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[Q] flash LYZ28E on Verizon N6?

I am using Verizon N6 on Tmobile and was wondering if I can flash the TMo ( LYZ28E ) on my phone to get wifi calling on Tmo.
Can somebody please confirm?

Update: I was able to flash LYZ288 TMo build on my Verizon N6 using nexus tool kit without any errors.
I can see Wifi calling option in the settings options now and I need to figure out how to test wifi calling actually works on the phone. Any suggestions?

the WiFi calling will only work if your provider provides support for WiFi calling, and Verizon does not. only tmobile will provide support for WiFi calling, and the fi network.

Provider of the phone or provider of the Sim? I'm using T-Mobile sim

simms22 said:
the WiFi calling will only work if your provider provides support for WiFi calling, and Verizon does not. only tmobile will provide support for WiFi calling, and the fi network.
Click to expand...
Click to collapse
Provider of the phone or provider of the Sim? I'm using T-Mobile sim on Verizon n6

stivelio said:
Provider of the phone or provider of the Sim? I'm using T-Mobile sim on Verizon n6
Click to expand...
Click to collapse
ahhh.. the provider of the sim. all US bought nexus 6 are identical, no matter where they were bought.
---------- Post added at 02:47 PM ---------- Previous post was at 02:46 PM ----------
stivelio said:
Update: I was able to flash LYZ288 TMo build on my Verizon N6 using nexus tool kit without any errors.
I can see Wifi calling option in the settings options now and I need to figure out how to test wifi calling actually works on the phone. Any suggestions?
Click to expand...
Click to collapse
you can put it into airplane mode, then turn on WiFi and try to make a call.

you can put it into airplane mode, then turn on WiFi and try to make a call.[/QUOTE]
Just tries this but didn't work. It gives me a message that I must turn airplane mode off or connect to wireless network even though I was connected to wifi

stivelio said:
Just tries this but didn't work. It gives me a message that I must turn airplane mode off or connect to wireless network even though I was connected to wifi
Click to expand...
Click to collapse
ok, on your lockscreen, does it say WiFi calling? and which radio are you using?

It should say T-Mobile wifi calling at the top of your lockscreen like this
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"lightbox_previous": "Previous",
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"lightbox_stop_slideshow": "Stop slideshow",
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"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
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chris6278 said:
It should say T-Mobile wifi calling at the top of your lockscreen like this View attachment 3346761
Click to expand...
Click to collapse
I see T-Mobile WiFi calling in under WiFi icon when I pull down my notification menu. Also I see 14R radio in settings. Does this mean WiFi calling won't actually work because it is a Verizon phone?

stivelio said:
I see T-Mobile WiFi calling in under WiFi icon when I pull down my notification menu. Also I see 14R radio in settings. Does this mean WiFi calling won't actually work because it is a Verizon phone?
Click to expand...
Click to collapse
it is a google phone, its just bought through Verizon. but that doesn't matter at all.

simms22 said:
it is a google phone, its just bought through Verizon. but that doesn't matter at all.
Click to expand...
Click to collapse
Ah ok. In that case I really don't know what else to do cuz phone seems to show latest radio and kernels along with WiFi calling label in notification

stivelio said:
Ah ok. In that case I really don't know what else to do cuz phone seems to show latest radio and kernels along with WiFi calling label in notification
Click to expand...
Click to collapse
I'm on tmobile, but aren't using all that's required for WiFi calling, so haven't tried myself. I know a few were having issues with it, so its not just you. but eventually they got it working, so I think you will too.

stivelio said:
I see T-Mobile WiFi calling in under WiFi icon when I pull down my notification menu. Also I see 14R radio in settings. Does this mean WiFi calling won't actually work because it is a Verizon phone?
Click to expand...
Click to collapse
If its saying wifi calling in your notification menu then it should be working. All nexus 6 no matter where you got it are the same. As long as your on T-Mobile then thats all that matters

chris6278 said:
If its saying wifi calling in your notification menu then it should be working. All nexus 6 no matter where you got it are the same. As long as your on T-Mobile then thats all that matters
Click to expand...
Click to collapse
Funny T-Mobile tech support won't even answer any of my questions because I brought the Nexus 6 over from Verizon. I can't get Wifi Calling working even though I am on the latest TMobile OTA. They claim they cannot provide support to devices not bought from T-Mobile. I'm currently stuck digging through XDA for a solution to my problem.

4G Data but no voLTE calls defaults 3g

Hello all,
Recently purchased this phone.
As stated in the title I get 4g but when making or receiving a call default to 3g. Immediately back to 4g as soon as call over.
I disabled region check and Enhanced 4G LTE Mode toggle appeared in Mobile Network Settings. I enabled and restarted.
Also went into phone info using *#*#4636#*#* and all flags for voLTE are on there as well.
Carrier: Consumer Cellular (T mobile sim)
Bands 2 and 4
Does anyone know how to resolve ?

"#"#86583#*#*

Have you enabled volte with your carrier?

laviniu_c said:
"#"#86583#*#*
Click to expand...
Click to collapse
Thanks but already tried it before posting.
Tried again and restarted .... still 3g on calls.

-Protos said:
Hello all,
Recently purchased this phone.
As stated in the title I get 4g but when making or receiving a call default to 3g. Immediately back to 4g as soon as call over.
I disabled region check and Enhanced 4G LTE Mode toggle appeared in Mobile Network Settings. I enabled and restarted.
Also went into phone info using *#*#4636#*#* and all flags for voLTE are on there as well.
Carrier: Consumer Cellular (T mobile sim)
Bands 2 and 4
Does anyone know how to resolve ?
Click to expand...
Click to collapse
-Protos said:
Thanks but already tried it before posting.
Tried again and restarted .... still 3g on calls.
Click to expand...
Click to collapse
Maybe this can help you:
Download and install 4G Only Network Mode from Google Play Store.
Modify advanced network convigoration by opening the secret settings:
Click on Open Secret Settings
Under Set Preffered Network Type, choose LTE ONLY
This will automatically force your phone to exclusively connect to the 4G LTE only network.

akpe said:
Have you enabled volte with your carrier?
Click to expand...
Click to collapse
I called them, they did something on their end so now calls start in 3g but go the 'H" after a few seconds.
Probably still not volte but an improvement.
My understanding is that volte calls have an "HD" for this phone

-Protos said:
Thanks but already tried it before posting.
Tried again and restarted .... still 3g on calls.
Click to expand...
Click to collapse
volte carrier check needs to be "disabled" btw
try switching to airplane mode and back. also make sure you have your sim in sim1!
what country/carrier are you on?
---------- Post added at 11:53 PM ---------- Previous post was at 11:50 PM ----------
-Protos said:
I called them, they did something on their end so now calls start in 3g but go the 'H" after a few seconds.
Probably still not volte but an improvement.
My understanding is that volte calls have an "HD" for this phone
Click to expand...
Click to collapse
H is hspda, that's not volte...

-Protos said:
My understanding is that volte calls have an "HD" for this phone
Click to expand...
Click to collapse
Yes, you're right. When volte is enabled you should see an HD icon next to your signal strength icon. Just like this:
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After your carrier enables volte you should reboot if you haven't already. Volte is used only with 4G, so after the reboot you should get the HD icon when you're connected on 4G. To test it out (or if you are still on 3G/H) do the following:
Press *#*#86583#*#* on dialer until carrier check is disabled. If it says enabled, just type it in again.
Then press *#*#4636#*#* on dialer to start the hidden menu. Go to the first tab, I believe it's called phone information, and scroll down where its says preferred network type. Note down the default value (it should restore on reboot and flight mode, but just in case) and select LTE (or 4G if it's called that) only. You will lose signal for a moment, and then you should be back running in 4G. Obviously, you need to be on a location with good 4G coverage.
Then, just make a call. If it gets through without dropping the data connection (4G symbol stays on), you're on volte. Go back to *#*#4636#*#* to restore your preferred network type, and enjoy

I tried everything posted so far but no luck.
I have a nexus 5x on with an identical sim on the same network/towers that shows me lte over the bars.
This phone only shows me 4G ..... is the phone capable of displaying lte ?
When selecting preferred network type lte only. It will drop the call.

LTE is 4G. Each phone uses different symbols, but it's the same. The fact that it drops the call probably means that volte is not enabled... weird. Have you contacted your carrier about it?

https://forum.xda-developers.com/mi-a2/how-to/guide-volte-t-mobile-yes-actually-t3869677
I just figured it out. Just follow the guide.

Thanks for the post Daha3ker ..... I will see if anyone else tries it before giving it a go.
I am quite sure at this point its a network issue as it is also happening on my Nexus 5x (LTE then H during call)

Confirmed it is a network issue. They are sending me ATT sims to try.
The tech support wasn't the brightest bulb, she kept trying to convince me I need to be on wifi to place an LTE call.
After some passive aggressive attempts to convince me she finally told me T-mobile does not support volte with them.

VoLTE depends of the carrier, it has to be enabled on his network equipments.
Some carriers enable it per phone line (they have to enable it for your line)
Moreover, some carriers restrict VoLTE for specific devices. Here in France, Orange enable VoLTE only for Apple and Samsung devices...

youl_junior said:
Moreover, some carriers restrict VoLTE for specific devices. Here in France, Orange enable VoLTE only for Apple and Samsung devices...
Click to expand...
Click to collapse
What if you just use a Samsung or Apple device to enable it?
Here in Greece, Cosmote also enables VoLTE only for specific devices, Samsung, Apple and Huawei. The Mi A2 isn't one of them. But I managed to... side-enable it. I just inserted my sim card in a Huawei device and sent the text to enable it. They enabled it in my sim, and of course it still works after I moved the sim back to the A2
Στάλθηκε από το Mi A2 μου χρησιμοποιώντας Tapatalk

akpe said:
What if you just use a Samsung or Apple device to enable it?
Here in Greece, Cosmote also enables VoLTE only for specific devices, Samsung, Apple and Huawei. The Mi A2 isn't one of them. But I managed to... side-enable it. I just inserted my sim card in a Huawei device and sent the text to enable it. They enabled it in my sim, and of course it still works after I moved the sim back to the A2
Στάλθηκε από το Mi A2 μου χρησιμοποιώντας Tapatalk
Click to expand...
Click to collapse
Orange say that it is available and automatically enabled on Apple devices, and on Samsung devices which were purchased in Orange stores. So I think there is something special in phone rom.

Problem resolved. Was a carrier issue.
Required an ATT sim and add a new Access Point
* Note if using Consumer Cellular you will need the ATT sim for Volte.
Tmobile does not support Volte on CC as relayed by tech.
Thanks to all who posted.

-Protos said:
Problem resolved. Was a carrier issue.
Required an ATT sim and add a new Access Point
* Note if using Consumer Cellular you will need the ATT sim for Volte.
Tmobile does not support Volte on CC as relayed by tech.
Thanks to all who posted.
Click to expand...
Click to collapse
I have MetroPCS Sim in miA2 does it support VOLTE ?

Thanks bro best solution

Wifi calling and Volte

Hi. So I was having trouble with calls, signal drops, very annoying whooshing noises and so on. When I contacted the carrier they said let's turn VOLTE THEN WIFI CALLING. my wife and I have the p20 pro CLT-LO4 and neither of our phones have an option for volte or wifi calling. Contacted carrier(Koodo) I'm in canada. They said well it's suppose to be there reset you phone and check again. No dice then press *#*#4935#*#* and it does nothing. They say it's enabled on there end and don't have a solution... I called Huawei and they took my serial number and model and told me that it's the carrier 100%....

try this.
Open phone settings > Wireless & networks > Mobile network > both VoLTE calls and Wi-Fi calling settings should be there.
if you can't find, it is because the carrier disabled it in the rom. Try to unlock bootloader, root and flash an international rom to get it back.

When I talked to the carrier they assured that it was unlocked.
If you have a link on how to preform the tasks you said ide definately give it a try
Thank you

One question tho is it possible to brick the phone? Reason I'm asking is my wife's phone is 8 months old but I just switched from my s9 to this one 2 days ago so i can tech bring it back and get a refund but the problem is there isn't any other phones offered besides the p30 pro that compare and I would have to pay $690 down plus 20 a month for 24 months where as p20pro was $0 down and 15 a month.

If the carrier supports it, then you should have the option in settings. In my case, when I bought the phone only one of the two carriers that I have in each sim card was supporting WiFi calling. Now that both support it, I have it in the settings. The problem that I have found with WiFi calling though is that if you start a phone call through WiFi and you move to a place with bad reception, then the call is dropping. Also, if you are on a WiFi call and you go to a place where the wifi has no reception whatsoever, then again the call drops, instead of switching to normal call. In other words, whatever the way you make the call, you have to finish it. There is no switching during the call; this became really frustrating, so I now switched it to mobile network preferred
Sent from my CLT-L29 using Tapatalk

Alot of misinformation about this on the net.
Regardless of what your carrier says this is in fact a carrier issue.
If you simply swap sim cards to another carrier that DOES support these features on all phones with no restrictions then it will show up in the settings.

sinnedone said:
Alot of misinformation about this on the net.
Regardless of what your carrier says this is in fact a carrier issue.
If you simply swap sim cards to another carrier that DOES support these features on all phones with no restrictions then it will show up in the settings.
Click to expand...
Click to collapse
Exactly, line one doesn't have that option but SIM 2 does .
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Sent from my EVR-L29 using Tapatalk

Limeybastard said:
Exactly, line one doesn't have that option but SIM 2 does .View attachment 4878505
Sent from my EVR-L29 using Tapatalk
Click to expand...
Click to collapse
This screenshot is from a Mate 20 X but the same thing shows up when I insert this sim into a P20 Pro.
(Oh....in the United States when you pop in a T-Mobile SIM you will have Volte toggle in settings but not on ATT)

sinnedone said:
This screenshot is from a Mate 20 X but the same thing shows up when I insert this sim into a P20 Pro.
(Oh....in the United States when you pop in a T-Mobile SIM you will have Volte toggle in settings but not on ATT)
Click to expand...
Click to collapse
T-Mobile SIM 1 , no volte toggle here thanks for the clarification. My post was primarily to reinstate your point about WiFi being carrier/SIM dependent.
Sent from my EVR-L29 using Tapatalk

quinnford said:
When I talked to the carrier they assured that it was unlocked.
If you have a link on how to preform the tasks you said ide definately give it a try
Thank you
Click to expand...
Click to collapse
I'll upload a video tutorial when i get back home tonight.

spiderx_mm said:
try this.
Open phone settings > Wireless & networks > Mobile network > both VoLTE calls and Wi-Fi calling settings should be there.
if you can't find, it is because the carrier disabled it in the rom. Try to unlock bootloader, root and flash an international rom to get it back.
Click to expand...
Click to collapse
hi i tried searching in google for the volte enable in my mobile device Huawei P20 Pro , my other sim says it is volte ready however the other sim volte radio button cant be seen i tried switching sims but everytime i switch sim the volte button will transfer leaving me a sim card tray with no volte does this mean that it is the carrier needs to enable volte? others say that i need to wait for update on my mobile device

My device has a model CLT-L29 Global version for Huawei P20 Pro EMUI version is 10.0.0 Android 10 and it says for this version there is no update for EMUI 11 so does this mean i can not use volte anymore or do i need to contact carrier for the volte to be enabled?

thanito said:
If the carrier supports it, then you should have the option in settings. In my case, when I bought the phone only one of the two carriers that I have in each sim card was supporting WiFi calling. Now that both support it, I have it in the settings. The problem that I have found with WiFi calling though is that if you start a phone call through WiFi and you move to a place with bad reception, then the call is dropping. Also, if you are on a WiFi call and you go to a place where the wifi has no reception whatsoever, then again the call drops, instead of switching to normal call. In other words, whatever the way you make the call, you have to finish it. There is no switching during the call; this became really frustrating, so I now switched it to mobile network preferred
Sent from my CLT-L29 using Tapatalk
Click to expand...
Click to collapse
I am also using CLT-L29 GLOBAL however only one sim has the wifi calling radio button enabled and hd calling but on sim 2 there is no volte calls radio button both sims are set to 4G i have tried switching sims but everytime i switch sims the sim that has volte calls radio button and wifi calling will move if i switch the sim cards the other sim tray no volte radio button will appear

LG V40 keeps dropping cellular and wifi connection

LG V40 keeps dropping cellular and wifi connection.. When ever I am connected to Wi-Fi data both the Wi-Fi and cellular network keeps dropping connection. If the phone is connected only by data network. it works fine. Have to put it on airplane mode then put on the Wi-Fi to work. This issues only happens with certain Sims. With others works great. The sims are not the issue because the sims were tested on other devices

A few things to check:
1) Make sure you have data roaming turned off.
2) In Wi-Fi settings, disable 'Auto connect Automatically connect to an available AT&T Wi-Fi HotSpot' (this applies to AT&T Rom only, disregard if you have cross-flashed).
3) In Wi-Fi settings, tap on three dots, and go into advanced settings and make sure 'Aggressive Mode' is not enabled.
4) In Developer Options, make sure 'Aggressive Wi-Fi to Cellular handover' is disabled.
5) In Developer Options, make sure 'Cellular data always active' is enabled.
6) In Network & Internet settings, go into 'Data Manager', make sure 'Limit mobile data usage' is disabled. Also, in same menu click on three dots and select option 'Restrict networks' just to check you don't have any Wi-Fi connections restricted.
7) There is a setting to 'avoid weak Wi-Fi signals', which in combination with bad cellular signal at your location could also be causing this problem. I just can't find this setting in Oreo (or perhaps it is reworded into one of the above), if you are on Pie, it might be there somewhere, look for it and disabled it if you find it.
8) If nothing above helps, consider resetting your network settings in same menu where you do factory reset.
Other than that, may be someone else can help further but I am pretty sure they'd wanna know if you're on Oreo or Pie. What your native hardware model is, and if you cross-flashed, which carrier KDZ you are on.
Edit: Also, was the phone ever opened to replace battery or do repairs? Wi-Fi and Cellular antennas are pretty much stickers that clasp on and go around between battery and back panel and sometimes after repairs they are not put back on properly and can result in weak signals.

Facing same issue on my indian lg v405ebw with vodafone sim when wifi is in use sim network often goes out and only turning airplane mode on off or restarting phone gets the network back.
If wifi is turned off no issue in network reception.
Vodafone Sim works fine in other phones and other networks work fine in v40 too.
Running latest android 9 march security patch firmware version 20d ind

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Lg v40
This is my settings

Am from the Caribbean. We have 3 network providers. It works perfect with digicel, but looses the signal with flow and inet. Could it be the network band. Inte and flow have the same network band. But digicel is different. What network band is carrier?

Wow
ohhuzoor said:
Facing same issue on my indian lg v405ebw with vodafone sim when wifi is in use sim network often goes out and only turning airplane mode on off or restarting phone gets the network back.
If wifi is turned off no issue in network reception.
Vodafone Sim works fine in other phones and other networks work fine in v40 too.
Running latest android 9 march security patch firmware version 20d ind
Click to expand...
Click to collapse
Am from the Caribbean. We have 3 network providers. It works perfect with digicel, but looses the signal with flow and inet. Could it be the network band. Inte and flow have the same network band. But digicel is different. What network band is carrier?

ohhuzoor said:
Facing same issue on my indian lg v405ebw with vodafone sim when wifi is in use sim network often goes out and only turning airplane mode on off or restarting phone gets the network back.
If wifi is turned off no issue in network reception.
Vodafone Sim works fine in other phones and other networks work fine in v40 too.
Running latest android 9 march security patch firmware version 20d ind
Click to expand...
Click to collapse
Settings
Mobile network
Network mode
Gsm/wcdma auto and error fixed

warmachine20 said:
Settings
Mobile network
Network mode
Gsm/wcdma auto and error fixed
Click to expand...
Click to collapse
Yeah, no point in having LTE enabled in the Caribbean. I used Lime and Digicel on T-Mobile and Verizon phones when I was living in Grenada for a while. You are right, phone bands need to be compatible with the carrier bands but in this case I think some of the bands might be software locked too. For compatible bands check on this website, for example Lime and Digicel bands for Grenada: https://www.frequencycheck.com/countries/grenada
Also, i think by default LG V40 do not have all the bands enabled, they get region locked depending on which region KDZ you are using. Depending on which KDZ you cross-flashed to, you can verify which of the bands that are enabled in the hidden menu. I did not have band selection sub-menu on my AT&T LG V40 and not sure if you will have this menu in your phone or not but doesn't hurt to check. Just be careful not to change any settings in hidden menu that you don't know about, you can really mess up your phone if start toggling random settings. You can dial *#546368#*405# in your dialer and go in 'Field Test' then 'Modem Settings' then 'LTE Band Selection' and can try enable all bands. Depending on which carrier phone you have, you may not have these options available in hidden menu as my phone didn't have these (until i cross-flash).

Question Any way to enable VoLTE and/or wifi calling for US carriers

Is there any way to enable VoLTE or wifi calling for US carriers. Maybe by rooting or adb commands? I'm using the x70 pro plus on tmobile and it's only showing H when making phone calls and I don't see any option to enable VoLTE or wifi calling.

Rapid bunny said:
Is there any way to enable VoLTE or wifi calling for US carriers. Maybe by rooting or adb commands? I'm using the x70 pro plus on tmobile and it's only showing H when making phone calls and I don't see any option to enable VoLTE or wifi calling.
Click to expand...
Click to collapse
Im using wifi calling, the option is under Mobile Network, SIM 1

DJorgio said:
Im using wifi calling, the option is under Mobile Network, SIM 1
Click to expand...
Click to collapse
I'm using the Chinese 512 gb version, I don't see that option. What version of the x70 pro plus do you have?

Rapid bunny said:
I'm using the Chinese 512 gb version, I don't see that option. What version of the x70 pro plus do you have?
Click to expand...
Click to collapse
That's the same version I have too, dual SIM - In Australia (perhaps it only shows what the SIM is capable of)?
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DJorgio said:
That's the same version I have too, dual SIM - In Australia (perhaps it only shows what the SIM is capable of)?
View attachment 5526861
Click to expand...
Click to collapse
If I reset my network settings the HD icon is shown in the status bar showing that VoLTE is enable but there is no toggle for the VoLTE in my settings.
Restarting my phone gets rid of the HD icon meaning the VoLTE is no longer enabled

Rapid bunny said:
If I reset my network settings the HD icon is shown in the status bar showing that VoLTE is enable but there is no toggle for the VoLTE in my settings.
Restarting my phone gets rid of the HD icon meaning the VoLTE is no longer enabled
Click to expand...
Click to collapse
Yes, and if you toggle VoLTE setting, you get the icon back. But this is not a useful discovery. The fact is that with or without the icon, I never really have VoLTE. But the answer may be in provider, my phone is not listed as enabled. With iPhone, which is listed, and the same provider VoLTE is active. I'll be travelling this month, have two different sims and see what happened.

piskr said:
Yes, and if you toggle VoLTE setting, you get the icon back. But this is not a useful discovery. The fact is that with or without the icon, I never really have VoLTE. But the answer may be in provider, my phone is not listed as enabled. With iPhone, which is listed, and the same provider VoLTE is active. I'll be travelling this month, have two different sims and see what happened.
Click to expand...
Click to collapse
There is no VoLTE toggle in my settings. The HD icon just indicates if my phone is connected to the VoLTE service.
Reseting my network settings enables the VoLTE on my phone but it is disabled when I restart my phone and only shows H when I make calls until I reset my network settings.

DJorgio said:
That's the same version I have too, dual SIM - In Australia (perhaps it only shows what the SIM is capable of)?
View attachment 5526861
Click to expand...
Click to collapse
Does your settings have a VoLTE toggle?

Rapid bunny said:
If I reset my network settings the HD icon is shown in the status bar showing that VoLTE is enable but there is no toggle for the VoLTE in my settings.
Restarting my phone gets rid of the HD icon meaning the VoLTE is no longer enabled
Click to expand...
Click to collapse
But your provider supports VoLTE and you do have a Chinese x70 pro+? What about VoWIFI, I can see that you have it enabled, does it work?
Try to update phone app if it is possible or clear cash and data of it. I have this menu but so far VoLTE doesn't really work.
And one more question. Why would you need VoLTE if you have VoWIFI enabled?

piskr said:
But your provider supports VoLTE and you do have a Chinese x70 pro+? What about VoWIFI, I can see that you have it enabled, does it work?
Try to update phone app if it is possible or clear cash and data of it. I have this menu but so far VoLTE doesn't really work.
And one more question. Why would you need VoLTE if you have VoWIFI enabled?
Click to expand...
Click to collapse
My carrier tmobile support VoLTE. I attached a screenshot of what my sim settings look like. I don't have a toggle for VoLTE or VoWIFI but VoLTE is enabled if I reset my network settings until I restart my phone.
I need VoLTE to work because in a few months the 2g and 3g bands for my carrier are getting shut shutdown and I will need VoLTE to make or receive calls.

Rapid bunny said:
My carrier tmobile support VoLTE. I attached a screenshot of what my sim settings look like. I don't have a toggle for VoLTE or VoWIFI but VoLTE is enabled if I reset my network settings until I restart my phone.
I need VoLTE to work because in a few months the 2g and 3g bands for my carrier are getting shut shutdown and I will need VoLTE to make or receive calls.
Click to expand...
Click to collapse
Ok, sorry about VoWIFI, it was another guy who published this option. Have you tried to reset phone app data and cache? Have you checked APN? have you ever tried to enable 5g and roaming? Tried to contact the t mobile service about VoLTE?
There is one more options to enable and change some phone options but it's very delicate, hence be really careful with it. It's a service number *#*#4636#*#*
At least shows you what options are really enabled on your phone.

I just got a sim card from a friend who has VoLTE from long ago. I tried it and can confirm that I didn't even get an option to enable VoLTE. Therefore, the option from my sim is fake, and it's obvious that VoLTE doesn't work on this phone right now.
I hope that Vivo would address and fix the issue soon.

VoLTE is finally working on the new update but still missing the toggles

The VoLTE issue lies with Vivo, not with your carrier. When you put a carrier SIM into your phone it contains unique information that tells the phone who your carrier is and the phone then configures the APN settings automatically. You cannot edit them. In Origin OS Ocean you can open System/etc/apn-config.xml and you will see a list of every carrier in the world and read what default APN settings the operating system automatically configures the APN for that carrier to be.
I have the Vivo X Note with the same Origin OS Ocean firmware as the X70pro. My Canadian carrier supports VoLTE and WiFi calling and their tech support manually added the IMEI of my phone to the equipment list for my line and assured me that VoLTE and WiFi calling are provisioned for the line, but neither of those toggles appear in my Mobile Networks/Sim settings, because the APN that Vivo applies for my carrier doesn't support VoLTE. If I put the same SIM into my Samsung Note 20 Ultra 5g or my Huawei Mate 20 X and look at the APN settings, they permit VoLTE and the toggle and feature works on those phones - so it is not the carrier, or the SIM - it is Vivo and their default APN settings for your carrier.
I have a strong 5g signal here, and I can download and stream or do VoIP calls at 5g, but when I place a voice call it drops to 3g or H. That isn't an issue here in Canada, because we have kept our 3g voice network up and running. When I travel to the US, however, I can't place calls because without VoLTE enabled voice calls drop to 3g - which no longer exists in the United States. Someone needs to convince Vivo to change the apn-config.xml file to reflect APNs for North American carriers to ensure VoLTE is possible. I would just edit the .xml file myself, but you can't save changes to an .xml file without root, and we can't root because Vivo won't unlock the bootloader for Origin OS Ocean devices.

This is what my APN needs to look like to enable VoLTE:
<apn carrier="Rogers Internet"
mcc="302"
mnc="720"
apn="ltemobile.apn"
mmsproxy="mmsproxy.rogers.com"
mmsport="80"
mmsc="http://mms.gprs.rogers.com"
type="default,supl,mms"
protocol="IPV4V6"
roaming_protocol="IP"
/>
<apn carrier="Rogers Tethering"
mcc="302"
mnc="720"
apn="ltedata.apn"
type="dun"
protocol="IPV4V6"
roaming_protocol="IP"
But unfortunately, this is what Vivo has for the default APN for my carrier in their System/Etc/apn-config.xml:
<apn carrier="Rogers Internet"
mcc="302"
mnc="720"
apn="ltemobile.apn"
type="default,mms,agps,supl,fota,hipri"
mmsproxy="mmsproxy.rogers.com"
mmsc="http://mms.gprs.rogers.com"
mmsport="80"
mvno_match_data="ROGERS"
mvno_type="spn"
protocol="IPV4V6"
roaming_protocol="IP"
/>
<apn carrier="Rogers Tethering"
mcc="302"
mnc="720"
apn="ltedata.apn"
type="dun"
mvno_match_data="ROGERS"
mvno_type="spn"
protocol="IPV4V6"
roaming_protocol="IP"

frcraig said:
The VoLTE issue lies with Vivo, not with your carrier. When you put a carrier SIM into your phone it contains unique information that tells the phone who your carrier is and the phone then configures the APN settings automatically. You cannot edit them. In Origin OS Ocean you can open System/etc/apn-config.xml and you will see a list of every carrier in the world and read what default APN settings the operating system automatically configures the APN for that carrier to be.
I have the Vivo X Note with the same Origin OS Ocean firmware as the X70pro. My Canadian carrier supports VoLTE and WiFi calling and their tech support manually added the IMEI of my phone to the equipment list for my line and assured me that VoLTE and WiFi calling are provisioned for the line, but neither of those toggles appear in my Mobile Networks/Sim settings, because the APN that Vivo applies for my carrier doesn't support VoLTE. If I put the same SIM into my Samsung Note 20 Ultra 5g or my Huawei Mate 20 X and look at the APN settings, they permit VoLTE and the toggle and feature works on those phones - so it is not the carrier, or the SIM - it is Vivo and their default APN settings for your carrier.
I have a strong 5g signal here, and I can download and stream or do VoIP calls at 5g, but when I place a voice call it drops to 3g or H. That isn't an issue here in Canada, because we have kept our 3g voice network up and running. When I travel to the US, however, I can't place calls because without VoLTE enabled voice calls drop to 3g - which no longer exists in the United States. Someone needs to convince Vivo to change the apn-config.xml file to reflect APNs for North American carriers to ensure VoLTE is possible. I would just edit the .xml file myself, but you can't save changes to an .xml file without root, and we can't root because Vivo won't unlock the bootloader for Origin OS Ocean devices.
Click to expand...
Click to collapse
Hi sorry my question is off topic, but I want to get the Vivo X Note. Is possible to change de default launcher in the phone with Origin OS? Thanks

With the Origin OS Ocean firmware you can change the default launcher, but only after registering a Vivo Account (you can do this by e-mail - you don't need a Mainland China phone number). Sign into your Vivo Account (at the top of your devices "settings") and then go to Settings/Security/More Security Settings/ Replace the System Launcher. I'm using Nova as default launcher on my Vivo X Note.

frcraig said:
The VoLTE issue lies with Vivo, not with your carrier. When you put a carrier SIM into your phone it contains unique information that tells the phone who your carrier is and the phone then configures the APN settings automatically. You cannot edit them. In Origin OS Ocean you can open System/etc/apn-config.xml and you will see a list of every carrier in the world and read what default APN settings the operating system automatically configures the APN for that carrier to be.
I have the Vivo X Note with the same Origin OS Ocean firmware as the X70pro. My Canadian carrier supports VoLTE and WiFi calling and their tech support manually added the IMEI of my phone to the equipment list for my line and assured me that VoLTE and WiFi calling are provisioned for the line, but neither of those toggles appear in my Mobile Networks/Sim settings, because the APN that Vivo applies for my carrier doesn't support VoLTE. If I put the same SIM into my Samsung Note 20 Ultra 5g or my Huawei Mate 20 X and look at the APN settings, they permit VoLTE and the toggle and feature works on those phones - so it is not the carrier, or the SIM - it is Vivo and their default APN settings for your carrier.
I have a strong 5g signal here, and I can download and stream or do VoIP calls at 5g, but when I place a voice call it drops to 3g or H. That isn't an issue here in Canada, because we have kept our 3g voice network up and running. When I travel to the US, however, I can't place calls because without VoLTE enabled voice calls drop to 3g - which no longer exists in the United States. Someone needs to convince Vivo to change the apn-config.xml file to reflect APNs for North American carriers to ensure VoLTE is possible. I would just edit the .xml file myself, but you can't save changes to an .xml file without root, and we can't root because Vivo won't unlock the bootloader for Origin OS Ocean devices.
Click to expand...
Click to collapse
I have the same issue with x80 pro running funtouch. Please how do I edit the xml?
I thought it was vivo...I contacted them and they made go thru recording the screen and sending logs. They never helped. Just kept saying please send the logs. I'm rooted so if you can help me I would greatly appreciate it.

diopskill said:
I have the same issue with x80 pro running funtouch. Please how do I edit the xml?
I thought it was vivo...I contacted them and they made go thru recording the screen and sending logs. They never helped. Just kept saying please send the logs. I'm rooted so if you can help me I would greatly appreciate it.
Click to expand...
Click to collapse
If you are rooted with Magisk try the VoLTE enabler module.
diopskill said:
I have the same issue with x80 pro running funtouch. Please how do I edit the xml?
I thought it was vivo...I contacted them and they made go thru recording the screen and sending logs. They never helped. Just kept saying please send the logs. I'm rooted so if you can help me I would greatly appreciate it.
Click to expand...
Click to collapse
If you are rooted with Magisk, try this module https://github.com/edgd1er/voenabler/releases/tag/v1.8

frcraig said:
If you are rooted with Magisk try the VoLTE enabler module.
If you are rooted with Magisk, try this module https://github.com/edgd1er/voenabler/releases/tag/v1.8
Click to expand...
Click to collapse
Thanks,
I have volte, just no 5g icon. I'm on TMO. Is possible to add 5g option under preferred network thru editing?