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How to get Hotspot and APN settings without root or mods

I bought a sprint N920P for use in Canada. It was sold unlocked but I discovered I couldn't turn on Hotspot or change the APN. After doing some research, I found that flashing the XAS firmware I can enable the hidden settings. I can still receive OTA and Knox is not tripped. The device is unrooted. Samsung Pay is functional. Link to firmware is here. It will wipe everything so backup first!
http://updato.com/firmware-archive-select-model?record=1CACD973C35D11E69215FA163EE8F90B
To get hotspot settings, download Samsung good lock. This will unlock the hidden hotspot settings. You can find good lock in the galaxy apps store and the hotspot toggle in the good lock pull down menu. Long press the hotspot toggle to access hohot settings.
To make sure the new firmware works, check if the firmware wiped your phone. If the phone boots up in the factory reset state, then you're good. If it doesn't try again.

I wouldn't say this is a for sure way. True test after you flash this firmware is to have Sprint Service. Whatever firnware you have, once you pop another SIM into the Sprint Note, 5 the APNS become editable. I popped in a T Mobile SIM and I was able to edit the T Mobile APN.
Sent from my SM-N920P using Tapatalk

Do devices connect tho? I have the same unlocked SM-N920P on a Canadian carrier, but when I try to connect a device to the hotspot, it doesn't work.

crackystride said:
Do devices connect tho? I have the same unlocked SM-N920P on a Canadian carrier, but when I try to connect a device to the hotspot, it doesn't work.
Click to expand...
Click to collapse
Yes devices do connect. On my phone I created a hotspot and I was able to link iPhone, and windows.

justinxfan said:
I bought a sprint N920P for use in Canada. It was sold unlocked but I discovered I couldn't turn on Hotspot or change the APN. After doing some research, I found that flashing the XAS firmware I can enable the hidden settings. I can still receive OTA and Knox is not tripped. The device is unrooted. Samsung Pay is functional. Link to firmware is here
Click to expand...
Click to collapse
I flashed the firmware that you included in the link, and I after installing I still cant find the hotspot option in the settings menu. Do you mind going a little further in depth in how you activated the hotspot?

jefferychan33 said:
I flashed the firmware that you included in the link, and I after installing I still cant find the hotspot option in the settings menu. Do you mind going a little further in depth in how you activated the hotspot?
Click to expand...
Click to collapse
As I suspected this does not work. He is able to edit the APN because he is on another carrier and not Sprint. Flashing firmware doesn't do anything.
He said he wiped the phone to factory state after he flsshed the firmware. Did you do that?

elcidroyale said:
As I suspected this does not work. He is able to edit the APN because he is on another carrier and not Sprint. Flashing firmware doesn't do anything.
He said he wiped the phone to factory state after he flsshed the firmware. Did you do that?
Click to expand...
Click to collapse
I'm not using sprint either, I have a sprint note 5 but running on Fido network in Canada. I'm hesitant to wipe my phone as the method may not even work. Maybe if OP responds, he can explain how he is able to enable hotspot.
I can access APN settings fine, but the hotspot function is non-existent in settings.

jefferychan33 said:
I'm not using sprint either, I have a sprint note 5 but running on Fido network in Canada. I'm hesitant to wipe my phone as the method may not even work. Maybe if OP responds, he can explain how he is able to enable hotspot.
I can access APN settings fine, but the hotspot function is non-existent in settings.
Click to expand...
Click to collapse
There is another thread he posted in - he just said that he did a factory reset. Did you do that? Anyone can access APN but not be able to edit the hotspot settings. I could do that on a stock Sprint Note 5. Sprint just greys out certain parts.

jefferychan33 said:
I flashed the firmware that you included in the link, and I after installing I still cant find the hotspot option in the settings menu. Do you mind going a little further in depth in how you activated the hotspot?
Click to expand...
Click to collapse
jefferychan33 said:
I'm not using sprint either, I have a sprint note 5 but running on Fido network in Canada. I'm hesitant to wipe my phone as the method may not even work. Maybe if OP responds, he can explain how he is able to enable hotspot.
I can access APN settings fine, but the hotspot function is non-existent in settings.
Click to expand...
Click to collapse
Sorry guys I updated the OP to fix my mistakes

elcidroyale said:
There is another thread he posted in - he just said that he did a factory reset. Did you do that? Anyone can access APN but not be able to edit the hotspot settings. I could do that on a stock Sprint Note 5. Sprint just greys out certain parts.
Click to expand...
Click to collapse
So after downloading Good Lock from the Samsung store hotspot menu seems to popup, but I'm having trouble actually having devices connect to my note 5. The wifi connection is seen, but the farthest I can go is "obtaining Ip address". Does anyone know how to solve this?

jefferychan33 said:
Well after a factory reset, nothing. Hotspot isn't available in the settings menu. :crying:
Click to expand...
Click to collapse
Looks like you have to download Good Lock. Let me know if this works. Didn't work for me on Sprint.

jefferychan33 said:
Well after a factory reset, nothing. Hotspot isn't available in the settings menu. :crying:
Click to expand...
Click to collapse
You have to install samsung good lock. It's available in the galaxy apps store. Read my OP for more info.

Try on different devices. Does computer work? Does its work? If they all don't work check your mobile data settings, apn settings and Hotspot settings.

So far this is not working for anyone one than the OP. I am considering this a non fix. If someone who has a Sprint phone is able to use Sprint service AND can edit APN that is a fix. Taking a Sprint phone and popping in a SIM from another carrier and being able to edit APN is not a fix but pretty common. Again I took a T Mobile SIM and popped into my Sprint phone and voila I am able to edit T Mobile's APN - because apparently T Mobile does not block access to edit APNs but Sprint DOES. I'm glad this worked for you Justinxfan - here's hoping for a true fix for the rest of us!

hey,
I want to buy a Sprint Note5 from ebay.
I'm going to use it on koodo in Canada
If I dont have access to apn settings does that mean I cannot use data on it?

bobola said:
hey,
I want to buy a Sprint Note5 from ebay.
I'm going to use it on koodo in Canada
If I dont have access to apn settings does that mean I cannot use data on it?
Click to expand...
Click to collapse
You can use data just fine, it's just that the hotspot functionality is blocked on the sprint note 5.

jefferychan33 said:
You can use data just fine, it's just that the hotspot functionality is blocked on the sprint note 5.
Click to expand...
Click to collapse
If you reboot the phone, upon boot, immediately go into enable hotspot, it will work until you reboot again. I've done this on several road trips with the kids and the unlimited plan comes in handy with three streaming youtube or netflix.

jefferychan33 said:
So after downloading Good Lock from the Samsung store hotspot menu seems to popup, but I'm having trouble actually having devices connect to my note 5. The wifi connection is seen, but the farthest I can go is "obtaining Ip address". Does anyone know how to solve this?
Click to expand...
Click to collapse
i have exact problem like this: i use unlocked sprint s6 in my country, i dig the hotspot setting with nova launcher, can turn it on and set the password up, use another phone/ipad/laptop and SEE the S6 wifi, connecting, and that's it.

Unlocked, developer HTC A9 Android 7.0 Issues

My daughter has an unlocked HTC A9 that just got an Android 7.0 update 2 days ago. Our carrier is T-Mobile USA and when the phone had Android 6.0.1, it had VoLTE and Wi-Fi Calling features working extremely well. Now after Android 7.0 upgrade these 2 particular features are gone from the software.
Can someone with an unlocked HTC A9 on T-Mobile USA check if their VoLTE and Wi-Fi Calling options are missing as well after Nougat upgrade? Thanks in advance.

xela19115 said:
My daughter has an unlocked HTC A9 that just got an Android 7.0 update 2 days ago. Our carrier is T-Mobile USA and when the phone had Android 6.0.1, it had VoLTE and Wi-Fi Calling features working extremely well. Now after Android 7.0 upgrade these 2 particular features are gone from the software.
Can someone with an unlocked HTC A9 on T-Mobile USA check if their VoLTE and Wi-Fi Calling options are missing as well after Nougat upgrade? Thanks in advance.
Click to expand...
Click to collapse
I did have the option in settings to switch VoLTE on or off, and it does seem to be missing here. If you want to know if it is on or off, go to phone and dial *#*#4636#*#* and click on phone information. Scroll down until you see either turn off volte provisioned flag or turn on volte provisioned flag. If it says turn off volte provisioned flag that means VoLTE is on. For the Wi-Fi calling, there is an option in settings for it I believe. Go to the call tab under setting and scroll all the way down to calling accounts. In that part of settings there is settings for "internet calling". Not sure if this is what you are looking for but this is what I found
Hope it helps, and good luck

xela19115 said:
My daughter has an unlocked HTC A9 that just got an Android 7.0 update 2 days ago. Our carrier is T-Mobile USA and when the phone had Android 6.0.1, it had VoLTE and Wi-Fi Calling features working extremely well. Now after Android 7.0 upgrade these 2 particular features are gone from the software.
Can someone with an unlocked HTC A9 on T-Mobile USA check if their VoLTE and Wi-Fi Calling options are missing as well after Nougat upgrade? Thanks in advance.
Click to expand...
Click to collapse
I have an HTC A9 (oem unlocked), on T-Mobile USA.
VoLTE and Wi-Fi was not enabled by default until I manually forgot and reconnected to my Wi-Fi network. Afterwards, I went to settings, Call, and scrolled all the way down. There's a new section called "Enhanced Call Service" and VoLTE and WiFi Calling are now options available.

MegaMan X said:
I have an HTC A9 (oem unlocked), on T-Mobile USA.
VoLTE and Wi-Fi was not enabled by default until I manually forgot and reconnected to my Wi-Fi network. Afterwards, I went to settings, Call, and scrolled all the way down. There's a new section called "Enhanced Call Service" and VoLTE and WiFi Calling are now options available.
Click to expand...
Click to collapse
OK. Thanks. The tip about "forgetting" the network and re-adding might be worth trying. But only later today, once I get home.

xela19115 said:
OK. Thanks. The tip about "forgetting" the network and re-adding might be worth trying. But only later today, once I get home.
Click to expand...
Click to collapse
So I deleted/"forgot" all of the Wi-Fi networks. Rebooted the phone. And still no Enhanced Services with VoLTE and Wi-Fi calling area under Settings --> Call. next step would be to do a factory reset and see if that helps.

xela19115 said:
So I deleted/"forgot" all of the Wi-Fi networks. Rebooted the phone. And still no Enhanced Services with VoLTE and Wi-Fi calling area under Settings --> Call. next step would be to do a factory reset and see if that helps.
Click to expand...
Click to collapse
Have you tried a network settings reset? It should be under settings>backup and reset

I'm having the same issue. I'm wondering where the Wi-fi Calling feature is. I have the US Unlocked/Dev edition and the "Wi-fi Calling" tab isn't under "Mobile Data" like it was on 6.0.1 .

I have the unlocked a9 on tmobile and everything worked well immediately after updating.
I have yet to make an actual call over wifi on nougat but sms worked fine and volte certainly works.
The only strange thing is the lte indicator seems to be the verizon one
Perhaps you should try taking the sim out, restarting, putting the sim back in and see if that makes the phone recognise it needs to use tmo settings?
---------- Post added at 10:30 PM ---------- Previous post was at 10:28 PM ----------
theNdroid said:
I'm having the same issue. I'm wondering where the Wi-fi Calling feature is. I have the US Unlocked/Dev edition and the "Wi-fi Calling" tab isn't under "Mobile Data" like it was on 6.0.1 .
Click to expand...
Click to collapse
volte and wifi calling are under "calls" now. scroll all the way down

treeco72 said:
I have the unlocked a9 on tmobile and everything worked well immediately after updating.
I have yet to make an actual call over wifi on nougat but sms worked fine and volte certainly works.
The only strange thing is the lte indicator seems to be the verizon one
Perhaps you should try taking the sim out, restarting, putting the sim back in and see if that makes the phone recognise it needs to use tmo settings?
---------- Post added at 10:30 PM ---------- Previous post was at 10:28 PM ----------
volte and wifi calling are under "calls" now. scroll all the way down
Click to expand...
Click to collapse
Where do you see "Wi-Fi Calling" ? ?

theNdroid said:
Where do you see "Wi-Fi Calling" ? ?
Click to expand...
Click to collapse
i would suggest restarting your phone with no sim inside and then put one it to see whether the device recognises are new carrier

treeco72 said:
i would suggest restarting your phone with no sim inside and then put one it to see whether the device recognises are new carrier
Click to expand...
Click to collapse
Are you sure you have the US Unlocked/Developers edition?

It appeared after I flashed the Nougat RUU

theNdroid said:
It appeared after I flashed the Nougat RUU
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Click to collapse
I am on 2.18.617.21 and can't find these settings. How to get them back. Unable to make or receive calls on my mobile since mine is an LTE only network. Tried factory reset and changing CID to 11111111, but nothing worked.

wifi calling on tmobile us verizone att

is there anyone with HTC u12+ on tmobile Us Verizone and Att with working wifi calling and volte who could share their default.xml file from system/customize/Acc and map_mns.xml system/customize and also all xml files from system/customize/mns trying to make wifi calling and volte on any htc u12+ or htc u11+
link to my thread
https://forum.xda-developers.com/u12-plus/how-to/wi-fi-calling-volte-t3867267
thanks for any help

The HTC u12+ for Verizon only has LTE capabilities. So all calls are by default VoLTE. However, WiFi Calling is a no go. It would be awesome if we could get that to work.
The files you need, do they contain any sensitive information about the phone? If not, I could grab you all the ones from my Verizon HTC u12+

JWhetstone02 said:
The HTC u12+ for Verizon only has LTE capabilities. So all calls are by default VoLTE. However, WiFi Calling is a no go. It would be awesome if we could get that to work.
The files you need, do they contain any sensitive information about the phone? If not, I could grab you all the ones from my Verizon HTC u12+
Click to expand...
Click to collapse
No there no imei or any other sensitive information in them only carrier settings etc

marcinkoko009 said:
No there no imei or any other sensitive information in them only carrier settings etc
Click to expand...
Click to collapse
here you go
Verizon HTC u12+

JWhetstone02 said:
here you go
Verizon HTC u12+
Click to expand...
Click to collapse
Thanks mate will check that later today and see the different against mine

JWhetstone02 said:
here you go
Verizon HTC u12+
Click to expand...
Click to collapse
hi mate i did check yours files and edited them according default.xml from verizon branded htc 10
can you do backup of your default.xml from system/customize/acc
then delete and copy attached one in
to copy that you need place on sdcard then boot twrp and use file manager built in adavanced settings and paste in system/customize/acc
then reboot your phone and let me know if you got wifi calling and volte working
you should be able see options under call settings and volte icon and wifi calling icon in statusbar
let me know if works
regards

I have WiFi calling options, but it killed data and service

JWhetstone02 said:
I have WiFi calling options, but it killed data and service
Click to expand...
Click to collapse
OK is Wi-Fi calling working at all ?
Will check that files again looks like I missed something
Just put your default.xml back

marcinkoko009 said:
OK is Wi-Fi calling working at all ?
Will check that files again looks like I missed something
Just put your default.xml back
Click to expand...
Click to collapse
WiFi calling did not work. All options were there, it let me uncheck and check, but when I went to make a call it wanted me to turn off airplane mode and wait for a mobile network to be available. and form the screenshot above, there is no mobile data.
Is there a way you can just edit the wifi calling stuff and not mess with the VoLTE. VoLTE is by default already on the phone through verizon

this is also what it shows as default from Verizon
just need to be able to enable the video and wifi calling

JWhetstone02 said:
WiFi calling did not work. All options were there, it let me uncheck and check, but when I went to make a call it wanted me to turn off airplane mode and wait for a mobile network to be available. and form the screenshot above, there is no mobile data.
Is there a way you can just edit the wifi calling stuff and not mess with the VoLTE. VoLTE is by default already on the phone through verizon
Click to expand...
Click to collapse
Yes I will try to check that again
Thanks for testing

JWhetstone02 said:
The HTC u12+ for Verizon only has LTE capabilities. So all calls are by default VoLTE. However, WiFi Calling is a no go. It would be awesome if we could get that to work.
The files you need, do they contain any sensitive information about the phone? If not, I could grab you all the ones from my Verizon HTC u12+
Click to expand...
Click to collapse
can u check that just do backup of your files and copy that in to system/customize

marcinkoko009 said:
can u check that just do backup of your files and copy that in to system/customize
Click to expand...
Click to collapse
Tried those files and this is what I have.
The video calling and WiFi calling are turned on under phone information
When going to phone > call > settings I cannot enable the WiFi calling in there. If I click it like 5 times, then it is enabled but it will turn off the time I back out the menu. Also it will not let me choose the preferred calling over WiFi vs Mobile network when it is enabled

JWhetstone02 said:
Tried those files and this is what I have.
The video calling and WiFi calling are turned on under phone information
When going to phone > call > settings I cannot enable the WiFi calling in there. If I click it like 5 times, then it is enabled but it will turn off the time I back out the menu. Also it will not let me choose the preferred calling over WiFi vs Mobile network when it is enabled
Click to expand...
Click to collapse
ok thanks i think we getting closer
4g still works and network signal as i can see so that is good
what is you phone cid?

JWhetstone02 said:
Tried those files and this is what I have.
The video calling and WiFi calling are turned on under phone information
When going to phone > call > settings I cannot enable the WiFi calling in there. If I click it like 5 times, then it is enabled but it will turn off the time I back out the menu. Also it will not let me choose the preferred calling over WiFi vs Mobile network when it is enabled
Click to expand...
Click to collapse
ok can u try attached last time for today
if not i will try dig around other forums to see if or what is missing
thanks for you help with testing

marcinkoko009 said:
ok can u try attached last time for today
if not i will try dig around other forums to see if or what is missing
thanks for you help with testing
Click to expand...
Click to collapse
I tried those files and it did indeed let me turn the WiFi Calling on and select which preferred way to go. But I could no longer make any calls. With it without WiFi enabled.

JWhetstone02 said:
I tried those files and it did indeed let me turn the WiFi Calling on and select which preferred way to go. But I could no longer make any calls. With it without WiFi enabled.
Click to expand...
Click to collapse
OK thanks I will dig some other forums to see if we can make that working

It's been a little while since your last update. Have you got wifi calling to work, and video calling???
thanks

k hammer said:
It's been a little while since your last update. Have you got wifi calling to work, and video calling???
thanks
Click to expand...
Click to collapse
Hi sorry but no luck

Asus Zenfone 6Z wifi calling activation

Here are the steps to activate Jio wifi calling on Asus 6Z. You need to enter code *#*#3642623344#*#* and this will activate special menu under Network settings. You need to deactivate Volte/Enhanced calling switch first then activate wifi calling and after getting wifi calling symbol again reactivate Volte switch. You need to repeat this after every restart of phone.
Link to video-
https://youtu.be/GfUqsbIr058

Why is there no prompt when I type and nothing appears on the phone interface?

You should go in network settings amd check change

kanghuihui said:
Why is there no prompt when I type and nothing appears on the phone interface?
Click to expand...
Click to collapse
That's how these cheat code works. It does the job in background. After entering, it should just go back to dialer without having press to call button. Then, check in settings.

There is wifi call in the settings, but there is no icon in the status bar after I turn it on. I follow the video

kanghuihui said:
There is wifi call in the settings, but there is no icon in the status bar after I turn it on. I follow the video
Click to expand...
Click to collapse
what is your pocation and handset model?

Model is zenfone6，Bought in Hong Kong

kanghuihui said:
Model is zenfone6，Bought in Hong Kong
Click to expand...
Click to collapse
Does your operator support wifi calling? In India this method works perfectly

There are Wifi calling functions in the settings, and the operations described in the videos and posts are also followed. There is no wifi call icon, and there is no attempt to call. Is it not supported in the Hong Kong version? Although this function is available, it is invalid.

Wifi calling already enabled on this Android Q, no need to d this..I am already using it
dial *#*#4636#*#* you will easily get WiFi enabled service

Does it really work though? After doing this, it refuses to make a call if you say wifi calling only which makes me think it still needs the mobile carrier to have a signal for calls.
Service is t-mobile fyi.

It is working flawlessly in India on Jio network. I have demonstrated in Video also

enkryptik said:
Does it really work though? After doing this, it refuses to make a call if you say wifi calling only which makes me think it still needs the mobile carrier to have a signal for calls.
Service is t-mobile fyi.
Click to expand...
Click to collapse
It only works in India (maybe some other places?). They don't seem to care about the US.
According to one of the mods on the Zenfone forum:
"When it comes to features like VoWiFi, VoLTE and so on. It's about testing, paying fees and signing contracts."
I don't think they care enough about the US (they don't really push the phone here) to pay the money. Don't hold your breath. Probably need to go custom ROM.

Custom ROMs didn't allow it to work on TMobile either. Glad some can actually use it though.

Volte doesn't work in the USA

VZW WIFI Calling on unlocked Note 20 ultra 5G

Found out the guy lied. So the US unlocked N20U does work with VZW wifi calling.

It definitely does work with my N20U on Verizon.

The only differences between the Unlocked and VZW version are:
1. Native Verizon video calling doesn't work on unlocked, but the integrated Duo video calling is better anyways.
2. Verizon's model doesn't have the Samsung "Smart Call" feature for Caller ID. Instead, it uses Verizon's app.
3. Verizon's version has the Verizon bootscreen and a ton of bloatware, especially games, news apps, and what not. Fortunately, most can be uninstalled, and the rest can be disabled using ADB.

Guyinlaca said:
The only differences between the Unlocked and VZW version are:
1. Native Verizon video calling doesn't work on unlocked, but the integrated Duo video calling is better anyways.
2. Verizon's model doesn't have the Samsung "Smart Call" feature for Caller ID. Instead, it uses Verizon's app.
3. Verizon's version has the Verizon bootscreen and a ton of bloatware, especially games, news apps, and what not. Fortunately, most can be uninstalled, and the rest can be disabled using ADB.
Click to expand...
Click to collapse
I can confirm all of the above. I have an unlocked phone, on U1 firmware, with a Verizon SIM. Wifi calling works. There is no "Advanced Calling" menu in Connection Settings, but there's a toggle for VoLTE and it was switched on by default. No 4G icon, but rather a LTE+ icon is shown in status bar. The only thing I haven't found a workaround for is the native video calling. I cannot initiate it (phone app does not show the option when I'm on a call with another Verizon phone) and if another Verizon phone attempts to initiate a native video call, it tells them that I cannot accept video calls. I checked my VZW account settings on a PC, and despite the video call option being on and not blocked, native calling doesn't work, as described above. Duo works fine for video. I was able to get Visual Voicemail by installing the app that I go from another thread. I installed it before checking to see if the U1 firmware added it by default, so I can't say for sure that it wasn't there already.
Sent from my SM-N986U using Tapatalk

So I had an interesting observation. I flashed my Verizon Note 10+ to U1 firmware and noticed a drastic reduction in data speeds. After getting the Note 20 Ultra, I noticed the data speeds were nearly doubled. I then disabled a ton of Verizon and Samsung apps, and my data speeds dropped drastically as well. Through the process of elimination, I found that the "My Verizon Services" app seems to have a major impact on data speeds. As long as I keep that enabled on the Verizon firmware, data speeds are blazing fast.
Is it possible that Verizon uses apps to prioritize or de-prioritize data speeds? I'd be curious if one could do a side by side of the Unlocked vs Verizon firmware.

ferzmedina said:
I can confirm all of the above. I have an unlocked phone, on U1 firmware, with a Verizon SIM. Wifi calling works. There is no "Advanced Calling" menu in Connection Settings, but there's a toggle for VoLTE and it was switched on by default. No 4G icon, but rather a LTE+ icon is shown in status bar. The only thing I haven't found a workaround for is the native video calling. I cannot initiate it (phone app does not show the option when I'm on a call with another Verizon phone) and if another Verizon phone attempts to initiate a native video call, it tells them that I cannot accept video calls. I checked my VZW account settings on a PC, and despite the video call option being on and not blocked, native calling doesn't work, as described above. Duo works fine for video. I was able to get Visual Voicemail by installing the app that I go from another thread. I installed it before checking to see if the U1 firmware added it by default, so I can't say for sure that it wasn't there already.
Sent from my SM-N986U using Tapatalk
Click to expand...
Click to collapse
Thanks for sharing your observations regarding wifi calling. How can one tell it is working? I am used to older phones advising that wifi calling was in use via text in the phone app. I'm not seeing this notification on my new unlocked T-Mobile-branded N20U with Verizon SIM.
I also noticed the VoLTE toggle in the phone app, switched on and greyed-out, can't be deselected. Of course they don't want to support anything but VoIP anymore. What is the behavior, if the cell signal is decent it won't use wifi? It can't be forced to prefer wifi, can it? I used the trick of putting it in airplane mode, then turn on wifi to try and force it to wifi call. It said it couldn't make the call in airplane mode, which is not encouraging regarding wifi calling being functional on this phone/provider combo.

[email protected] said:
Thanks for sharing your observations regarding wifi calling. How can one tell it is working? I am used to older phones advising that wifi calling was in use via text in the phone app. I'm not seeing this notification on my new unlocked T-Mobile-branded N20U with Verizon SIM.
I also noticed the VoLTE toggle in the phone app, switched on and greyed-out, can't be deselected. Of course they don't want to support anything but VoIP anymore. What is the behavior, if the cell signal is decent it won't use wifi? It can't be forced to prefer wifi, can it? I used the trick of putting it in airplane mode, then turn on wifi to try and force it to wifi call. It said it couldn't make the call in airplane mode, which is not encouraging regarding wifi calling being functional on this phone/provider combo.
Click to expand...
Click to collapse
From what I've found, if you put another carrier's SIM in a truly unlocked carrier branded phone, it should prompt you to apply your carrier settings upon boot. For example when I put a Spectrum SIM in a Verizon phone, it "converted" the CSC (Carrier settings and boot logo) to Spectrum.
My recommendation is to attempt to get the SIM to switch the CSC automatically. If not, use the patched ODIN to flash the Unlocked U1 firmware, and optionally you can flash Verizon from there if Verizon's Video Calling is a must.

Guyinlaca said:
From what I've found, if you put another carrier's SIM in a truly unlocked carrier branded phone, it should prompt you to apply your carrier settings upon boot. For example when I put a Spectrum SIM in a Verizon phone, it "converted" the CSC (Carrier settings and boot logo) to Spectrum.
My recommendation is to attempt to get the SIM to switch the CSC automatically. If not, use the patched ODIN to flash the Unlocked U1 firmware, and optionally you can flash Verizon from there if Verizon's Video Calling is a must.
Click to expand...
Click to collapse
Thanks for the detailed response. I was a little concerned about the T-Mobile branding, and what that truly meant at the software level. I installed the Verizon SIM to this factory-reset phone. If it was going to switch CSC I think it would have happened then. It went through the usual setup steps, but still displays T-Mobile screen at boot. I'm not sure what else I would do to "get the SIM to switch the CSC automatically".
Would you agree with my conclusion that wifi calling isn't working based on the outgoing call failure when in airplane mode with wifi on?
If there is better, more-unlocked firmware I'm not opposed to flashing it. It's been a while since I've played with rooting and custom ROMS, but I'm guessing stock firmware is a lower-risk activity on an expensive phone.
I'll refer to this link to try and flash to unlocked U1 firmware, hopefully that will allow wifi calling compatibility:
OTA and Non-OTA Firmware for N986U and N986U1