yashsingh1/xdaforums huggingface dataset:
[Sony Xperia XZ1  Questions & Answers] tlxxxsracer:
G8342 with TMobile sim is not showing volte
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Sony's contract with ME for 2017..........................CANCELLED! lol

Maybe in 2018. MAYBE!

Thanks racer!
[Sony Xperia XZ1  Questions & Answers] hnt20:
Thank you for your feedback.
[Sony Xperia XZ1  Questions & Answers] jdavidev:
I have the International G8341 on Tmobile. Both Volte and Wifi Calling are searchable in the settings, but not active. Meaning, they ARE part of the build, but not working with Tmobile. Not sure if it's just that I have a UK rom or not. Inversly, Night Light and Tap to Wake are not even searchable, meaning Sony left those bits out of the ROM build.

Got the International because I thought I could have it both ways with FS and Volte. Would love to know if someone has the US variant to know if I should be scanning Flashtool to see if they can update to Oreo for hopes it works. The FS is amazing on this phone, but now that I have Band 12 in the area, it actually matters. (Didn't for the last few years on my Z5, which honestly wasn't that big of a deal, I guess).
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Yeah jda, I'm in the same boat, except I don't have the phone. lol I just got Band 12 in my area too finally (Chicago), so it does matter that I have BOTH the FS and VoLTE on T-Mobile. That's so weird that they show up but can't be activated. I didn't know that was possible, but then again, during this past week I've learned that A LOT can happen that I didn't know was possible. Like how 4-5 ONLINE PUBLICATIONS ALL got this T-Mobile VoLTE certification thing WRONG! lol

I'd like to know too if the U.S. variant can enable VoLTE or not. I don't remember now if anyone in here has done that yet or not. I don't think so?

---------- Post added at 04:08 AM ---------- Previous post was at 04:07 AM ----------

Racer, do you have the U.S. variant or int'l XZ1?
[Sony Xperia XZ1  Questions & Answers] genorok:
Just a thought, since we can see the T Mobile modem info in the builds but they seem to be disabled; do you think that VoLTE on other carriers could possibly be part of the rumored contact signed with Verizon? It would help explain why they would have that in the builds but disabled. I'm wondering if they are planning on enabling it after the rumored contact expires? It could also explain the "bad" information the news sources got (because the phone would actually have been certified). If they do hopefully one of those with the phone can keep us informed (because I too will not be buying another phone without VoLTE on T Mobile).
[Sony Xperia XZ1  Questions & Answers] tlxxxsracer:
I stated the model G8342. It's euro/int' dual SIM model
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
That's a VERY interesting theory genorok! Come 1/1/2018 the "rumored" contract b/t Sony Mobile and Verizon from 2015 (Z3v and Z4v, the latter of which never happened) is set to expire. I was actually thinking about this too, that they might enable it come 2018 for ALL the carriers including T-Mobile. I still think it's incredibly strange how so many news sources reported the same thing and it turned out to SUPPOSEDLY be false.

It just sux that we still have to wait another 3 mos from TODAY to even find out. If your theory DOES turn out to be true, it would be awesome but still stupid that Sony didn't just come out and say it from the start. But maybe they didn't wanna delay sales of the XZ1 and XZ1 Compact?? Who f'in' knows?! lol

---------- Post added at 06:40 PM ---------- Previous post was at 06:24 PM ----------

Ok. Thanks again! Much appreciated!

Again, if anyone HAS the U.S. variant of the XZ1 or else the int'l one but FLASHED the U.S. variant on it, please post here and let us know what you see in Settings regarding VoLTE & Wi-Fi Calling. The thing is, I'd be much more willing to buy it if I knew FOR SURE that come 2018 that VoLTE would suddenly be available for enabling. But try telling Sony Mobile that! lol
[Sony Xperia XZ1  Questions & Answers] VeixES:
It has been said couple of times before. Xz1 G8342 with Customised US firmware https://xpericheck.com/cda/1310-4358 does not get Volte/vowifi currently on T-mobile USA or any other US provider.

I will check next firmware update for sure to see if it changes...
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
I C. Ok. Hopefully the next firmware update unlocks it. :good::victory:

Sounds good. Thanks VeixES!
[Sony Xperia XZ1  Questions & Answers] daviddem:
I just ordered Xperia XZ1 from Amazon USA. It will be delivered today or tomorrow. Ill uodate as soon as I get it.

After reading 7pages, I still couldnt find a definitive answer!
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Hi David,

Ok thanks man!

Did you order the int'l version or the U.S. version? The U.S. Amazon site sells both, so that's why I'm asking.

Yeah this whole thing has been quite confusing, which could've been easily avoided if only Sony Mobile wasn't run by such idiots. lol
[Sony Xperia XZ1  Questions & Answers] daviddem:
I ordered US version.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Nice!

Well I know ppl on here have ordered the int'l version and then FLASHED the U.S. firmware on it and said VoLTE shows up in Settings but you can't turn it on. MAYBE the U.S. variant will be different? I honestly kind of doubt it, but who knows? lol And if it doesn't, if you end up keeping the phone anyway, maybe you'll get a nice surprise on New Year's Day?! LOL
[Sony Xperia XZ1  Questions & Answers] daviddem:
I just got Xperia XZ1 US version from Amazon. T-Mobile VOLTE and WiFi Calling are not working. The settings are visible when searching though.

Thank you Sony for ruining it again!
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Nice on it coming today instead of tomorrow. But UGHH on the second part. lol I hope you enjoy the phone regardless of that David.

The fact that they're visible DOES give us hope though, but geez what a mess regardless of what happens in January.

I might get the LG V30 instead. The more I read about it the more I love it. Want the unlocked one, but gotta make sure it's VoLTE-certified as well. I'm sure I'll find out soon enough. The U.S. unlocked G6 was someone on here said, so prob will be ok.
[Sony Xperia XZ1  Questions & Answers] daviddem:
For now I stick to my note despite that Im used to Sony and stock android.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
I see. So you ARE gonna keep the XZ1 then?
[Sony Xperia XZ1  Questions & Answers] daviddem:
No. Its not worth for $700 without those features
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Yeah. I hear ya man. I'd most likely return it too. F'in' Sony! lol

MAYBE in 2018 they will turn things around? I guess we'll just have to wait and see. But in the meantime I'm not buyin' their phones, even though the 4K HDR screen on that XZP is f'ing SICK! lol Saw it at Best Buy a few weeks ago. Jaw-dropping! lol And I only saw upscaled 4K, not actual 4K HDR content either.
[Sony Xperia XZ1  Questions & Answers] hnt20:
Thank you so much for your feedback. I believe we have came to the conclusion that XZ1 does not support VoLTE. Though, having the options on the menu could point to a possible support in the future, though, that is very doubtful based on the track record of Sony.
[Sony Xperia XZ1  Questions & Answers] tlxxxsracer:
Sucks, driving through an area I know I had LTE on other phones of mine... I'm only getting 3g or Hspa+ on the dual SIM international xz1.

As much as I like it, I may he selling it much sooner than I thought
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
I don't think anyone in here would be surprised if you did racer. lol It's bad enough that it doesn't have VoLTE in the U.S., but for it to not be catching 4G LTE signals too in that area is beyond unacceptable.
[Sony Xperia XZ1  Questions & Answers] genorok:
I have to admit, now I'm really confused. https://www.amazon.com/Sony-Xperia-XZ1-Compact-Unlocked/dp/B074P5FMGC shows the XZ1 compact with t mobile wifi calling and VoLTE. Nobody has confirmed it working yet obviously. So I wonder if the only reason the xz1 has this modem info is because Sony pushes out nearly identical firmware to phones of the same generation? Still makes no sense to me unless some behind the scenes contract is involved.
[Sony Xperia XZ1  Questions & Answers] tlxxxsracer:
I figured, I'll give sony a month or so to push an update to enable VoLTE. If it doesnt come, goodbye xz1.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Wow gen, that is NUTS! Though Amazon isn't exactly known for their "super accurate" product descriptions. lol Still, I guess there's always the chance that they will deploy an update to unlock VoLTE too.

I checked the U.S. XZ1 page on there as well, and no mention of VoLTE, unlike the U.S. XZ1 Compact page. David mentioned though that his U.S. XZ1 has VoLTE appearing in Settings without the ability to enable it as well, so I guess there's hope there too.

I agree with racer.......if they can't activate VoLTE within the next month, then screw 'em! lol

---------- Post added at 01:43 PM ---------- Previous post was at 01:31 PM ----------

Hopefully when jda or racer get their first or next update for their int'l XZ1 phones, it comes with a NICE surprise as well! lol
[Sony Xperia XZ1  Questions & Answers] tlxxxsracer:
My international version is running the HK firmware, still the latest none the less. May try flashing to a Euro version to see if theres a difference
[Sony Xperia XZ1  Questions & Answers] rp3:
I ended up getting an international XZ1 Compact (blue) and installing the US rom on it. The wifi/volte worked with t-mobile. Before I did, I had an idea that may be relevant to this conversation. This may apply only to rooted users, but it seems like there are specific files that control volte/wifi calling and a config file that enables them. Maybe they can be modified/added to a custom XZ rom. I had posted about this porting volte settings idea (which has been amazing for Samsung users:CSC selection for S7, S8, porting even across chipsets for rooted users). It may be, now that Sony has made one T-mobile VOLTE phone, they keys to making every sony a t-mobile volte support phone is out there.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Sounds like a plan!

---------- Post added at 04:15 PM ---------- Previous post was at 04:08 PM ----------

That is just weird! lol People on here like David who got the U.S. variant still weren't able to enable VoLTE on T-Mobile. Can you provide screenshots of VoLTE enabled in Settings and/or you on a call with phone still in 4G LTE?? I don't understand why this apparently works on your phone but no one else?!

Also, what is your model #?

Yeah it is possible I guess for that to happen since we have all these variants where VoLTE is listed in Settings but you can't enable it. I remember someone on here created a mod for the HTC One M8 Harman/Kardon version, which was only available from Sprint (2014). The only difference b/t that one and the regular One M8 I had was the software, not hardware. So the mod worked, though it took unlocking the bootloader, rooting, AND achieving S-Off to make it happen. I for one will never go through that again as at first it was cool but after a while I didn't like having to maintain it manually. So if it takes rooting to make it happen, I'm out. lol
[Sony Xperia XZ1  Questions & Answers] VeixES:
Simple, previous user is using XZ1 Compact with Customised US firmware.

But all the fuss is about XZ1 non-compact.

XZ1 dual has Customized US firmware which has volte settings available on fil3system but not loaded.

There is no Customized US firmware for XZ1 single sim.

There is no point of flashing xz1c oem.sin to xz1 as the modem configuration(volte etc) files are named differently.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Yeah but even the XZ1 Compact I thought wasn't getting VoLTE too, with exception to rp3.

Yeah I for one care only about the XZ1, but it's still encouraging to hear that the XZ1 Compact gets it, regardless of variant.

So the fact that the phone is single vs. dual-SIM actually matters? I didn't know that. Wow, this is getting confusing. lol
[Sony Xperia XZ1  Questions & Answers] genorok:
I suspected Dual vs Single SIM might matter since Sony has never sold dual SIM in the US in the past. So looks like we'll need a test on that as well but I don't see any single SIM XZ1 on Amazon at the moment. I'm hoping that Best Buy can show us the official US XZ1
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Yeah when I bought my int'l X Performance last year, it was a dual-SIM. I don't think Amazon had a single-SIM version for sale.

Yeah hopefully soon. Best Buy doesn't even list the XZ1 yet on its website. Only XZP.
[Sony Xperia XZ1  Questions & Answers] rp3:
I am using a XZ1 Compact G8441 with 47.1.A.2.281-R8B Customized US rom installed. I attached the call to 611 over LTE. I also have a wifi-calling settings in my phone app under settings > calls. I don't see any mention of LTE video calls.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Very cool rp3! So I guess it IS possible to make it work! I just wonder if this can be done on the int'l XZ1 as well? And even the U.S. XZ1 variant too?!!

So am I to understand then that the "Customized U.S. ROM" is different than the ROM that comes with the U.S. variant of the XZ1 Compact then?? That is one aspect I'm still kind of unclear on. And where do you get that ROM anyway?? (wild guess: XDA?! lol)
[Sony Xperia XZ1  Questions & Answers] rp3:
It should be the rom that US variants come with (or newer/older versions of the same region). I used xperiafirm (from XDA) to download the rom and NewFlasher (from XDA) to install the rom. I also had to download the usb driver from Sony. I borrowed quite liberally from these instructions meant for the XZ Premium

https://xdaforums.com/showpost.php?p=72958788&postcount=16
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Hmm ok. But this is still the XZ1 Compact. Too bad the XZ1 can't be enabled.

Do you have to root or unlock the bootloader, etc?
[Sony Xperia XZ1  Questions & Answers] genorok:
Hey rp3, does the fingerprint scanner work? Best buy has the compact phone and lists a working fingerprint scanner.
[Sony Xperia XZ1  Questions & Answers] rp3:
It does not (there is no option for fingerprint security under lock screen/security)
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
That is total BS. Then why are they advertising it as working then? lol
[Sony Xperia XZ1  Questions & Answers] aj.eats.sushi:
If you don't mind using newflasher to change your firmware, you can checkout this thread to unlock the fingerprint sensor and still keep the US firmware:

https://xdaforums.com/xperia-xz1/help/flashing-international-firmware-model-t3683552

Someone in reddit is trying the XZ1 compact. I had a larger list of files before and he mentioned he had stability issues. I didn't have any the entire day I had mine flashed. This evening, I narrowed down the *.sin files needed to two files and I asked the person in reddit to start over with the US firmware and then flash the smaller list of files. It's only been about 45 minutes for me since I tried the smaller set of files but so far so good.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Hey aj,

That's cool! Glad it's working for you then.

But are you getting VoLTE too or no?
[Sony Xperia XZ1  Questions & Answers] jdavidev:
I think I may have boned myself getting the single SIM variant (Int. for Tmobile). Doesn't appear they'll be selling the single sim in the US. Hope eventually I can get Volte activated, either officially or unofficially.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Yeah hopefully, and sooner than later!
[Sony Xperia XZ1  Questions & Answers] inteltecra1700:
I can confirm that there are issues. So, getting this right out of the way, sometimes I pick up Band 12 but if I receive a call it switches. Band 12 only works with Data.

The real issue is voice calling - I've done a few test and you will find that frequently calls go straight to voicemail regardless of the bandwidth you are on My guess is that Volte for phones with Volte is prioritized for voice. without Volte running, it's a hit or miss. So what do we do? Of course, let's continue to test our variant Roms (FYI Taiwan Rom on my XZs worked with Volte) BUT let us also contact both Sony & T-mobile. Maybe we can organize a Tweet storm or email contact to see if they can assist with Certifications. Let's do the same with T-Mobile.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
You ROCK intel! lol :good:

That is f'ing WEIRD. Either it should work or it shouldn't. This halfway BS needs to be addressed and resolved.

I don't have Twitter, but I'm in for an e-mail thing.
[Sony Xperia XZ1  Questions & Answers] inteltecra1700:
One final Thought: If you switch your Mobile Network/ Preferred Network Type to "LTE/WCDMA" it will solve your missed call issue. I tested it this morning and so far all calls came in. You still won't be able to use too data while on a call -- you'll get Edge speeds at most.

When I get home I'll look up the Sony Xperia USA contact info and share it here. If anyone want to assist, let's get together and do it.
[Sony Xperia XZ1  Questions & Answers] aj.eats.sushi:
I'm not really sure. I'm on ATT and last I looked they didn't offer it for non AT&T branded phones.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
See I don't get that. lol A year ago someone on here I knew had the Xperia X Performance but on AT&T, and he said he was getting VoLTE for sure (I wasn't cuz the Xperia X Performance was not certified for VoLTE with T-Mobile). AT&T DOESN'T require certification for VoLTE like T-Mo does, so unless something's changed, the phone, if it IS VoLTE-capable (which it should be since it works in other countries), SHOULD automatically offer full VoLTE on AT&T.

Can you send screenshots of your Settings page for Calls or similar where VoLTE would be located? I'd like to know if it shows up AND if you are able to enable it or not? The consensus so far on here is everyone (XZ1 or XZ1 Compact people, both U.S. and int'l versions) SEES it in Settings, but you simply can't enable it. SO confusing. If you can that would be great, but if not, it's cool too.
[Sony Xperia XZ1  Questions & Answers] andTab:
Given that everyone else has reported this not working it is probably safe to say that this call was made on Band 4 or 2.

As such VoLTE is probably still confirmed as NOT working.
[Sony Xperia XZ1  Questions & Answers] VeixES:
Guys if you want to know which band you are on then install Cellmaper app.

https://play.google.com/store/apps/details?id=cellmapper.net.cellmapper

It can show the band you are currently on. Record the band and signal strength to local csv file or you upload recorded data to server and view from webmap the towers and bands recorded.

https://www.cellmapper.net/map

PS. Vowifi should be disconnected during that band recording.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Nice, thanks! I use LTE Discovery myself, but it's good to have alternatives. I have an "alarm" set on there too where anytime it detects Band 12 it makes a little beep sound similar to like when I receive a new text msg. In my elevator for example (I live on the 4th floor of a 4-story condo building), in recent months I've noticed it beep while I'm riding IN the elevator, and in the past I would maybe get like one bar in there. But now reception is great in there. So clearly in my area Band 12 is finally present. (I have the HTC 10 btw)
[Sony Xperia XZ1  Questions & Answers] rp3:
Here is me on the phone with customer service (611) while band 12 is showing in LTE discovery app
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
hey rp3,

Ok and you said you got the int'l XZ1 Compact with a customized U.S. ROM on it? And T-Mobile too right?

What's the difference (if any) b/t the "customized U.S. ROM" and the just the regular U.S. ROM? Or are they the same thing?

I'm glad you got VoLTE..........that is clearly apparent in your screenshot. To me, the proof is not really that LTE Discovery is detecting Band 12, but that you're STILL in 4G LTE DURING the call.

Thanks for sharing this!

Now only if we could make this happen in the damn XZ1! lol
[Sony Xperia XZ1  Questions & Answers] WaxysDargle:
i can confirm on the XZ1C that voLTE is working. checked and band 12 is connected. voWIFI working, too. obviously had to flash US firmware to get this going.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
That's awesome Wax! Glad to hear it.

So just to confirm, is the US firmware EQUAL to the US version of the XZ1 Compact?
[Sony Xperia XZ1  Questions & Answers] VeixES:
There is only 1 "US" firmware available for XZ1 Compact and should be installed on the XZ1 Compact bought in USA https://xpericheck.com/cda/1310-4371

If not that firmware on device, then there is no other "US" firmware. Probably some other region firmware then. Device is identical in every country, only firmware differs.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Ok so yes then.

Thanks VeixES!!
[Sony Xperia XZ1  Questions & Answers] Heinous:
That is somewhat good news, even if it is only the compact. Any luck activating the fingerprint sensor and keeping both features?
[Sony Xperia XZ1  Questions & Answers] WaxysDargle:
There is a set of instructions for accomplishing that, and users are reporting on the XZ1C thread that it does work.

I have not tried it, because it is a mix of US and EU firmware, and i'm pretty sure it will break OTA updates.
[Sony Xperia XZ1  Questions & Answers] Heinous:
Fair enough. That has been my experience on the XZ Premium, as well.
[Sony Xperia XZ1  Questions & Answers] 1230m:
Would this mean that you would have to plug in and update manually (re-mis-match firmwares and flash it) for each update? Or is there more to it?
[Sony Xperia XZ1  Questions & Answers] Heinous:
Yes, exactly. I mixed CE files into US firmware and received neither OTA. I had to flash each update and eventually just stuck to the French firmware because the only benefit of the US firmware was cosmetic (more signal bars, but not actually a better signal) and I never found the right combination of files to omit to prevent having to hard reset each time.

In the case of the XZ1C, VOLTE would be well worth figuring out which files.
[Sony Xperia XZ1  Questions & Answers] 1230m:
Okay, thanks for the help and information!

Was this hard to keep up with or annoying? I'm in the us and looking at T-Mobile, so maybe more worth it for me?
[Sony Xperia XZ1  Questions & Answers] Heinous:
No problem. I don't want to hijack this thread any further, but It was a nuisance for me because there was no real benefit. If you want to use VOLTE, Wi-Fi Calling, and the fingerprint reader all on T-Mobile US, it would probably be worth it. I would probably do it, but I'm not going to switch from the XZP to the XZ1C.
[Sony Xperia XZ1  Questions & Answers] RockStar2005:
Yeah I just wish there was some easy trick to make the XZ1 have VoLTE on T-Mo, but so far it doesn't sound like one exists. Or I'd really just rather Sony took their head out of the A$$ and certified it already with T-Mo. I swear, they make some of the best products ever, but they have the biggest sackless f'ing idiots running things there. They should be KINGS here in the U.S., instead they're a footnote when it comes to smartphones. F OVERRATED Samsung. lol
[Sony Xperia XZ1  Questions & Answers] andTab:
Can you confirm that band 12 works on calls, ie that VoLTE works and that the phone is not sometimes (temporarily) connecting to band 12?

There were reports of the X Compact having band 12 and VoLTE and that all turned out as BS.
[Sony Xperia XZ1  Questions & Answers] WaxysDargle:
i definitely have HD calling , which i believe is synonymous with voLTE. i have not confirmed band 12, but i did just start logging, so i should have an answer shortly on that. i live in a fairly large city, so lots of band 2 and 4 around.