I was able to activate Volte, any interest in knowing how?

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Benovite

Member
Feb 23, 2013
32
4
Los Angeles
m.youtube.com
First and most crucial thing is accessing the hidden menu aka service mode aka dialer code heaven.

It's done by using the hidden menu tool that's linked in this page:
https://www.reddit.com/r/verizon/comments/c9tovo
It's extremely easy and stupid fast.

Once you've done that you must enable advanced calling in settings. The beauty of it is that it can be done without having to deal with Verizon at all. It's done by accessing IMS settings.

Still with me? If you give a **** beep twice.

Just a reminder/standard Android warning; use the hidden menus with caution. You know this part if you've ever messed with flashing ROMs and all that. There's potential for you to mess up your phone so, you know..
 

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Benovite

Member
Feb 23, 2013
32
4
Los Angeles
m.youtube.com
FACTORY MODE
Enter in calculator
(+ 30012012732+

Diagnostic mode(enter either in calculator or dial pad)
##366633#

VERIZON IOTHIDDENMENU
##433346#

Band select/service mode
*#27663368378#

IMS setting menu
*#467#

IMS Settings
- Hit the more options/three dots on upper right of screen
- Select 'Reset to default'
This should activate 'Advanced Calling' in the settings menu without dealing with Verizon. Keep in mind you might have to restart your phone after you reset the IMS settings to default.
- Go back to IMS settings (*#467#) after Advanced Calling is available(you should see that HD voice and video are enabled)
-Under IMS Setting, tap the first option “IMS Service switch”.
-On the next screen, make sure all the toggles are on. If any toggle is off, turn it on.
-Go back and tap “Self Provisioning”. First two options i.e. Provisioning and EAB should show “Enable”. If they show something else, tap “Toggle Provisioning” to enable them.
-Again go back and tap “IMS information”. Verify that all the settings are enabled on the IMS information screen.
-Restart your device.

>Manually add the IMS APN

1) Create an IMS APN
Settings → Mobile Networks →Access Point Names → Add

Select Settings and Mobile Network

Select Access Point Names, Select Add

2) Input IMS setting
Name: ims
APN: ims
APN type: ims
 
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Jan 12, 2023
43
6
I have never posted here before but I nearly had to buy a new phone because the information I am about to share was not available anywhere on the entire internet even though I had to use the starting point of the above Gentleman's information. Ok so if your Verizon Galaxy Note 4 (although it may work on other carriers as well) was not previously activated in the actual android OP (within the "advanced calling" Setting) and it happens to be on an MVNO Sim card, then the above strategy will not be enough to activate advanced calling (or WIFI calling) because unfortunately these Note 4's are so old that the OS thinks that it has to connect with a 3G tower to make a handshake with your Verizon account before it can tell your OS to proceed with activating the advanced calling. So since you cannot walk into a verizon store and have an tech guru reprogram it for you without the 3G Tower handshake, what you have to do to get it to work is you have (same with Visual Voicemail by the way) to actually enter into the IOT Hidden menu (via above method and then ##433346#) and then click Data then edit and now you are in the data programming menu and then you just need to hit HDR/1X Selection and then click LTE Only Mode and save. Finally in the IMS Setting (above) you must go into the DM configuration and click the VOLTE_Enabled setting and change the 0 to a 1. Good luck and I will take questions if you need help, and thanks for finding the info above OP!
 
Last edited:

Eman_Resu

New member
Jun 29, 2010
4
0
I have never posted here before but I nearly had to buy a new phone because the information I am about to share was not available anywhere on the entire internet even though I had to use the starting point of the above Gentleman's information. Ok so if your Verizon Galaxy Note 4 (although it may work on other carriers as well) was not previously activated in the actual android OP (within the "advanced calling" Setting) and it happens to be on an MVNO Sim card, then the above strategy will not be enough to activate advanced calling (or WIFI calling) because unfortunately these Note 4's are so old that the OS thinks that it has to connect with a 3G tower to make a handshake with your Verizon account before it can tell your OS to proceed with activating the advanced calling. So since you cannot walk into a verizon store and have an tech guru reprogram it for you without the 3G Tower handshake, what you have to do to get it to work is you have (same with Visual Voicemail by the way) to actually enter into the IOT Hidden menu (via above method and then ##433346#) and then click Data then edit and now you are in the data programming menu and then you just need to hit HDR/1X Selection and then click LTE Only Mode and save. Finally in the IMS Setting (above) you must go into the DM configuration and click the VOLTE_Enabled setting and change the 0 to a 1. Good luck and I will take questions if you need help, and thanks for finding the info above OP!

DUUUUUUUUUUUUUUUUUUUUDE!!!!!!!!!!!!!!!!!!! This is it!!! You are a steely-eyed missile man! I have been trying to reconnect my Note 4 to Verizon since they shut off 3G. I thought maybe my issue was related to not having HD setup prior to losing the 3G connection. As you have pointed out, that is the case. No matter what I did, I could not enable HD through the advanced calling menu. Toggling the bit was the key to the whole thing! I cannot thank you enough. I really like my Note 4. Yes, it's old, but it has a lot of great features that they just don't include on new phones. I understand that someday she will be forced to retire, but not today Verizon.... not today.
 
Last edited:

ForestCat

Senior Member
Nov 29, 2012
102
26
Yes, it's old, but it has a lot of great features that they just don't include on new phones.
True that. In the same boat. The ONLY things missing from the Note 4 are camera2 api and faster/more consistent GPS lock. Other than that, perfect phone for me. I got VoLTE working on VZW, but their 4G coverage blows in my area, missed/dropped 75% of calls. I have nearly everything working w/ a T-Mobile SIM, except voice calls fall back to 2G/CDMA. I'd LOVE to figure out how to get VoLTE on T-Mobile's towers, but it's still usable, since T-Mobile has great 4G LTE Band 4 coverage here, and decent 2G/GSM. So far, they have not announced end of life for 2G/GSM. I have been a VZW customer since they were Bell Atlantic, like 25 years. Had the grandfathered true unlimited data plan. Their service degradation over the last few years is inexcusable. Driving around last week w/ two identical note 4's, one w/ a T-Mobile SIM, one w/ VZW was an eye opener. Should have done this 10 years ago.
 
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ForestCat

Senior Member
Nov 29, 2012
102
26
Just a reminder/standard Android warning; use the hidden menus with caution. You know this part if you've ever messed with flashing ROMs and all that. There's potential for you to mess up your phone so, you know..
Benovite, thanks for this procedure. Do you know, by any chance,
a) Where these settings are actually stored?
b) Is there a way to back up/restore the settings before messing with them?

Google search has been zero help on this. I don't know if a nandroid(twrp) backup of System/Data would save/restore all the hidden dialer menu settings. Would love to know for sure. Thanks,
 
Jan 12, 2023
43
6
DUUUUUUUUUUUUUUUUUUUUDE!!!!!!!!!!!!!!!!!!! This is it!!! You are a steely-eyed missile man! I have been trying to reconnect my Note 4 to Verizon since they shut off 3G. I thought maybe my issue was related to not having HD setup prior to losing the 3G connection. As you have pointed out, that is the case. No matter what I did, I could not enable HD through the advanced calling menu. Toggling the bit was the key to the whole thing! I cannot thank you enough. I really like my Note 4. Yes, it's old, but it has a lot of great features that they just don't include on new phones. I understand that someday she will be forced to retire, but not today Verizon.... not today.
Your very welcome! I was not willing to give up on any of my note 4's either as they have so many features that absolutely no modern phone has such as:

IR blaster, removable battery, option of Qi charging Cover or regular cover, Heart rate, Blood pressure, O2 Level, Can connect to all 4 main GPS systems {GPS/US, GLONASS/Russia, Galileo/EU, BeiDou/China}, it works on almost all GSM & CDMA Networks including the unusual cdma networks in South America which I use every year or two when we visit my wifes family in Colombia and much more. They dont make phones that are swiss army like how this old note is, in fact I have tried other notes (including the last note that samsung made) and I absolutely hated it and took it back!

So because I just dont ever want to give up my note (it does absolutely everything I need in a phone and more) I decided to just keep messing with each value of each setting until I finally found the one that works! It was a little easier for me though because I had my wifes daily note 4 and mine daily note 4 and 2 spares to look at different settings so that when I messed up a setting I could return it to what my wifes note 4 had. The only reason I figured out the value changing thing is because one of my old android 5.1.1. note fours had the advanced calling activated when I retired it and as soon as I stuck my current sim card in it I was able to immediately make VoLte calls, so I knew there had to be a setting somewhere that would toggle it on. If anyone wants to activate Video calling on their note 4's (for free) it is actually done the same way. Simply go in to the IMS settings *#467# (which you can only do once you have unlocked the global hidden menu....see above) and make sure it is toggled on in the service switch setting first under the heading VoLte-Video Then head back into the DM Configuration and change toggle the show all values tab at the top to on and then scroll down until you see "LVC_Enabled" And change the 0 to a 1 and then to unhide the video tab in your dialer you need to keep scrolling down and find the one that says "Options _Enabled" and again change the 0 to a 1 and then scroll down and change the "VCE_Config" from 0 to 1 (it may already be a 1 though, its weird, but make sure it is a 1). Now finally Switch your phone to airplane mode and then back off and go back to the main IMS Screen and scroll down and select ims information and make sure that Video over IP is enabled. If it is not you may need to restart your phone. So what is crazy is that the video calling on this phone never worked on any MVNO's and never even worked when using verizon pre-paid, it only ever worked on this phone when I had verizon Post Paid, so I find it incredible that it can be activated like this. What it makes me wonder is if the Text message Chat feature can get activated the same way (although I havent figure that one out yet)! Anyhow my fellow note 4 lovers, I hope you do enjoy this tid bit of info!
 
Jan 12, 2023
43
6
Benovite, thanks for this procedure. Do you know, by any chance,
a) Where these settings are actually stored?
b) Is there a way to back up/restore the settings before messing with them?

Google search has been zero help on this. I don't know if a nandroid(twrp) backup of System/Data would save/restore all the hidden dialer menu settings. Would love to know for sure. Thanks,
So, I know for sure that it has to be saved someone within the backup file that you can create through android because I backed up the note 4 phone that had advanced calling activated and then did a factory reset and then used odin to install the latest Stock fw file (the one from 2020 that had the better Modem FW) and as soon as I started it up with the sim card the advanced calling was de-activated and could not be re-activated through the normal channel, but then once I restored the android (or google) backup it was automatically re-enabled after the restore was complete. I suspect it is saved someone in the actually IMS settings app (it is actually a samsung app) which I discovered using activity launcher and apk analyzer. I wonder if you could use activity laucher to figure out if your tmobile version note 4 has this system app in it? If it does have this app, I actually figured out that you can unlock this hidden menu without the verizon program on your PC (you dont even need a PC). All you actually have to do is:
Dial ##366633# on the phone then - Select the enable DM Mode on the phone, and then
After This enter main the main IOTHIDDEN MENU using ##433346# then click
- Data (takes you to Data Programming Screen)
- Edit (Data Programming)
- More (takes you to "Others" Screen)
- Click on Global Hidden Menu Selection & Change to Enabled, and boom done your now have an unlocked IMS Service menu and if you can make it here with your t-mobile phone, then you should be able to copy all the values from someone else's tmobile VoLte working Android phone regardless of what T-Mobile tells you!

Just in case anyone is wondering, I actually tried copying the Carrier Services APK and the IMS Settings APK from my android 6.0.1 phone (my daily driver) to one of my other note 4s that I recently rooted (thank you JKRuse for your ridiculously easy rooting instructions for MM) and installed Lineage 18.1 on (thank you very much Ripee For all your hard work there) to see if I could somehow get these system apps to get VoLte working on lineage (I know it was a ridiculous long shot) and NO JOY :(

This was a sad thing indeed because that is the only thing about my old notes here is that I cannot use the Samsung Smart things app to see what is in my family hub refrigerator (when I am out at the Grocery store) and I cannot use the sams club Scan and Go app because both of those apps require android 8.0 and above! And if it wasn't for not being able to get SMS over IP and Voice over IP working on lineage, it would be a perfect operating system for the note 4's! The only downside I could find was that I could not get a stable 4k video (which I never use anyway because it takes way too much sd card space) and the Bluetooth is not stable. But other than that it runs sooo sooo good on the note 4! It is 10 times faster than the Stock fw and then we could use modern apps! Man I wish we could all somehow work together to get VoLte on lineage and fix the Bluetooth and then Bang we have our notes for another 6 or 7 years at least (especially now that I discovered Aliexpress has sellers that are still making Note 4 battery's fresh which means they have not degraded in capacity like all the ones on amazon and ebay). Anyhow good luck!
 
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ForestCat

Senior Member
Nov 29, 2012
102
26
So, I know for sure that it has to be saved someone within the backup file
Thanks, good info. RE: Lineage, etc, there are a lot of cool ROMS out there, but in my experience, once you move away from touchwiz, there's always gonna be some functionality that you have to give up. I've been on MODestROM v11 since I got the phone, and it's been awesome. EVERYTHING works. But, like you say, it's 6.01, and we're slowly being left behind. I'm always looking for a new phone, but every time I think I'm close there's something that horrifies me about it. No charging LED???? Really???? These companies, Apple, Google, MS, Samsung, et al, have been adopting the worst of each other's anti-consumerism 'features' for decades. Apple started it. Now we have forced updates you can't roll back, bootloaders you can't unlock (thanks, Samsung) ,windows computers with no network activity indicators, no hdd activity indicators, etc. Which is fine, I guess, if you're cool with the dumbing-down of everything. I'm not. Heaven forbid we could actually replace the ONE THING in our phone that WILL fail (the battery), and get to continue working the way we want with the hw we've learned. Oh well.
/rantOff
 
Jan 12, 2023
43
6
Thanks, good info. RE: Lineage, etc, there are a lot of cool ROMS out there, but in my experience, once you move away from touchwiz, there's always gonna be some functionality that you have to give up. I've been on MODestROM v11 since I got the phone, and it's been awesome. EVERYTHING works. But, like you say, it's 6.01, and we're slowly being left behind. I'm always looking for a new phone, but every time I think I'm close there's something that horrifies me about it. No charging LED???? Really???? These companies, Apple, Google, MS, Samsung, et al, have been adopting the worst of each other's anti-consumerism 'features' for decades. Apple started it. Now we have forced updates you can't roll back, bootloaders you can't unlock (thanks, Samsung) ,windows computers with no network activity indicators, no hdd activity indicators, etc. Which is fine, I guess, if you're cool with the dumbing-down of everything. I'm not. Heaven forbid we could actually replace the ONE THING in our phone that WILL fail (the battery), and get to continue working the way we want with the hw we've learned. Oh well.
/rantOff
Hahaha I laugh because absolutely everything you said there are the things I tell my wife when she asked why we don't 'upgrade' our Asus work Laptops! And then of coarse you are absolutely correct about the phones! It sad because even though everything is continually being dumbed down, it is not in a good / more useful way it is always in a way that causes us the consumers to have to go more often to the mega corps tit to drink! Seriously though Loved the rant, and I appreciate the tip on the Modest Rom, I have not used it but now I will try it out.
 

dave678

Senior Member
Aug 17, 2019
465
47
So, I know for sure that it has to be saved someone within the backup file that you can create through android because I backed up the note 4 phone that had advanced calling activated and then did a factory reset and then used odin to install the latest Stock fw file (the one from 2020 that had the better Modem FW) and as soon as I started it up with the sim card the advanced calling was de-activated and could not be re-activated through the normal channel, but then once I restored the android (or google) backup it was automatically re-enabled after the restore was complete. I suspect it is saved someone in the actually IMS settings app (it is actually a samsung app) which I discovered using activity launcher and apk analyzer. I wonder if you could use activity laucher to figure out if your tmobile version note 4 has this system app in it? If it does have this app, I actually figured out that you can unlock this hidden menu without the verizon program on your PC (you dont even need a PC). All you actually have to do is:
Dial ##366633# on the phone then - Select the enable DM Mode on the phone, and then
After This enter main the main IOTHIDDEN MENU using ##433346# then click
- Data (takes you to Data Programming Screen)
- Edit (Data Programming)
- More (takes you to "Others" Screen)
- Click on Global Hidden Menu Selection & Change to Enabled, and boom done your now have an unlocked IMS Service menu and if you can make it here with your t-mobile phone, then you should be able to copy all the values from someone else's tmobile VoLte working Android phone regardless of what T-Mobile tells you!

Just in case anyone is wondering, I actually tried copying the Carrier Services APK and the IMS Settings APK from my android 6.0.1 phone (my daily driver) to one of my other note 4s that I recently rooted (thank you JKRuse for your ridiculously easy rooting instructions for MM) and installed Lineage 18.1 on (thank you very much Ripee For all your hard work there) to see if I could somehow get these system apps to get VoLte working on lineage (I know it was a ridiculous long shot) and NO JOY :(

This was a sad thing indeed because that is the only thing about my old notes here is that I cannot use the Samsung Smart things app to see what is in my family hub refrigerator (when I am out at the Grocery store) and I cannot use the sams club Scan and Go app because both of those apps require android 8.0 and above! And if it wasn't for not being able to get SMS over IP and Voice over IP working on lineage, it would be a perfect operating system for the note 4's! The only downside I could find was that I could not get a stable 4k video (which I never use anyway because it takes way too much sd card space) and the Bluetooth is not stable. But other than that it runs sooo sooo good on the note 4! It is 10 times faster than the Stock fw and then we could use modern apps! Man I wish we could all somehow work together to get VoLte on lineage and fix the Bluetooth and then Bang we have our notes for another 6 or 7 years at least (especially now that I discovered Aliexpress has sellers that are still making Note 4 battery's fresh which means they have not degraded in capacity like all the ones on amazon and ebay). Anyhow good luck!
Link? I noticed Ravpower took down their page selling Note 4 batteries.
 

dave678

Senior Member
Aug 17, 2019
465
47
Thanks, good info. RE: Lineage, etc, there are a lot of cool ROMS out there, but in my experience, once you move away from touchwiz, there's always gonna be some functionality that you have to give up. I've been on MODestROM v11 since I got the phone, and it's been awesome. EVERYTHING works. But, like you say, it's 6.01, and we're slowly being left behind. I'm always looking for a new phone, but every time I think I'm close there's something that horrifies me about it. No charging LED???? Really???? These companies, Apple, Google, MS, Samsung, et al, have been adopting the worst of each other's anti-consumerism 'features' for decades. Apple started it. Now we have forced updates you can't roll back, bootloaders you can't unlock (thanks, Samsung) ,windows computers with no network activity indicators, no hdd activity indicators, etc. Which is fine, I guess, if you're cool with the dumbing-down of everything. I'm not. Heaven forbid we could actually replace the ONE THING in our phone that WILL fail (the battery), and get to continue working the way we want with the hw we've learned. Oh well.
/rantOff
I'm still running Kitkat and I hate how the US carriers mess with the Note 4's settings
 
Jan 12, 2023
43
6
Link? I noticed Ravpower took down their page selling Note 4 batteries.
Dave, the best battery's I have found so far (I have tried about 15-20 different aliexpress brands) are these:


Make sure you choose the NFC variety if you want to be able to use your Payment apps and other things (like nearby share). Now keep in mind that these battery's are nowhere near the capacity that they claim. I purchased a high end lithium battery stressor / capacity tester which can stress a battery up to 180watts and I tested each battery from all the different brands I purchased from aliexpress 5 times each (just to make sure I was past the break in stage of each battery) at a Constant Current of .7amps (which I found was the most accurate average that a note 4 will pull if watching videos and or gaming half the time and then just web browsing the other half) and these battery's consistently came out at that amperage with 3200ma - 3400ma capacity. The cutoff voltage was set to 2.8v which is as low as you would want to go during a stress test without damaging the battery. Anyway I say all that to say that they did seem to be the best battery's (better than original actually) even though they lie profusely on their stated capacity. I actually have another brand ordered though that seems to have good feedback so I will let you know how they go (these ones: https://www.aliexpress.us/item/2251832682489559.html?). One final note, I would tell you all is that you will make your phone last longer if you do not have to ever take it apart to replace any components (since that almost always damages the s-pen foil film behind the OLED & motherboard) and the way you do that is you keep multiple spare battery's around and only charge the battery's in a separate charger like this: https://www.aliexpress.us/item/2251832625444390.html?

Which only cost $4.20 a piece so when one finally burns up (they seem to last about a year each when plugged in 24 hours a day) you just plug in a new one and your phones charging port remains untouched! Now, I will admit though that I do not stick to this rule 100% of the time since sometimes I am using my phone as a GPS (which drains the battery hella quick) so I go ahead and plug the phone in to my car charger when I am doing so. Anyhow, I hope that helps
 

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    I have never posted here before but I nearly had to buy a new phone because the information I am about to share was not available anywhere on the entire internet even though I had to use the starting point of the above Gentleman's information. Ok so if your Verizon Galaxy Note 4 (although it may work on other carriers as well) was not previously activated in the actual android OP (within the "advanced calling" Setting) and it happens to be on an MVNO Sim card, then the above strategy will not be enough to activate advanced calling (or WIFI calling) because unfortunately these Note 4's are so old that the OS thinks that it has to connect with a 3G tower to make a handshake with your Verizon account before it can tell your OS to proceed with activating the advanced calling. So since you cannot walk into a verizon store and have an tech guru reprogram it for you without the 3G Tower handshake, what you have to do to get it to work is you have (same with Visual Voicemail by the way) to actually enter into the IOT Hidden menu (via above method and then ##433346#) and then click Data then edit and now you are in the data programming menu and then you just need to hit HDR/1X Selection and then click LTE Only Mode and save. Finally in the IMS Setting (above) you must go into the DM configuration and click the VOLTE_Enabled setting and change the 0 to a 1. Good luck and I will take questions if you need help, and thanks for finding the info above OP!
    1
    FACTORY MODE
    Enter in calculator
    (+ 30012012732+

    Diagnostic mode(enter either in calculator or dial pad)
    ##366633#

    VERIZON IOTHIDDENMENU
    ##433346#

    Band select/service mode
    *#27663368378#

    IMS setting menu
    *#467#

    IMS Settings
    - Hit the more options/three dots on upper right of screen
    - Select 'Reset to default'
    This should activate 'Advanced Calling' in the settings menu without dealing with Verizon. Keep in mind you might have to restart your phone after you reset the IMS settings to default.
    - Go back to IMS settings (*#467#) after Advanced Calling is available(you should see that HD voice and video are enabled)
    -Under IMS Setting, tap the first option “IMS Service switch”.
    -On the next screen, make sure all the toggles are on. If any toggle is off, turn it on.
    -Go back and tap “Self Provisioning”. First two options i.e. Provisioning and EAB should show “Enable”. If they show something else, tap “Toggle Provisioning” to enable them.
    -Again go back and tap “IMS information”. Verify that all the settings are enabled on the IMS information screen.
    -Restart your device.

    >Manually add the IMS APN

    1) Create an IMS APN
    Settings → Mobile Networks →Access Point Names → Add

    Select Settings and Mobile Network

    Select Access Point Names, Select Add

    2) Input IMS setting
    Name: ims
    APN: ims
    APN type: ims
    1
    Yes, it's old, but it has a lot of great features that they just don't include on new phones.
    True that. In the same boat. The ONLY things missing from the Note 4 are camera2 api and faster/more consistent GPS lock. Other than that, perfect phone for me. I got VoLTE working on VZW, but their 4G coverage blows in my area, missed/dropped 75% of calls. I have nearly everything working w/ a T-Mobile SIM, except voice calls fall back to 2G/CDMA. I'd LOVE to figure out how to get VoLTE on T-Mobile's towers, but it's still usable, since T-Mobile has great 4G LTE Band 4 coverage here, and decent 2G/GSM. So far, they have not announced end of life for 2G/GSM. I have been a VZW customer since they were Bell Atlantic, like 25 years. Had the grandfathered true unlimited data plan. Their service degradation over the last few years is inexcusable. Driving around last week w/ two identical note 4's, one w/ a T-Mobile SIM, one w/ VZW was an eye opener. Should have done this 10 years ago.
    1
    Benovite, thanks for this procedure. Do you know, by any chance,
    a) Where these settings are actually stored?
    b) Is there a way to back up/restore the settings before messing with them?

    Google search has been zero help on this. I don't know if a nandroid(twrp) backup of System/Data would save/restore all the hidden dialer menu settings. Would love to know for sure. Thanks,
    So, I know for sure that it has to be saved someone within the backup file that you can create through android because I backed up the note 4 phone that had advanced calling activated and then did a factory reset and then used odin to install the latest Stock fw file (the one from 2020 that had the better Modem FW) and as soon as I started it up with the sim card the advanced calling was de-activated and could not be re-activated through the normal channel, but then once I restored the android (or google) backup it was automatically re-enabled after the restore was complete. I suspect it is saved someone in the actually IMS settings app (it is actually a samsung app) which I discovered using activity launcher and apk analyzer. I wonder if you could use activity laucher to figure out if your tmobile version note 4 has this system app in it? If it does have this app, I actually figured out that you can unlock this hidden menu without the verizon program on your PC (you dont even need a PC). All you actually have to do is:
    Dial ##366633# on the phone then - Select the enable DM Mode on the phone, and then
    After This enter main the main IOTHIDDEN MENU using ##433346# then click
    - Data (takes you to Data Programming Screen)
    - Edit (Data Programming)
    - More (takes you to "Others" Screen)
    - Click on Global Hidden Menu Selection & Change to Enabled, and boom done your now have an unlocked IMS Service menu and if you can make it here with your t-mobile phone, then you should be able to copy all the values from someone else's tmobile VoLte working Android phone regardless of what T-Mobile tells you!

    Just in case anyone is wondering, I actually tried copying the Carrier Services APK and the IMS Settings APK from my android 6.0.1 phone (my daily driver) to one of my other note 4s that I recently rooted (thank you JKRuse for your ridiculously easy rooting instructions for MM) and installed Lineage 18.1 on (thank you very much Ripee For all your hard work there) to see if I could somehow get these system apps to get VoLte working on lineage (I know it was a ridiculous long shot) and NO JOY :(

    This was a sad thing indeed because that is the only thing about my old notes here is that I cannot use the Samsung Smart things app to see what is in my family hub refrigerator (when I am out at the Grocery store) and I cannot use the sams club Scan and Go app because both of those apps require android 8.0 and above! And if it wasn't for not being able to get SMS over IP and Voice over IP working on lineage, it would be a perfect operating system for the note 4's! The only downside I could find was that I could not get a stable 4k video (which I never use anyway because it takes way too much sd card space) and the Bluetooth is not stable. But other than that it runs sooo sooo good on the note 4! It is 10 times faster than the Stock fw and then we could use modern apps! Man I wish we could all somehow work together to get VoLte on lineage and fix the Bluetooth and then Bang we have our notes for another 6 or 7 years at least (especially now that I discovered Aliexpress has sellers that are still making Note 4 battery's fresh which means they have not degraded in capacity like all the ones on amazon and ebay). Anyhow good luck!