yashsingh1/xdaforums huggingface dataset:
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
About as sure as I can be w/o testing it myself. lol

ALL like 4-5 sites online that I checked all say the XZ1 Compact has it. Android Headlines was the one that said BOTH have it.

You wouldn't see any user experience supporting that as of yet because the phone (XZ1C) doesn't even get released 'til 10/4.

Well normally those internet articles, if from reputable sites like Android Headlines and The Verge (even if I hate The Verge normally lol), ARE factual and have direct ties with key Sony personnel to verify this stuff. So I don't know what's going on now. Either Android Headlines is right or else the other sites are right. So this is really ALL we have to go on right now since people are still gathering information or else waiting for their XZ1 phones to arrive. I'm only concerned with the XZ1, so of course I'm open to user experience, but then again, someone could just come on here and lie too. That is why I try to take everything into account before deciding how to move forward.
[Sony Xperia XZ1  Questions & Answers] hnt20:
Thank you RockStar2005, fully understand your point, however, i would really like user experience rather than sites opinions even if the sites are reputable. The problem is not from the sites, rather, from Sony itself not delivering, hence, user experience and facts. As you said, XZ1C is not even released and sites are talking about VoLTE, so, cannot really trust such sites.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
No problem hnt20!

Well, you keep referring to these sites as "opinion sites", but these are not blogs. These are sites where the authors actually speak directly TO Sony, so they are supposed to be fact. Now maybe the Sony contact they have is more than one person, or THAT person got misinformation? We don't know, which sux, but normally like 98-99% of the time what these sites publish is fact.

User experience is great too but I've seen 2 or 3 different users all have different experiences too, so even that's not really 100%. lol

Yeah but they also mention getting such confirmation directly from Sony, or this is assumed. TMoNews actually said:

"Finally, Sony has confirmed to me that the Xperia XZ1 Compact has been certified to work with T-Mobile’s VoLTE and Wi-Fi Calling in the U.S."

Right now I'm honestly leaning more towards the LG V30, but I'm still deciding. It seems to be a better phone overall, even though I prefer Sony's UI to LG's.
[Sony Xperia XZ1  Questions & Answers] TX-Brad:
OK, so phone (XZ1 Compact G8441) has arrived. Inserted SIM card, went through normal set up, blah, blah blah.

I cannot find a setting to switch on/off VOLTE, HOWEVER, made a test call and the phone immediately dropped to 3G, suggesting it does not support T-Mobile VOLTE.

Also, Spectrum Gateway suggests it supports WiFi calling, but again, no setting for it.

Thoughts/suggestions/ideas?

I'm a Sony fan, so really want this to work, but starting to have doubts.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Brad,

I'm confused........... I thought you were getting the regular XZ1, not the XZ1 Compact?!!!

Also, how did you even get the XZ1 Compact now?! It doesn't get released 'til next month.

Please answer both questions.

Thanks!
[Sony Xperia XZ1  Questions & Answers] rp3:
I am going to go through the same issues as you next week as I ordered a XZ1C for a Tuesday Delivery.

I think you need to install the US Rom listed below. Quite likely this means losing fingerprint capabilities for now.

https://xpericheck.com/cda/1310-4371

I started a thread in the XZ1C forum with an ambitious idea (that is above my skill set) about porting Tmobile VOLTE settings to other Android 8.0 phones. That's where others posted some info about which rom contains VOLTE and how its set.

https://xdaforums.com/xperia-xz1-compact/help/porting-t-mobile-volte-t3670023
[Sony Xperia XZ1  Questions & Answers] shilent:
Yes I did. It's been a while so I don't remember exactly what the issue was, but I believe it was because I had the wrong mix when flashing.
[Sony Xperia XZ1  Questions & Answers] Aertus:
does the international version of the xperia xz1 have VOLTE. Or is just the USA version? Or is it both dont have it?
[Sony Xperia XZ1  Questions & Answers] Aertus:
i have US version of xz1 G8342 and i would like to enable VOLTE and WIFI calling without breaking anything in the phone and having it work properly. Is this possible?? I have never flashed anything before in my life. But the issue if being stuck with an xz1 without these things is really annoying.
[Sony Xperia XZ1  Questions & Answers] SingingSam:
This is my first and probably last post to this forum.

I'm writing to confirm that the stock US Customized firmware, latest version (47.2.A.11.228) for the XZ1 dual sim (G8342) and XZ1 Compact (G8441) downloadable at XperiFirm support VoLTE and VoWiFi in my US version of the XZ1 (G8342).

As is well documented earlier in this thread, all you need to do is replace the oem*.sin file from the G8342 firmware with the oem*sin file from the G8441 firmware. Then flash with Newflasher. If you need more details, then this discussion thread will guide you.

I'm grateful to all who have posted constructively to this thread.

To anyone who at this late date has an XZ1 and needs VoLTE support that works with T-Mobile and T-Mobile resellers, everything you need to know is in this discussion thread. Start at the beginning and read patiently. There is a massive amount of false and misleading information online about the XZ1 as it relates to VoLTE. Everything you need to know is in this thread.
[Sony Xperia XZ1  Questions & Answers] TX-Brad:
NP...

For clarity, I ordered the XZ1 G8342 from Amazon on the weekend and received it Monday. That's when I did a quick test to confirm I had B12 on T-Mobile, but decided the phone was too wide, so processed a return.

I then ordered the XZ1 Compact G8441 from a seller on eBay and received it today.

Sorry for any confusion.

---------- Post added at 04:56 PM ---------- Previous post was at 04:53 PM ----------

So, more than likely, IF T-Mobile certified the XZ1 Compact, it would be the US Rom, so at the Rom level, not the model number level?

Also, confirming the fingerprint sensor does work now.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Brad,

Ok. So as far as you're concerned, even though you do not recall seeing VoLTE in the Settings, you still verified that the XZ1 could use Band 12 then. What about on calls? Were you switching to 3G or even 4G from 4G LTE, or staying on 4G LTE??

Oh Lord.........so the implication is you have to flash the U.S. ROM in order to get VoLTE? But then you lose the fs?!! OMG this is BS! I don't want the U.S. ROM if I lose the fs, which I surely will.

FS works on which ROM? Int'l or U.S.??

FML lol

---------- Post added at 10:19 PM ---------- Previous post was at 10:12 PM ----------

Brad,

Can you further clarify what you meant by "the XZ1 switched over to Band 12 and stayed there."? Were you using an app to detect Band 12 like the one I use, LTE Discovery? Or did you have some other method of verifying that not only was the phone detecting Band 12 but using it too? This is why I really wish you had a screenshot of your Settings, because then it would make more sense if VoLTE was listed there. I don't know how it's possible on T-Mo to get Band 12 w/o VoLTE, and I can't confirm you had it either. So this is why I ask.........to find exactly how or what you used to confirm you had and kept Band 12 when you drove up further north.

Thanks!
[Sony Xperia XZ1  Questions & Answers] TX-Brad:
So I have to assume the XZ1 in my hand is on an Int'l. ROM as it is an Int'l. phone. Confirming when I make a call, it drops from LTE to 3G and H+ (bounces between them during a call). Also confirming that there is noting in settings for VoLTE; also no settings for WiFi calling. I would have to agree with you that I'd probably have to flash a US ROM which I'm not about to do.

Going back to the XZ1 (the one I returned to Amazon), it WAS a US phone, so assume it had a US ROM. Confirming I used LTE Discovery to identify the band I was on; B12; when I was on the north side of town. What I unfortunately did NOT do, was make a call to confirm whether or not it dropped to 3G or 4G while on a call as I quickly decided the phone was too wide.

IMO, the Xperia Z5 was one of the best phones I've owned, but with minimal ability to perform on T-Mobile networks, I went to the GS8 in the spring, but so want to go back to Sony.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
I think you meant the "XZ1 COMPACT in my hand"? lol Yeah your XZ1C def doesn't have it. Maybe it's U.S. only then, yeah. But we still have no confirmation of that either except for what's been said on those tech sites. That's crazy that you got it so early though! F'in' eBay. lol

Ok I use LTE Discovery too, but I don't want to assume that just b/c it was detecting Band 12 that your phone was ACTUALLY utilizing it too. So yeah, b/c you didn't confirm VoLTE in the Settings nor did you place a call while Band 12 was detected, I really can't say for sure you had it or not. It's ok though as you didn't know. I just wish I could've gotten to you b4 you returned it. lol

Yeah.........I gave Samsung TWO (actually 3) chances...........the S5 (returned after only 4 days lol), the S7 Edge (kept it 2 weeks then....), the S7 as the S7 Edge was just too big. Kept the S7 for 4 mos.........man by like a month in I knew I was done with Samsung. lol But I had to wait for new phones to come out so held on to it 'til the X Performance came out in June ('16). But then THAT turned out to be the most disappointing Xperia phone ever. lol They went from Battery KINGS with my old Z3 to Battery JOKESTERS with the X Perf, which was like the worst-rated flagship phone for battery life that came out last year. However, the XZP and XZ1 (as well as XZ1 C) prove Sony has this back in order again, though I'd still prefer they use no less than a 3000 mAh battery on their flagships. The XZ1 and XZ1 C have the same 2700 mAh battery size. To me that is BS, even if the battery life is rated great on both. But I get what you mean............I would rather get an iPhone I think than go back to Samsung. The only thing I miss about Samsung was Samsung Pay. lol

Is anyone else in here getting the XZ1 (not XZ1 C) and uses T-Mobile?? Or has it already + T-Mo? If so, please let us know if you see VoLTE in the Settings menu.

Thanks!
[Sony Xperia XZ1  Questions & Answers] 1230m:
Welp, boys and girls, I hate to be the barer of bad news, but I think all articles were incorrect. I talked with a regional support person from Sony today who told me that neither phone is certified in the USA, with any carrier, and the phones are only certified with some other (non-USA) carriers in the world.

I kept the transcript. Here is the relevant bit:

"At the moment we don't have any information to when Sony will released devices branded to any carrier in the US.

Once they do it will be announced right away"

"I'm sorry but this feature is available on the model number of other regions because they are branded to certain carriers that offer these features for them. I will provide this feedback to our higher management to see if this can be taken in consideration"

[The feedback she is referring to is my recommendation that Sony put out a statement to correct all the misinformation on the internet]

This is the page where I submitted my question:

https://support.sonymobile.com/global-en/contactUs/

I know this is not first-hand user experience, but this was an actual Sony representative and she seemed reasonably certain that neither phone is certified with T-Mobile USA.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Where is the transcript?

Anyway, ok. Well, unless something changes, the odds of me getting the XZ1 are now 0%. lol F U Sony Mobile. Seriously, F U.

Thanks 1230m! I dunno how you got through to someone ACTUALLY "in the know", but glad you did. Maybe in 2018 Sony...................................................MAYBE. lol
[Sony Xperia XZ1  Questions & Answers] 1230m:
Sorry! I accidentally hit submit before I had a chance to copy and paste! >.< My mistake. It should be updated now.

Yeah, that's lining up the last nail in the coffin on these phones for me too.

I was checking out the Sony Mobile Developer page and noticed it was run by what seemed like legit-Sony people/profiles. I checked out the mobile developer support forums, looking for some stuff on XZ1(C) & Tmo, and perhaps contact information. Not sure I found anything exact, but found a Sony support person responding to a similar question, where he said to use (and linked) that local/regional support page (Which seemed to have an actual dedicated support group and EVEN a dedicated Xperia support toll-free number. I didn't call this specific Xperia line, but was surprised to see so much actual support from Sony themselves since it normally seems impossible to talk to real-live Sony connected people, at least in the USA).

In addition, to suggesting an official statement, I also mentioned that it'd be great to have Sony handsets in the USA that actually worked in the USA.

Edit Sidenote: I saw an XZ Performance in Best Buy recently that didn't have the fingerprint scanner button, at all. It didn't even have a spot/mold where it would go in the case, it was like an entirely different case. Instead of the scanner-power button, there was a small, cylindrical button that had a power symbol etched into it (about the size of a match-head and protruded several millimeters, sticking out much more than the fingerprint button). It really made the phone worse in my opinion, I would rather have a normal scanner-button that didn't scan. Why would they do that? My speculations are to 1.) prevent people from flashing different ROMs to enable it in the USA (to prevent being sued? No one knows why they don't have scanners in the USA, but I think the general speculation is copyright and/or contract related things somehow?) and 2.) (also factoring in no USA certifications another year in a row) I fear they really are bailing on the USA market and just trying to grab some extra revenue, while that ships sinks, and only catering to markets they plan to stay in long-term.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
No problem! Just read it now. Interesting. Can't believe MULTIPLE online publications had it wrong. I mean that NEVER happens! lol

When I didn't have Band 12 it didn't matter, but now that I finally do in my area, it's become an automatic deal breaker.

That IS impressive. Yeah I never felt they had much support here in the U.S. either. I just don't get them. Sony is a KING, but their Sony Mobile business acts like a bunch of pu$$ies when it comes to the U.S. They should be RUNNIN' things here, not OVERRATED Samsung and Apple. Their phones are always the best looking, they MAKE the cameras for all the other big phones, they have arguably the best non-stock Android UI, the first 4K (Z5 Premium) and first 4K HDR (XZ Premium) flagship phones, etc etc. In other countries like Sweden, this girl I know there told me Sony and Samsung are like equals there, b/c Sony ACTUALLY advertises there. They ACTUALLY sell through carriers. It's like, you're a GD LEGEND, so stop acting like a little b*tch and take back the throne! F!! lol

Well I'm glad you did that. It's bad enough these companies give other countries extras like headphones, earphones, etc that we never get (though LG on the V20 included premium B&O earphones, and are to again with the V30 I believe). But to disable the FS and not certify VoLTE with T-Mo, that is some braindead BS.

I found out my unlocked HTC 10 got VoLTE-certified by seeing it online. It was simple. Read article, assume it's correct and verified, and so I bought and still own the 10. That's what I thought was happening when I saw the Android Headlines article. Guess not. It's even worse that all of them said the XZ1C had it but now Sony Mobile says no that's not true either. I mean that's REALLY bad. lol

I've been eyeing the V30 too, but not gonna pay $800 for the T-Mobile variant. If the cheaper unlocked V30 has VoLTE-certification, I may get it. Not sure yet, and still trying to verify it will. Prob gotta wait 'til it gets released next month and check with someone on here, etc. Or may just keep my 10 'til next year since I only got it in January. We'll see.
[Sony Xperia XZ1  Questions & Answers] 1230m:
They've been switching over to band 12 near me too. So, yeah, I basically cannot get the XZ1/XZ1C, unless I just wanna look at it. I didn't have band 12 in my area last year, so guess I woulda been better off with the XZ. Maybe I shouldn't have waited and held out. You sure you wanna wait until 2018, Rockstar? Sony Mobile USA might be shipping literal rocks by then.

Yeah, I'm not sure either. I've always liked Sony. My only thought is, that about 10-15 years ago Sony, Samsung and the likes were ducking it out in the TV arena. And most Americans decided they liked Samsung better (Why? I don't know? Cause that was the trend/rumor? I mean, I always thought their TVs were similar in price and quality ... except, even to this day, I think Samsung products look SO cheap -- that shiny, cheap looking and feeling black plastic?? Barf). I think that's when Sony really started slipping in the USA market (I was young, but I think during the 90s and early 2000s they were pretty dominant via cameras/camcorders and music devices). Then, unjustified in my opinion, they started to game a reputation of stinking/not having their act together (I seriously don't know what the basis for this was, minus maybe their odd company structures and random-poor upper management system, but I didn't think those things affected their product quality too much, at least back then... lol, Ima kinda eating my words now). But, yeah, I feel like they kinda just accepted it and gave up real fast.

Yeah, I tried to stress that the general consensus on the web seems to be that one or both were certified and that some people were buying the phone based on that (or have already)... based on incorrect information, that loads of people then played "telephone" with. Sony could easily have lots of upset customers and may lose some of the remaining USA customers they have left.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
I owned the X Performance last year. But I had the int'l version. So being that you saw it in Best Buy that is for sure the U.S. version. So d*mn, they put the OLD Xperia power button on the U.S. X Performance?! Wow...........new low Sony. NEW low. lol

I'm going with #1, fear of being sued.

I've heard 2 different reasons for the FS BS in the U.S.: 1) HP owns the copyright to that specific technology, and so Sony doesn't wanna pay them for it in the U.S. 2) A contract that Sony had with Verizon back in 2015 prevented them from doing certain things, like enabling the FS on the U.S. Xperias UNTIL the contract expires by January 2018.

At this point, I have no f'ing idea which one it is, or if either are even legit. But I think I'm gonna b*tch Sony out now via chat lol...............
[Sony Xperia XZ1  Questions & Answers] 1230m:
Oh, okay? That button was probably from the old xperias? I've never had a Sony phone, I've just been eyeing them for about two+ years now. Thanks for the insight.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
lol...........Well when I say will wait I don't mean I won't consider other options, like the V30 for example. Yeah who knows? I'm hoping with this big talk about redesigning their look that they also redesign their sh*tty attitude too. lol

I just sent them an e-mail lol:

"Why does the international unlocked Sony Xperia XZ1 NOT have VoLTE-certification with T-Mobile? I mean, seriously. Why would you not offer that to the T-Mobile customers like myself?

I just want you to know that I was intending on buying this phone UNTIL I found that out. Now I'm definitely not. You fail to understand that T-Mobile REQUIRES VoLTE-certification to use Band 12 (700 MHz) spectrum on their network, so with this phone, I would NOT be able to fully utilize their network. This is absolutely unacceptable. I've owned two of your phones, and it\'s likely there may never be a third."

Yeah man, back in the 90s and before, Sony was KING. IMO, in the 2000s and even now I consider their TVs superior to Samsung's. I couldn't agree more with your "Samsung cheap plastic" look comment, esp when I remember that horridly ugly plastic S5 I used to own. lol The reason for Sony Mobile's failures lie in poor upper mgt as you said, and also poor decision-making, and NO BALLS. It sickens me that they're so weak over here and people think Sam-DUNG is so great.

Well if that happens, they f'ing deserve it. Someone at Sony Mobile f'd up BIG time cuz I don't believe for a second all these sites got this from unauthentic sources.
[Sony Xperia XZ1  Questions & Answers] hnt20:
thank you for sharing your experience. this is really done by Sony and not T-Mobile certification. OnePlus5 comes from China right away and they don't certify their phone with T-Mobile and yet, VoLTE and VoWiFi works out of the box. clearly sony is to blame for this.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Sure no problem.

Yeah the older Xperias had them, like my Z3. And the newer lower-range ones did too, like the 2016 Xperia XA (which was a notch below the X, and 2 notches below the X Performance.)

I had the Z3 and it was like the best phone I've ever owned. It was just incredible. After that they went downhill, and now are back on top for the most part, but this VoLTE thing really killed it.

---------- Post added at 03:25 AM ---------- Previous post was at 03:17 AM ----------

Yeah the OEM has to pay and spend time waiting for the certification to go through. Sony is just cheap. That's that.

I just helped my dad get the OnePlus 5 and yes it has VoLTE and Wi-Fi Calling (on T-Mo) listed, and I made sure to enable VoLTE for him. I don't think it could work w/o them certifying it, so I'm going to assume they did. The article I think just is trying to keep it simple, but again I don't think it's possible unless OnePlus certified it ahead of time:

"It has even been optimized for T-Mobile's Advanced Calling features, including VoLTE (Voice over LTE) and VoWiFi (Voice of Wi-Fi), which are configured and enabled out of the box. Just pop in a T-Mobile SIM and it should work."
[Sony Xperia XZ1  Questions & Answers] 1230m:
I still like Sony TVs better too, but I guess I was trying to describe the USA market's (some customers') perception and/or what's popular.
[Sony Xperia XZ1  Questions & Answers] hnt20:
the certification is done by chip-set manufacture. in this case, Qualcomm which is the same chip-set on the oneplus5 and XZ1. so, i doubt it is a certification matter or that oneplus paid to certify.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Yeah. I don't get it either man. I don't mind Samsung TVs or despise them like I do their phones lol, but I still think Sony's TVs look MUCH classier. I have the 2008 40" Sony Bravia and to me it's still more gorgeous that most current TVs out now. It's like comparing Giselle to some lesser models. lol

I've seen the Samsung blu-ray players too and the Menu looks like it was designed by a third grader. lol Where my Sony blu-ray player looks elegant and nice.

---------- Post added at 03:44 AM ---------- Previous post was at 03:42 AM ----------

If that's true, then why is it the 5 has it but the XZ1 doesn't then?

I dunno. I was told it was required, so I don't get how OnePlus got around it if they didn't certify.
[Sony Xperia XZ1  Questions & Answers] Heinous:
As phone representatives often do not know what they talking about, I'm not going to rule it out yet. I'd like to see someone with the phone in hand actually confirm this feature or the lack thereof, you know, like the actual intended purpose of this whole thread.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Yeah, I agree. I just have a lot less confidence now than I did a day ago. lol Let's hope more people step forward like Brad did. Preferably

with

screenshots. lol
[Sony Xperia XZ1  Questions & Answers] VeixES:
edit:wrong thread