No VoLTE on Sprint V40 crossflashed to US firmware - LG V40 Questions & Answers

Hey, I have successfully flashed a Sprint LG V40 v405ua to US firmware 20g but VoLTE is not working. I am on Tmobile network and every time I make a phone call it switches from LTE to H. I heard Tmobile will be moving all phone calls to VoLTE in the middle of 2022. How can I enable VoLTE? Am I missing something? Thanks!

megadrive007 said:
Hey, I have successfully flashed a Sprint LG V40 v405ua to US firmware 20g but VoLTE is not working. I am on Tmobile network and every time I make a phone call it switches from LTE to H. I heard Tmobile will be moving all phone calls to VoLTE in the middle of 2022. How can I enable VoLTE? Am I missing something? Thanks!
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if you have access to the OP section, try to change it in cust.prop ro.vendor.lge.build.target_operator = OPEN to TMO

megadrive007 said:
Hey, I have successfully flashed a Sprint LG V40 v405ua to US firmware 20g but VoLTE is not working. I am on Tmobile network and every time I make a phone call it switches from LTE to H. I heard Tmobile will be moving all phone calls to VoLTE in the middle of 2022. How can I enable VoLTE? Am I missing something? Thanks!
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I'd suggest looking at the apn settings. That should be working (volte) without any system modifications.

I checked the APN settings and they are all correct. I am using US firmware version 20g, should I try using an earlier one like 20f? What versions are wokring for you? thanks

megadrive007 said:
I checked the APN settings and they are all correct. I am using US firmware version 20g, should I try using an earlier one like 20f? What versions are wokring for you? thanks
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I don't have a v40 anymore but remember any version I tried of us open cross flashed to my at&t would work no problem. I remember my carrier mint mobile required you to select 'vowifi' in the account to get that to work. But volte always worked.
you might want to consider joining the v40 tele grp see if they can further assist. Maybe also consider calling t-mo, re your account may not be provisioned for volte? Not sure that's even possible but why not check anyway?

If it is like AT&T does whitelisting, ROM does not matter, but IMEI.

Related

Does Android M for N6 support T-Mobile band 12 ?

So it looks like new Nexus phones are not supported yet, and its also reported that you look band 12 with M and Project Fi. So does it work on Tmo?
Yes. I'm on T-Mo with a stock N6 running Android 6.0 and LTE discovery (app) is showing lte band 12 right now.
Android M doesn't support any bands. It's hardware.
danarama said:
Android M doesn't support any bands. It's hardware.
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Dan, are you saying we don't need to wait for the update that T-Mobile says it will have ready for us later this week?
http://www.tmonews.com/2015/10/t-mobile-to-begin-pushing-nexus-6-android-6-0-update-this-week/
JimSmith94 said:
Dan, are you saying we don't need to wait for the update that T-Mobile says it will have ready for us later this week?
http://www.tmonews.com/2015/10/t-mobile-to-begin-pushing-nexus-6-android-6-0-update-this-week/
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The problem with an OTA is that it can only update a specific build. The normal OTA everyone else will get will not be able to update a t-mobile rom, so t-mobile will have to release their own.
Bands themselves for LTE are hardware in the SoC.
As for WiFi calling, that's built into Marshmallow..my understanding is you just need the "my tmo" app from play or something.
But yes, if you want to receive an OTA then you'll have to wait, but you should also be able to flash the system.img and boot.img
danarama said:
The problem with an OTA is that it can only update a specific build. The normal OTA everyone else will get will not be able to update a t-mobile rom, so t-mobile will have to release their own.
Bands themselves for LTE are hardware in the SoC.
As for WiFi calling, that's built into Marshmallow..my understanding is you just need the "my tmo" app from play or something.
But yes, if you want to receive an OTA then you'll have to wait, but you should also be able to flash the system.img and boot.img
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Thank you sir! I'm rooted, so I plan to update manually with fastboot anyway. I'm seeing conflicting reports from others that have manually updated about WiFi calling working or not, and band 12 being available or not. Guess I'll wait another day or two and see how it shakes out.
I am a stock non rooted T-mobile user and i upgraded to Marshmallow using the standard image that google posted. everything works, LTE and wifi calling included. I have had no issues so far.
I'm running stock factory 6.0 rooted with twrp and T-Mobile WiFi calling works perfect. Thanks marshmallow
Sent from my Nexus 6 using Tapatalk
.A.J. said:
Yes. I'm on T-Mo with a stock N6 running Android 6.0 and LTE discovery (app) is showing lte band 12 right now.
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Thanks. Are u on latest build? Fi users reporting that M killed band 12 for them on N6
Band12 data support is removed for Fi users in the M radio because Fi will not support T-Mobile's proprietary VoLTE. So, no band12 data with the Fi SIM installed.
If you run M on your N6 with a T-mobile SIM in, you do get band12 ?
Sent from my VS985 4G using Tapatalk

VoLTE not working on T-mobile Note 4 on JIO

Hi members!
I own an officially unlocked SM-N910T mobile (updated to latest MM 6.0.1) and currently using it in India. I can use 4g LTE for data but VoLTE doesn't work on my phone.
My network operator JIO provides LTE/VoLTE on Band 3, 5 and 40. I have enabled VoLTE from Settings > Calls > Call settings but no joy
VoLTE is enabled on my SIM and I can use it on another mobile.
I have been trying to understand what could be the issue over last 2 weeks but without any satisfactory answer from anyone.
So, I am wondering:
1. Is it because I don't have Indian CSC on my T-mobile phone? Is it even possible to flash Indian CSC on this device?
2. Is it because my device IMEI is 'NOT -INDIAN IMEI" and hence not supported? Customer care gives me more confusing answers - sometimes they say my phone is compatible for VoLTE and some say only Indian devices are supported.
3. Is something still locked to TMOBILE even after the official unlock?
Any answers are really appreciated from the any of you!
Cheers and thanks in advance!
Kamaldev.kd said:
Hi members!
I own an officially unlocked SM-N910T mobile (updated to latest MM 6.0.1) and currently using it in India. I can use 4g LTE for data but VoLTE doesn't work on my phone.
My network operator JIO provides LTE/VoLTE on Band 3, 5 and 40. I have enabled VoLTE from Settings > Calls > Call settings but no joy
VoLTE is enabled on my SIM and I can use it on another mobile.
I have been trying to understand what could be the issue over last 2 weeks but without any satisfactory answer from anyone.
So, I am wondering:
1. Is it because I don't have Indian CSC on my T-mobile phone? Is it even possible to flash Indian CSC on this device?
2. Is it because my device IMEI is 'NOT -INDIAN IMEI" and hence not supported? Customer care gives me more confusing answers - sometimes they say my phone is compatible for VoLTE and some say only Indian devices are supported.
3. Is something still locked to TMOBILE even after the official unlock?
Any answers are really appreciated from the any of you!
Cheers and thanks in advance!
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It may be a regional thing. My 910t uses volte on straight talk in the states with an att sim with no issues. Surprised me actually.
Same problem for me too.. I too own N910T.. Volte is enabled but Call failed error comes again nd again..... Can Anyone please help out....
did anyone found answer for this question?
jio VoLTE in t-mobile note 4
anantharam3 said:
did anyone found answer for this question?
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https://forum.xda-developers.com/showpost.php?p=70484835&postcount=21
devbiju said:
https://forum.xda-developers.com/showpost.php?p=70484835&postcount=21
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Hi devbiju, thanks for pointing me to the post, but more help is appreciated. I did change my rom to RAM-rom. how do i set the IMS-APN. whenever i add the IMS apn, it doesn't stick
Please help.
anantharam3 said:
Hi devbiju, thanks for pointing me to the post, but more help is appreciated. I did change my rom to RAM-rom. how do i set the IMS-APN. whenever i add the IMS apn, it doesn't stick
Please help.
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After RAM Rom installation you can flash INU CSC, Dr Ketan uploaded it in some threads which i forgot.
for IMS apn , you simply create new APN with name and type as IMS and save it. It may not be listed or need not be selected in APNs list. but you could see the VoLTE in status bar after creating it. Also ensure that you create jionet APN first to get LTE access instead of using default jio APN settings.
devbiju said:
After RAM Rom installation you can flash INU CSC, Dr Ketan uploaded it in some threads which i forgot.
for IMS apn , you simply create new APN with name and type as IMS and save it. It may not be listed or need not be selected in APNs list. but you could see the VoLTE in status bar after creating it. Also ensure that you create jionet APN first to get LTE access instead of using default jio APN settings.
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thanks mate, figured that out..
gunz.jones said:
It may be a regional thing. My 910t uses volte on straight talk in the states with an att sim with no issues. Surprised me actually.
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I have a unlocked 910-T on Cricket and I can't use WiFi calling or VoLTE. And I got there new SIM card and still no go.

Problem trying to update via OTA

Well, as the title says, when I enter settings and then system updates, it starts to search for an update, but the after like 20 secs it stops and says "We have troubles authenticating your device, please try again later"
My note 9 is model SM-N960U and it's original carrier, is Verizon. I'm in Mexico tough, but it is unlocked, maybe that has to do with the problem? Any help appreciated.
I have a unlocked 960U1 with Verizon and am in the US. No update available. Maybe it is rolling out to Mexican customers only?
Sent from my SM-N960U1 using Tapatalk
Fast-T said:
I have a unlocked 960U1 with Verizon and am in the US. No update available. Maybe it is rolling out to Mexican customers only?
Sent from my SM-N960U1 using Tapatalk
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I'm on the September security patch, but I had to flash it with Odin. Bc when I search for an update that happens
Up
TonyGzl92 said:
Up
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most carriers require you to be on there network to get ota from them. you could flash the u1 firmware and get ota from samsung
https://forum.xda-developers.com/galaxy-note-9/how-to/stock-sm-n960u1-usa-unlocked-firmware-t3833566
jerrycoffman45 said:
most carriers require you to be on there network to get ota from them. you could flash the u1 firmware and get ota from samsung
https://forum.xda-developers.com/galaxy-note-9/how-to/stock-sm-n960u1-usa-unlocked-firmware-t3833566
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Yeah that's what I thought, but if I do, I'll lose things like VoLTE or any software features?
TonyGzl92 said:
Yeah that's what I thought, but if I do, I'll lose things like VoLTE or any software features?
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Yeah you will lose carrier features like volte and wifi calling
Sent from my SM-N960U using Tapatalk
jerrycoffman45 said:
Yeah you will lose carrier features like volte and wifi calling
Sent from my SM-N960U using Tapatalk
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You don't lose VoLTE on unlocked firmware unless you have ATT. Think OP said he was on Verizon. It works fine. Wi-Fi Calling would be lost (which is weird since they got that working on unlocked with S9 series, too).
Not sure what carrier he is on he said it was a Verizon phone that's unlocked but he was in Mexico so he might be able to get it I am on att and didn't know other carriers let you have volte thanks for the correction
Sent from my SM-N960U using Tapatalk
CrazyApe18 said:
You don't lose VoLTE on unlocked firmware unless you have ATT. Think OP said he was on Verizon. It works fine. Wi-Fi Calling would be lost (which is weird since they got that working on unlocked with S9 series, too).
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jerrycoffman45 said:
Not sure what carrier he is on he said it was a Verizon phone that's unlocked but he was in Mexico so he might be able to get it I am on att and didn't know other carriers let you have volte thanks for the correction
Sent from my SM-N960U using Tapatalk
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Oh maybe that's where I should've started. Sorry.
To be clear, the phone is from Verizon. The active CSC is VZW, as I mentioned, the phone is unlocked and I use it in Mexico with TELCEL carrier, i DON'T have VoLTE nor wifi calling (TELCEL only has VoLTE) the model is N960U. Do you think there is a way to get VoLTE and/or flash an 960U1 software even though mine is 960U?
Thanks for your responses
TonyGzl92 said:
Oh maybe that's where I should've started. Sorry.
To be clear, the phone is from Verizon. The active CSC is VZW, as I mentioned, the phone is unlocked and I use it in Mexico with TELCEL carrier, i DON'T have VoLTE nor wifi calling (TELCEL only has VoLTE) the model is N960U. Do you think there is a way to get VoLTE and/or flash an 960U1 software even though mine is 960U?
Thanks for your responses
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you can flash the u1 firmware just be sure to back up your data because the flash will erase your phone

Does the MetroPCS Moto e5 plus work on sprint? (After it's sim unlocked of course)

Hello, the question is as shown. I was unsure as GSM Arena showed it had support and I recall being able to flash a CDMA Rom to get this working.
elix9000 said:
Hello, the question is as shown. I was unsure as GSM Arena showed it had support and I recall being able to flash a CDMA Rom to get this working.
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sprint moto phones can work on metropcs but not sure, metropcs phones can work on sprint or not. please confirm if anyone is using metro on sprint.

Question Wifi calling s21 ultra US?

Does s21 ultra unlocked have wifi calling with att? I got the tmobile version if I flash unlocked software would I get wifi calling option with att?
Also if you flash carrier specific firmware do you get their updates as well or based on your sim?
mshouman123 said:
Does s21 ultra unlocked have wifi calling with att? I got the tmobile version if I flash unlocked software would I get wifi calling option with att?
Also if you flash carrier specific firmware do you get their updates as well or based on your sim?
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Someone just posted that they bought the unlocked US version and wifi calling is working for them with ATT without flashing any firmware. Hopefully it is the case.
mshouman123 said:
Does s21 ultra unlocked have wifi calling with att? I got the tmobile version if I flash unlocked software would I get wifi calling option with att?
Also if you flash carrier specific firmware do you get their updates as well or based on your sim?
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Unlocked on AT&T wifi calling works fine, HDVoice (AT&T version of VoLTE) works also.
Can't help you with the flashing questions.
Hello, I return to the topic, the security patch for the month of March for the SM-G998U1 has arrived and Wi-Fi calls have stopped working, someone else has stopped working, I am on Android 13

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