LTE+ and VoLTE on unlocked S9/Plus? - Samsung Galaxy S9 Questions & Answers

So I've been trying to find an answer and haven't come up with one yet. I just got a S9+ and I've been using it with Straight Talk on AT&T. I have yet to see my mobile data connection ever show LTE+. If I pop my sim into my unlocked S8 it will boot up and grab LTE+. Same location, same APN, etc. I'm wondering why I'm not seeing it? Also my Unlocked S8 for some reason has the ability to toggle VoLTE on/off. I noticed one day that I was on a call and my data stayed LTE instead of dropping to H+. I can only assume that this came from popping a friend's Verizon sim card into my S8 so he could receive the text notification to get into his email. I'm gonna try doing this with a friend's sim to see if that does anything. Mostly curious about the LTE+ though, does anyone have insight on that?

I have an unlocked s9+ on Verizon. I have the VoLTE option (under connections, mobile networks) enabled. (The toggle is not grayed out and will allow me to turn it on/off) Connection in status bar only displays LTE not LTE+. Voice calls sounds great so I'm assuming it's connecting to VoLTE for my calls.
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how to get VoLTE on SM-G965U

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Does the N930FD have the option to enable wifi calling

Hello, can anyone tell me if there is an option to enable wifi calling on the N930FD. If there is, it should be found in the dialer>3 dot button>settings then scroll to the bottom. Thanks in advance.
Sent from my SM-N930W8 using XDA-Developers mobile app
Is this for T-Mobile? Were you able to use wifi-calling eventually?
No I was asking for Rogers in Canada. However, since there were no responses I stayed with the N930W8 Canadian model because wifi calling is a must for me due to poor reception in my area.
balpreetsaini said:
No I was asking for Rogers in Canada. However, since there were no responses I stayed with the N930W8 Canadian model because wifi calling is a must for me due to poor reception in my area.
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If it's like the S7 Edge Duos then the sim card that you want to do wifi calling from has to be in sim1. If you put it in the sim2 slot then it won't work. I don't remember why this was as I returned the S7 version in favor of the Note 7 and just getting it unlocked ASAP.
If you have the setting I should think so. Open your dialer app and go to settings, it should be the bottom setting. I know it is with mine here in the UK.

How to enable VoLTE on Pixel?

Hi guys.
Let me elaborate my question.
1. I am totally aware that VoLTE on Android at the moment generally requires the handset to be from the carrier, or from the same region as the carrier for it to have the correct VoLTE (and VoWIFI) settings.
2. I am also totally aware that since Android 6.0, there actually has been a provision to allow carriers to send carrier settings to the user. I also know that this isnt being widely used.
After my ownership of my Pixel XL, I moved to a HTC U11, which I have flashed a custom ROM. This custom ROM managed to have the carrier settings for VoLTE for my carrier baked in.
I am keen on getting a Pixel XL2, so Im keen to see what the Pixel community is doing to enable VoLTE on networks that arent stocking the Pixel or Pixel XL.
Here in Australia, both generations of the pixel seem like they will be Telstra exclusives. and I am not inclined to go on their network!
Thanks for any assistance!
I use it with T-Mobile, only Verizon stocks it in the States. Volte works fine for me. Nothing i needed to do other than to setup the phone with the Sim card in the device.
Same here, got it with my T-Mobile SIM card.
This worked for me. Go to dialer and dial
*#*#4636#*#*
Phone Information
Turn on VoLTE
Turn on Video Calling
Turn on Wi-Fi Calling
Exit
I'm on Oreo 8.1 on my P2 XL, looks like it's already enabled. I'm on AT&T.
View attachment 4317129
Change carrier. AFAIK you'll never get enhanced LTE services using a non-AT&T branded phone on their network. Once I switched my pixel xl to T-Mobile things like that and wifi calling worked fine.
My condolences to your Pixel XL 2. I was in a Verizon store the other day just to check out PXL2. The blue tint when turning the phone horizontally - horrific. Also, barely faster than my Pixel XL, even if you care for that kind of thing (speed.)
CHANGiism said:
This worked for me. Go to dialer and dial
*#*#4636#*#*
Phone Information
Turn on VoLTE
Turn on Video Calling
Turn on Wi-Fi Calling
Exit
Click to expand...
Click to collapse
Same problem in Argentina, Pixel is NOT SOLD here so.... out of luck, but I tried this (already knew of the menu) and all my options are blacked out -can't enable any of them-, advice?????
Thanks.
If you can get root on your phone, flash magisk and there is a module in there to install that can enable VoLte and Wifi calling, worked for me on AT&T.
loeffler23 said:
If you can get root on your phone, flash magisk and there is a module in there to install that can enable VoLte and Wifi calling, worked for me on AT&T.
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I need to try this when I get home. I get nowhere with ATT
LubbocksFall said:
I need to try this when I get home. I get nowhere with ATT
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Click to collapse
the module only changes the settings to allow for toggling but does not provide needed ims libraries.
CHANGiism said:
This worked for me. Go to dialer and dial
*#*#4636#*#*
Phone Information
Turn on VoLTE
Turn on Video Calling
Turn on Wi-Fi Calling
Exit
Click to expand...
Click to collapse
I had to toggle VoLTE off then on, restart. It's working for me now
"Turn on Video Calling"
Option is disabled, couldn't turn on
Depends if you're on Verizon or straight talk or what. I'm on straight talk and they don't offer VOLTE even though they use Verizon towers.
Using *#*#4636#*#*, the VoLTE provisioned option is greyd out. Anyone has a solution for this?
HSOC said:
Using *#*#4636#*#*, the VoLTE provisioned option is greyd out. Anyone has a solution for this?
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Click to collapse
It means your operator is not offering VoLTE, or, as in my case, Pixel XL is not approved by the operator. I have VoLTE on my SIM enabled and working with operator approved devices but network rejects Pixel as not compatible one.
ylapas said:
It means your operator is not offering VoLTE, or, as in my case, Pixel XL is not approved by the operator. I have VoLTE on my SIM enabled and working with operator approved devices but network rejects Pixel as not compatible one.
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Click to collapse
Operator offers VoLTE and it doesn't filter IMEI like in some cases. Other not approved devices (e.g xiaomi, oneplus) managed to enable volte via shortcuts. I am asking for a similar workaround. --thanks
Of you're on Straight Talk you're SOL. They don't offer it even if you're using a Verizon SIM
If you had geryed provisioning options you need to use magisks voenabler. a did it right now on december pie update. Now I have all enabled. Just waiting for operator to enable volte for my number. I wonder it will active.
Hi, my carrier does support VoLTE but the Pixel is not on its whitelist.
When dialing *#*#4636#*#* and going into phone info, the switches for "VoLTE Provisioned" is off and greyed out, but at the top of this screen I see "Voice Network Type: LTE". Does that mean I am getting VoLTE? I cannot see any other sign or symbol when calling. (I know some devices have a VoLTE symbol either in the status bar or during a call)

Wifi calling galaxy s9 unlocked t mobile

I wanted to let everyone know that Wi-Fi calling works on the Galaxy S9 unlocked lock version with T-Mobile
thanks but how do you know... i have unlocked s9 that i got from samsung but i can not tell if wifi calling is working. i am with t-mobile.
bobwal70 said:
thanks but how do you know... i have unlocked s9 that i got from samsung but i can not tell if wifi calling is working. i am with t-mobile.
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Because I turned it on after I put in m t mobile sim card and used it.
How do I turn it on/off. I havent found it yet, but it is fixed to my notifications bar, and I don't want it there.
Thank you for confirming. Are you able to confirm a couple of other things?
VoLTE?
RCS Messaging? (I think there should be an advanced setting to enable this).
Band 71 available?
I am trying to figure out if I buy and unlocked phone from Samsung, and flash the TMO ROM, or buy the carrier version and clean up the bloatware (I keep my phones so resale value doesn't matter so much for me)
aqj123 said:
Thank you for confirming. Are you able to confirm a couple of other things?
VoLTE?
RCS Messaging? (I think there should be an advanced setting to enable this).
Band 71 available?
I am trying to figure out if I buy and unlocked phone from Samsung, and flash the TMO ROM, or buy the carrier version and clean up the bloatware (I keep my phones so resale value doesn't matter so much for me)
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Click to collapse
I don't know about Volte,The phone does not let me select LTE alone. I can not tell RCS messaging don't know anything about that. Ban 71 is supported
tcabrino said:
How do I turn it on/off. I havent found it yet, but it is fixed to my notifications bar, and I don't want it there.
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I have found the only way to turn it on or off is through the notification bar an then it opens the window to change wifi call settings, I am still looking.
This is what I also found: go into the dialer, top right hand corner are three buttons touch that go to settings, and you will see wifi calling listed and you can turn it on and off in there, too.
uzupan said:
I have found the only way to turn it on or off is through the notification bar an then it opens the window to change wifi call settings, I am still looking.
This is what I also found: go into the dialer, top right hand corner are three buttons touch that go to settings, and you will see wifi calling listed and you can turn it on and off in there, too.
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Click to collapse
Thanks! Was just trying to find something like this as now that I turned it off so it's not on the notification bar, I still know how to turn it on.
Is there any chance you could post a screen snaps of your unlocked S9 with T-Mo SIM on the *#2263# band support screen? On the T-Mo phone at least they turn down LTE Band 28 and UMTS Band 8 whenever you pop in a T-Mo SIM but open it up when you insert another carrier SIM. Since I can flash the unlocked firmware on my T-Mo device, this would be a great work around if those two bands persist!!
Apparently without those bands, roaming sucks in AUS and NZ, and without B8 UMTS parts of Europe (esp. South France) loses coverage.
Thanks in advance, as well as for the Intel! I do know you lose native digits support and video calling from the dialer, but those features don't matter to me as long as WiFi calling works which you proved.
Attaching my band list, as you can see no B28 or B8 UMTS
Regards,
PaulView attachment 4451000
Sent from my SM-G965U using Tapatalk
hofopds said:
Is there any chance you could post a screen snaps of your unlocked S9 with T-Mo SIM on the *#2263# band support screen? On the T-Mo phone at least they turn down LTE Band 28 and UMTS Band 8 whenever you pop in a T-Mo SIM but open it up when you insert another carrier SIM. Since I can flash the unlocked firmware on my T-Mo device, this would be a great work around if those two bands persist!!
Apparently without those bands, roaming sucks in AUS and NZ, and without B8 UMTS parts of Europe (esp. South France) loses coverage.
Thanks in advance, as well as for the Intel! I do know you lose native digits support and video calling from the dialer, but those features don't matter to me as long as WiFi calling works which you proved.
Attaching my band list, as you can see no B28 or B8 UMTS
Regards,
PaulView attachment 4451000
Sent from my SM-G965U using Tapatalk
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Attached is the screen shot of my hidden menu on my unlocked Galaxy s9 with the TMobile sim card inserted, hope this helps.
uzupan said:
Attached is the screen shot of my hidden menu on my unlocked Galaxy s9 with the TMobile sim card inserted, hope this helps.
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That's strange--the unlocked model is showing one less band than T-Mobile, LTE 46 which is for LTE LAA on the unlicensed 5GHz band. Thank you for the snap, much appreciated!
Sent from my SM-G965U using Tapatalk
Are you able to enable "Cellular calling preferred" in the wifi calling options? After enabling this option while on wifi instead of "Wifi Calling Preferred" the phone reverts back to wifi calling turned on even though I had chosen "Cellular calling preferred".
Does this happen to you? It still happens to my S9 unlocked and also the Note 8. Called Samsung about it but doesn't seem like anyone bothered to fix this.
hofopds said:
That's strange--the unlocked model is showing one less band than T-Mobile, LTE 46 which is for LTE LAA on the unlicensed 5GHz band. Thank you for the snap, much appreciated!
Sent from my SM-G965U using Tapatalk
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Click to collapse
Yes, there are a few bands not showing that the unlocked version supports. Samasung tech told me it is SIM specific, if I had an attitude SIM in the phone it should show the bands that ATT uses such as band 30.
The unfortunate thing is that TMobile SIM is disabling B28 and UMTS/WCDMA band 8 which are valid roaming bands for other carriers that TMobile can roam on. The AT&T SIM actually enables those bands, as do international SIMs. It seems like a strange oversight / mistake?
Sent from my SM-G965U using Tapatalk
ihaveabu said:
Are you able to enable "Cellular calling preferred" in the wifi calling options? After enabling this option while on wifi instead of "Wifi Calling Preferred" the phone reverts back to wifi calling turned on even though I had chosen "Cellular calling preferred".
Does this happen to you? It still happens to my S9 unlocked and also the Note 8. Called Samsung about it but doesn't seem like anyone bothered to fix this.[/n .
I do have that option and I just tried it and it turned my Wi-Fi calling off.
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uzupan said:
I do have that option and I just tried it and it turned my Wi-Fi calling off.
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Yea let me know in 10-15 minutes if it goes back to Wifi calling. My phone will do the same. It'll switch to cellular calling but switch back to wifi calling in a few minutes on its own
It has not switched back yet.
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ihaveabu said:
I just turned mine on 5 minutes ago. My notifications now shows Calls will be made over Wi-Fi.
If I toggle wifi calling on and off again it'll go away and go back to cellular calling.
Do you have Keep Cell Data on enabled in developer settings? I don't have developer settings enabled at all so maybe that has something to do with it?
---------- Post added at 01:11 AM ---------- Previous post was at 01:07 AM ----------
Just tried again same thing. Wifi calling gets enabled on its own, this time 3 min after I retoggled it to Cellular preferred
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Wow, that is weird. I just rebooted my phone, wifi calling is still turned off. I did not change it in developer settings.
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Not getting VoLTE on T-mobile on XT1710-06 version

Is or has anyone else been able to get VoLTE working on T-Mobile US on this model specifically? LTE and WiFi Calling work in general, but the "Enhanced 4G LTE Mode" toggle isn't there to allow VoLTE. The model has the same number of bands as the XT1710-01 model, but is on the RETLA channel, by the way.
Hi, actually I was having similar issues. VoLTE, seems to be different but is based on your Carrier mostly. If you call someone from a different carrier it may not be enabled. I'm with AT&T, whenever I call someone with AT&T and we are both with good 4g LTE, in the call, changes the status to HD. But, just with AT&T. At least that's how it Works for me. We should wait someone to confirm is this is how other carries behave.
Vesaniaheim said:
Hi, actually I was having similar issues. VoLTE, seems to be different but is based on your Carrier mostly. If you call someone from a different carrier it may not be enabled. I'm with AT&T, whenever I call someone with AT&T and we are both with good 4g LTE, in the call, changes the status to HD. But, just with AT&T. At least that's how it Works for me. We should wait someone to confirm is this is how other carries behave.
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Click to collapse
Apologies for the late reply. Definitely no VoLTE or HD voice between me and other T-Mobile users. No matter what I tried it just never came up. If anyone's considering using this specific variant of the phone in the US, I'd be aware of the limits beforehand.
politiclaw said:
Apologies for the late reply. Definitely no VoLTE or HD voice between me and other T-Mobile users. No matter what I tried it just never came up. If anyone's considering using this specific variant of the phone in the US, I'd be aware of the limits beforehand.
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Click to collapse
-06 is a North American dual sim variant, correct?
Are both SIM cards on t-mobile?
Could one use SIMS from different carriers?
pizza_pablo said:
-06 is a North American dual sim variant, correct?
Are both SIM cards on t-mobile?
Could one use SIMS from different carriers?
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Click to collapse
-06 is a North American dual sim variant, correct. Updates should go through ATT Mex, I believe. And yes, you can use sims from other carriers. I used one sim card when I tried it and only utilized one of the sim slots as a result. T-Mo VoLTE just doesn't seem to have been certified for that variant.
So T-Mobile WIFI calling works on this variant of the Z2 Play? If so that is good to know especially when traveling overseas even if some other advanced features don't work.
I have an XT1710-06 retla device and I can confirm that wifi calling with T-mobile does *NOT* work on my device. There is a setting to enable wifi calling, but it never seems to connect and all calls still go over mobile. This is 100% testable if I for instance go into a deep basement that has wifi but no cellular signal -- I can browse the internet but cannot make phone calls or SMS, even though I have wifi calling turned on.
This is probably related to why VoLTE doesn't work either.
Also (as mentioned in another thread) still no updates for it past February 7.1.1 update. No later security updates and no Oreo updates.
Vesaniaheim said:
Hi, actually I was having similar issues. VoLTE, seems to be different but is based on your Carrier mostly. If you call someone from a different carrier it may not be enabled. I'm with AT&T, whenever I call someone with AT&T and we are both with good 4g LTE, in the call, changes the status to HD. But, just with AT&T. At least that's how it Works for me. We should wait someone to confirm is this is how other carries behave.
Click to expand...
Click to collapse
Hi,
I'm super curious how did you get your Z2 Play to have VoLTE. I 've tried everything - new sim, IMEI of ATT branded phone, activated SIM on ATT phone, etc. , to no avail. I'm so frustrated and about to get another phone, because my HSPA signal is much weaker than LTE where I'm at and constantly have missed (straight to voicemail) or dropped calls. Please, let me know how did you get it to work.
Thanks
Maybe the problem is VolTE itself. As I tested. Unless both phones are with the same carrier and working good over 4G (good signal area) you can't get it working. At least in where I live that was true for a friend's phone and mine. So VolTE was good, until signal dropped hard. But impossible to work with other carriers.
Even it was good under Lineage OS and tested with Toxyc OS, but I saw the main thing is that 4G LTE should be firstly working fine. And same for anyone you call. Otherwise call will be normal. And for 4G LTE it depends on area support too.
Sorry for late reply
G1Hope said:
I have an XT1710-06 retla device and I can confirm that wifi calling with T-mobile does *NOT* work on my device. There is a setting to enable wifi calling, but it never seems to connect and all calls still go over mobile. This is 100% testable if I for instance go into a deep basement that has wifi but no cellular signal -- I can browse the internet but cannot make phone calls or SMS, even though I have wifi calling turned on.
This is probably related to why VoLTE doesn't work either.
Also (as mentioned in another thread) still no updates for it past February 7.1.1 update. No later security updates and no Oreo updates.
Click to expand...
Click to collapse
Same phone (XT1710-06 retla, rooted stock ROM on Oreo), and wifi calling on Tmobile also doesn't work for me. I can enable it in Settings, but I cannot send SMS or make calls over wifi with no cell service. After a while (a few hours) I get a Moto Settings notification that it can't enable Wifi calling, with a message underneath that says "Enabling." I can't dismiss the notification, only snooze it for up to 2 hours, and after I disable wifi calling it does eventually go away after a couple days.
Your problem is because none of the XT1710 variations have the 600MHz Band 71. It is the most recently added band and very few phones currently out there support it yet. As far as the HD voice issues mentioned...both people on the call have to be using a Volte supported phone and then HD automatically activates.

Can't connect to mobile network.

I have a pixel 3xl, up to date stock non rooted, on straight talk lte/cdma Verizon network. I got a text saying straight talk now has VoLTE so I tried to find it in settings but there's no option for it. When I search it it comes up but when I click it it goes to mobile settings and it's not there I did the *#*#4636#*#* and it's also grayed out there. I changed the network mode in that diag screen to lte/cdma to see if that helped, was on global before i think. Still no VoLTE and for some reason I can't make calls. I have data, can send and receive texts but when I go to call it says no network. Removed Sim card didn't fix it, restarted it. Safe mode doesn't help either. Tired clicking trigger carrier provisioning, updated the smsc. Change mobile network to lte only, back to global, lte/cdma. I have no idea what else to try. Straight talk is basically useless for customer service so I haven't even tried yet lol.
Update!! It works!! Somehow I either damaged my sim card when I switch from my pixel 2xl to this 3xl and it somehow lasted till now. Or when I changed my network settings something wrote to the sim?( And it messed it up?? IDK much about how the phone and sim interact with each other)... But I did have a 2 year old sim card, it did not have VoLTE or wifi calling capabilities I now realize. So I bought a new SIM card at Walmart and activated it though the straight talk app on my account and kept the same number. Works perfectly and I now have VoLTE, no wifi calling yet but the option is now there and lets me click it but it fails. Doesn't matter to me, I'm just happy to have VoLTE. I'm leaving this post because straight has horrible customer service and I could find anyone who ran into this specific issue.

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