
Please give amazing thanks
to @twinnfamous for building module & bringing this data/sim nightmare to an end ​

Can confirm this worked and solved my stupid "no sim" error after upgrading from 11.10.10 global to c44.

Worked perfectly on TMobile converted to global. With the issue of having no signal after 12 update.
Thank you @twinnfamous for making the module and thank you @Libra420T for sharing !! You both saved my A$$!

Is this the only way to get data working? I have a NA global variant that doesn't support dual SIM and seems to have the same issue. Honestly really liking ColorOS besides this... I usually don't root but if I don't have a choice, I guess that's what I'll do.

Thanks much. This worked perfectly after I figured out how to root C.62!

Libra420T said:
TO CLARIFY THIS IS A ROOT ONLY FIX​After gaining root install given module.
Data is now retained. Even after reboot(s).
No empty slot or waiting.
Issue is TMO variant is showing muli sim.
So props were added to make it like a conversion to single sim....
Yes module works for both models.
Install & enjoy
Extract and pull it apart if interested .
Please give amazing thanks
to @twinnfamous for building module & bringing this data/sim nightmare to an end ​
Click to expand...
Click to collapse
thanks so much! I reflashed with msm multiple times and then kept upgrading to 12 since I thought I was doing something wrong, this fixed the SIM issue. now working great!

Hey dear my device OnePlus 9 T-Mobile
After rollback to stock T-Mobile
By unbrick msm tools
Stock T-Mobile not like first time
Sim card always disconnected and reconnected . Any solution?

This is support a Indian firmware?

badlucky said:
Hey dear my device OnePlus 9 T-Mobile
After rollback to stock T-Mobile
By unbrick msm tools
Stock T-Mobile not like first time
Sim card always disconnected and reconnected . Any solution?
Click to expand...
Click to collapse
You need to make sure that the msm tool manager is for your version that shipped with your phone, as well as the right android version number. Only then will you be able to generate a modem from your service provider.
If that doesn't work, I would try to msm to different versions of your T-Mobile vairent (LE2117). You should have rolled back to like 11.2.2 unless you have the Indian version. Idk what the first version was. my guess is that you used an msm tool that didn't include the Indian T-Mobile vairents.

Dear . I'm use msm to flash global firmware then im rollback to T-Mobile
This file sim card fix only on global firmware? Or for both (glo & India ) .
? Any new T-Mobile msm tools ?

Libra420T said:
TO CLARIFY THIS IS A ROOT ONLY FIX​After gaining root install given module.
Data is now retained. Even after reboot(s).
No empty slot or waiting.
Issue is TMO variant is showing muli sim.
So props were added to make it like a conversion to single sim....
Yes module works for both models.
Install & enjoy
Extract and pull it apart if interested .
Please give amazing thanks
to @twinnfamous for building module & bringing this data/sim nightmare to an end ​
Click to expand...
Click to collapse
Hey dear . Update to a12 last version c63 with ota update or local update?

Phoenix47 said:
Will it work on coloros 13 open beta ?
Click to expand...
Click to collapse
Yes it does. Beware that you may lose VoLTE, 5G, and WiFi calling though.

Phoenix47 said:
I don't even use any of them.
Click to expand...
Click to collapse
What carrier do you have? I had to go back to OOS because no US carrier works right without VoLTE now. Couldn’t make or receive calls unless my phone was on 3G (T-Mobile). Went back to OOS and then switched to my 12 Pro Max. Waiting for the Pixel 7 Pro announcement to decide if I’m going to that or getting a 14 Pro Max and saying goodbye to Android (again - my OnePlus 9 is the first Android I had since 2017 when I switched). All I know is I’m over this device.

dual sim will work?
sim issues solved from Android 13?