yashsingh1/xdaforums huggingface dataset:
[Sony Xperia XZ2 Compact Questions & Answers] flyer_andy:
I had an XZ2 Compact Dual SIM and it worked for Verizon VoLTE but only after flashing the USA version's OEM files as had been mentioned eariler in this thread (the dual SIM version is non-USA). The problem with VoLTE on the XZ2 and any other Sony phone that isn't officially approved for Verizon is that Sony seems to block the modem config that enables the IMS connection which is necessary to get VoLTE working. They actually do it to T-Mobile folk as well (unless this has been resolved by now?) So the culprit here is almost surely Sony. The hardware works fine and Verizon doesn't block non-approved phones in any way as you've pointed out (I get Verizon VoLTE great on my Xiaomi Mi Mix 2 and 2S, actually...but of which are totally unapproved on Verizon but have band 13, 5, 4, and 2 LTE).

But until someone discovers a way to manually set the modem config to allow for IMS on the XZ2 we're going to have problems getting VoLTE to work...I'm sure there's probably a way but it'll most likely take an unlocked bootloader and some work in the modem-related files.

As a side-note, on Xiaomi phones a dialer code of *#*#86583#*#* will unblock IMS/VoLTE (this code disables VoLTE carrier checking) so perhaps if there's some similar code for Sony phones that might help...I think this is only a Xiaomi thing though so I doubt it'd work for the Xperia...Sony seems to have locked out the IMS pretty well from non-approved carriers. Really lame.
[Sony Xperia XZ2 Compact Questions & Answers] ehBrY:
Thanks for the thorough explanation. Now what is the easiest way to flash those us files on the dual sim? I need to get mine ready. Does it factory reset the phone in anyway? Where can I find instructions to flash. Is there any way to do the flashing without a computer?

So flashing will only give us volte on verizon? Also need volte on tmobile working. Are any devs modding the modem files so that we can bypass any block or having no approval from tmobile/sony to certify volte for compact?
[Sony Xperia XZ2 Compact Questions & Answers] flyer_andy:
No you don't have to factory reset the phone I recall. I don't have my XZ2 Compact anymore as the speakers started crackling...but yeah it's pretty easy.

I think I downloaded the USA firmware using XperiFirm and then used NewFlasher to *only* flash the OEM.sin and OEM_Extra.sin files...this didn't affect the phone in any way I could tell except that it enabled Verizon VoLTE. It did not enable T-Mobile VoLTE however...but this was a month or two ago so maybe Sony has gotten T-Mo VoLTE working? Not sure. Good luck!
[Sony Xperia XZ2 Compact Questions & Answers] ehBrY:
Issue resolved.
[Sony Xperia XZ2 Compact Questions & Answers] Salbawardi2:
I have H8314 and VoLTE is still not working on T-Mobile :(
[Sony Xperia XZ2 Compact Questions & Answers] AgentOrange96:
I have to say, even though I seem to be one of the first people to get this phone working fully on Verizon, sometimes I have issues where I'll get an error about receiving a text message. No matter how many times I retry, I am unable to receive it. And when I haven't been texting someone, it's hard to know who sent me a message, and thus I can't really contact them to figure out what I missed. Usually messages go through fine, but this is definitely an irritating bug. It's really one of few issues I have with this phone. (The other being the camera crash I started a thread about.) I am using Textra.
[Sony Xperia XZ2 Compact Questions & Answers] boulderjoe:
HD Voice on Verizon Prepaid with XZ2c

I just activated an H8314 on prepaid and was told HD Voice wasn't supported for this phone... anyone else get this? Is this a prepaid thing (although supposedly prepaids get HD voice)? Or did they remove it from the list due to some of the problems people had? What gives?
[Sony Xperia XZ2 Compact Questions & Answers] AgentOrange96:
I actually just deactivated it AND reactivated it today trying to troubleshoot MMS. (Seems like you need to use the actual Verizon Messages app sadly.) So it seems like it's still an option. Maybe check back after in case it takes a bit to update your options. If that doesn't work, I'd call Verizon and ask about it.
[Sony Xperia XZ2 Compact Questions & Answers] boulderjoe:
Thanks. Did you just enable/disable through myverizon?

For your MMS issues do you have the newest SIM? I burned 3 hours of my life yesterday because I picked up a brand new sim from an authorized reseller that was apparently fairly old. It let data and text through, but gave server error on voice calls.
[Sony Xperia XZ2 Compact Questions & Answers] AgentOrange96:
I had to do it through the site. The app doesn't have the option to disable or enable that.

I think my SIM is fairly new. I got it off Amazon though, so who knows. I'm able to get calls/data/texts. Just for some reason Textra anyway doesn't play nicely with MMS. Verizon's texting app works fine with it though. And actually isn't as bad an app as I expected.
[Sony Xperia XZ2 Compact Questions & Answers] wforsphone:
I plan to switch from AT&T to Verizon. Before doing so, I am wondering whether Wifi-Calling is enabled for XZ2C with Verizon? ( I know some earlier discussion here indicates NOT, then how is the situation now?)
[Sony Xperia XZ2 Compact Questions & Answers] hgoldner:
So I tried this out yesterday. Disconnected the Compact from the data network, but while connected to wifi attempted to make a call, after confirming with Verizon that wifi calling was enabled on my account. The call went through. So, while the call won't indicate across the bottom that it's a wifi call (like my HTC handsets used to), the H8314, the Sony Xperia XZ2 Compact does provide for wifi calling on the Verizon network.
[Sony Xperia XZ2 Compact Questions & Answers] Mike7143:
Thinking about buying a couple of these to replace our aging 2013 Motorola Moto X phones with Verizon... but a little hesitant. Can anyone provide answers or verify the below:

1. H8314 (single SIM) works with no issues on Verizon?

2. I may have to mess with HD voice to get it working?

3. What's the deal with texting and MMS messages, does it work or not? Reliably?

4. Stuck with the Moto X (developer) because it could be unlocked and rooted... what's the deal with the XZ2c? Can I root it? What about unlocking the bootloader as well? And do I have it right that you might be able to unlock and keep the stock camera working? If you unlock and lose the DRM whatever, is the camera still usable (with a 3rd party app) or does the camera completely quit working.

Frustrated as heck because I want a better spec'd phone that's not a flipping tablet on my face and nobody seems to make one. This comes along, hear it works on Verizon, and been waiting for prices to drop and now that I start digging in it seems like this thing's kind of a turd?
[Sony Xperia XZ2 Compact Questions & Answers] hgoldner:
Search is your friend. All of these questions are answered in other threads.

As to Q1-3, everything works fine on Verizon on the H8314: HD calling, wifi calling, MMS and SMS.

I have no desire to root, and my XZ2C is an excellent successor to the HTC 10.
[Sony Xperia XZ2 Compact Questions & Answers] UncleDick:
New Verizon Issue?

People on the Sony Forum are complaining that their XZ2 Compacts on Verizon are suddenly failing to communicate until they do a factory reset. (Cannot place or receive call.) Has anyone on this forum experienced something similar?
[Sony Xperia XZ2 Compact Questions & Answers] Suhm Gai:
reply

Having same exact problem. More precisely my device isn't recognizing the SIM card at all, so it obviously can not communicate with Verizon's servers...

ht tps://tal k.sonymobile.com /t5/Xperia-XZ2- Compact/Son y-Xperia-xz2-sudde nly-can-t-connect -to-Verizon-netw ork/td-p/13621 62

sorry about the random spaces in the link.
[Sony Xperia XZ2 Compact Questions & Answers] hgoldner:
Just ran into this this past weekend (Saturday afternoon). Went to a Verizon store and got a new SIM, since the SIM had been used in a half dozen test handsets over 24 months, but that didn't make a difference.

I had a long telephone conversation with a Sony support representative who ultimately recommended: (1) factory reset and, if that doesn't work; (2) "software repair" on PC with Xperia Companion. If that didn't work, they would open repair order. After 8+ years of working with dozens of Android handsets from dev to finished products, I could see no reason a factory reset would cure, but in fact it did.

On Tuesday, however, the signal dropped twice within the space of ninety minutes. Toggling airplane mode returned service. If it behaves itself, I'll hope that an upcoming software update fixes whatever is going on. Otherwise, secured a backup phone, and will run software repair before opening that repair order.

One other noteworthy deficiency. Wifi calling WORKED on Verizon before last software update. Doesn't now. :(
[Sony Xperia XZ2 Compact Questions & Answers] woodardhsd:
Same thing here. Left an area with good signal this morning and phone worked. Came back, now cannot connect.
[Sony Xperia XZ2 Compact Questions & Answers] UncleDick:
Sony or Verizon?

So, "something has changed", but what? Reports of this phenomenon go back a week (Sat, Feb 2) I could see monthly software rollout taking a week, so that some customers would update many days before others. (It's a big world and Sony is providing updates to potentially millions of phones.) I could also see Verizon rolling out a software change across the country. It is always possible that a software update might create a mess that only a "reset" can cure. But, if that is so, how can it happen

again

? I hope people continue to report so it will become clear that (a) a reset fixes things permanently, or (b) the problem still exists.
[Sony Xperia XZ2 Compact Questions & Answers] bitshftr:
Same thing here. I drove to an area with no cell service at all a few days ago. When I returned to civilization today, I have no service (can't make calls, receive calls, or send/receive texts). Verizon support was no help, suggesting a new SIM card.

hgoldner, how exactly did you get WiFi calling working on Verizon previously?
[Sony Xperia XZ2 Compact Questions & Answers] UncleDick:
How to Enable Verizon

The early pages of this forum topic have numerous posts about the trials people went through a year ago to get their Sony XZ2 Compact to work on Verizon. (a) it has to be the "single SIM" model, not the "two SIM" model. (b) the account has to be set up for Voice over LTE (VoLTE), which sometimes involves a call to Verizon and possibly a new SIM card.

This phone is the first of a "new generation". Since mobile phones were created, there have been two competing methods of making the radios work: CDMA and GSM. In the entire world, only Verizon and Sprint based their networks on CDMA. Verizon wants to "turn off CDMA" and re-purpose the radio bandwidth. There are even rumors that Verizon is now refusing to provision a phone that works ONLY on CDMA. They want to move everybody to LTE.

Sony's Xperia XZ2 Compact is the first phone to be certified on Verizon which has ONLY LTE. (No CDMA modem at all.)

(More than you wanted to read. Sorry. Probably most efficient to skim through the early posts and see what worked for people.)
[Sony Xperia XZ2 Compact Questions & Answers] bitshftr:
My XZ2C is single-SIM, and VoLTE is on. What I was asking hgoldner to reply with is any specific steps that were taken to enable WiFi Calling on this phone on Verizon. I don't have this option in my Settings or phone app settings.

This thread is 14 pages long, and hgoldner specifically said he had it working on a previous version of the Sony firmware, so I was wanting him to respond with whatever trick he learned that actually worked. I'm hoping to follow those steps on the next Sony update to see if I can get it working.
[Sony Xperia XZ2 Compact Questions & Answers] UncleDick:
Geez, I'm sorry. Just as an "aside", I have read posts claiming that WiFi calling is NOT enabled on "Open Market" phones. Here's a sample (it mentions a different brand, but the sentiment is the same) https://community.verizonwireless.com/message/1596579#1596579

Someplace on the Verizon forum I found a list of all the Open Market phones that were acceptable under the "Bring Your Own Phone" program. The Sony Xperia XZ2 Compact was the ONLY Sony on the list. That post had the same list of "things that don't work."

It would be great to have WiFi calling on the Sony.
[Sony Xperia XZ2 Compact Questions & Answers] woodardhsd:
I was able to get service back after doing a software repair using the Xperia Companion software. 18 hours after, I still have service. A few people on the xperia forums said they had problems again after doing a factory reset, but so far so good.
[Sony Xperia XZ2 Compact Questions & Answers] hgoldner:
Unfortunately, I can no longer verify that wifi calling works on the H8314 since the latest software update.

In fact, as reported elsewhere, I completely lost signal 2 weeks ago and had to do a hard reset to get it back.

Hoping it's a software glitch to be corrected in the next update.
[Sony Xperia XZ2 Compact Questions & Answers] gickles:
Verified on Verizon.

I want to say that I am using this phone (h8314) on verizon in the USA

4G+ LTE, too.

They had an issue getting it running at first and it was the visual voicemail. They had to turn it off, IIRC.

took. About an hour with the rep over the phone.

Switched my sim from my Z force to the xperia xz2C

I was told that dual sim models will NOT work. Not sure why
[Sony Xperia XZ2 Compact Questions & Answers] hgoldner:
There's a new software update today (52.0.A.7.1) for the H8314 which hopefully fixes the disconnection bug.
[Sony Xperia XZ2 Compact Questions & Answers] gickles:
I just made a post about this a few hours ago!

No idea what it was for though
[Sony Xperia XZ2 Compact Questions & Answers] hgoldner:
At the very least, it includes the February 1, 2019 security patches.
[Sony Xperia XZ2 Compact Questions & Answers] arteitle:
I received an update today as well, but to version 52.0.A.7.1. Is that a typo, or could they be sending out different updates on the same day?
[Sony Xperia XZ2 Compact Questions & Answers] hgoldner:
It's a typo. I went back and fixed it.
[Sony Xperia XZ2 Compact Questions & Answers] TroySmith80:
I'm thinking about purchasing an XZ2 Compact to use with verizon prepaid. It looks like it may be possible but complicated. Would you all recommend that i choose a different phone or different carrier? I just want a compact phone with a very good camera (not iphone) and that has good connection (or as good as one can hope for anyway) when out in the mountains and what not.

Am i understanding correctly that this phone may work with the newer network technologies like LTE but won't work on older CDMA stuff? Would that mean that it would be less likely to have service in remote areas, where a phone that worked on CDMA would still function?
[Sony Xperia XZ2 Compact Questions & Answers] hgoldner:
That is correct. Only the 8314 is certified on Verizon and is LTE only.
[Sony Xperia XZ2 Compact Questions & Answers] braveally:
This thread is great. I ended up not getting the phone because I could not justify it with a perfectly working pixel. Now it's time for me to get something new. Would you still buy this phone today as a "last year flagship" upgrade. The price has dropped substantially and its getting harder to find them new.
[Sony Xperia XZ2 Compact Questions & Answers] UncleDick:
Use in Remote Areas

First, I just LOVE this phone, and I am on Verizon (regular, not prepaid). Your concern is valid. The XZ2 Compact works

only on LTE

. And, there was an issue with the phone needing a factory reset if it spent too much time in a "dead zone". (Recent firmware update may have fixed it. Has not happened to me, but then I am in a large, urban area.) And you are also correct that provisioning the phone on Verizon is not as simple as GSM. The nice folks at Best Buy spent nearly 30 minutes on the phone with Verizon getting mine to work as I stood there smiling, "I'm not buying it until it makes a phone call."

Eventually, Verizon will phase out CDMA and their LTE coverage should be as good as CDMA, but no one knows when that might be.

If you can switch to AT&T prepaid (GSM) this phone would be great. If you absolutely must stay on Verizon, I share your concerns.
[Sony Xperia XZ2 Compact Questions & Answers] hgoldner:
Verizon plans on shutting off CDMA early 2020. While my 8314 still sporadically drops signal, toggling airplane or reboot always fixes it since last update.

I should add, as a former handset tester, that this issue is not unique to Sony. Many LTE-only handsets encounter this on Big Red.

Nonetheless, it's still my daily driver, and I don't feel like I am missing anything, even though it's last year's model.
[Sony Xperia XZ2 Compact Questions & Answers] TroySmith80:
Thanks for the feedback!
[Sony Xperia XZ2 Compact Questions & Answers] tasaroth:
Read through several times, still frustrated.

As per the title, I have read through this (and similar) thread several times with no luck. I purchased an unlocked XZ2c H8314 single sim US warrantied phone from fleabay that will not activate on verizon's network. Verizon says my IMEI is not compatible, even though when I search for mobile networks Verizon shows up, but when I try to connect it is rejected by the network. Level 2 tech support management claims Sony needs to unlock the phone before it will activate, and Sony says it already is unlocked. With both companies pointing the finger at each-other, and me slowly realizing I wasted $400 even after months of research, I come to you guys hat in hand..

Two questions, if anyone is still monitoring this thread....

1) Is there some way to tell if an XZ2c is a US H8314 vs a global H8314 (if that is really the case)? How would one tell if it is a "Best Buy" handset or not?

2) Has anyone in a similar situation figured out a way to talk Verizon into manually entering the IMEI into their system? I'm having a hard time wrapping my head around how Sony would develop two versions of a handset and label them both H8314

Thanks in advance!
[Sony Xperia XZ2 Compact Questions & Answers] UncleDick:
I finally bought my XZ2C at Best Buy, even after reading discussions like this about Verizon. Best Buy did not have the color I wanted, but they said, "We have a silver one that is "open box" because it was returned because the user could not get it to work on Verizon." $150 off, wow! "Sure, I'll take it

once I see it work on Verizon

." Tech guy at Best Buy was on the phone with Verizon for nearly 30 minutes until, yay, made phone call and got SMS text.

There is a "No CDMA" setting that must be activated by Verizon before the phone will work.

Verizon has a "Bring Your Own Phone" program and the XZ2C is one of the acceptable phones. I would go into a Verizon store (not a "Verizon partner") and say, "Sign me up. Here's my phone. When you make it work, I'll pay." Before you go, check the IMEI on Verizon's web site: https://www.verizonwireless.com/od/prepaid/bring-your-own-device/#/checkDevice
[Sony Xperia XZ2 Compact Questions & Answers] tasaroth:
Thanks for the lead on the "No CDMA", I will mention that once I get back up the support tree to level 2. Right now the issue Verizon is unable (or unwilling) to address is the "The phone associated with the Device ID you entered is not compatible with the Verizon Wireless network." return from the IMEI check, even though it is a H8314 single sim US handset.
[Sony Xperia XZ2 Compact Questions & Answers] tasaroth:
Since this thread is by far the best repository for information related to Verizon and the XZ2c I would like to add I answered my first question.

H8314 SI 1313-1117 appears to be the "Global" version of the handset. The IMEI of SI 1315-1117 is not approved for Verizon. (edit 1315 to 1313)

H8314 SI 1313-7910 is the "Best Buy" version of the handset, and from what I can gather is approved on Verizon's IMEI check webpage.

Shame on Sony for using the same model number for both handsets, I have never encountered this before and am more than a little miffed at the fact it is likely to be an expensive lesson to learn.
[Sony Xperia XZ2 Compact Questions & Answers] UncleDick:
Thanks for letting people know. I found something "similar" on the web, showing that the H8314 was deployed to "North America and Europe". https://www.techwalls.com/sony-xperia-xz2-compact-model-number-differences/ Looks like whoever sold it to you was not aware that H8314's intended for Europe are not compatible with Verizon.

I have read comments by people who put Verizon firmware on their H8314 and got them to work. Not something I would be eager to do. Hope you get your money back.
[Sony Xperia XZ2 Compact Questions & Answers] vtrally:
Hey all, I just wanted to say thanks to everyone who has contributed to this thread.

I picked up a US version XZ2 Compact and like many here I was unable to receive text messages. A few hours of messing around and I finally found this thread.

Deleting then re-adding HD Voice from the Verizon website fixed my issue. Would never had figured that out without the help of the forum.
[Sony Xperia XZ2 Compact Questions & Answers] firefurby:
I've tried removing the HD Voice from my account, but no luck. I can't get anything to work. I also tried putting it in a Pixel 2 and then switching it over, but the APN is different and still no signal at all. Anybody have any ideas what else I could try?
[Sony Xperia XZ2 Compact Questions & Answers] tjdean01:
I've had the single SIM version of the Sony XZ2 Compact H8314 for several months and have been unsuccessful in getting it to connect, even after trying all the tricks listed in this thread.

Finally, I did as tasaroth suggested above and went to Verizon's IMEI check website for prepaid phones and learned "The phone associated with the Device ID you entered is not compatible with the Verizon Wireless network." (IMEI was not previously available until I let the phone do dozens of updates to the Sony/Android software but now I can view it). If there is indeed a "global" version (H8314 SI 1313-1117) and "best buy" version (H8314 SI 1313-7910) then it could be possible I have the global one that is "incompatible." However, the phone gives me no further info as to its full model number.

Is there a way to check which exact version I have? Do I switch to AT&T or T-Mobile to get this to work? Will it even work on those networks? There are literally no alternatives for small Android phones made within the past three years. I have the serial number BH901314BZ but that's no help.
[Sony Xperia XZ2 Compact Questions & Answers] nneige:
Coincidently I just ran across your post after tearing out my hair over the same issue. Just spent 3 hours at a Verizon store while they tried in vain to get my H8314 activated. I now suspect I have the global version but, like you, can't figure out how to confirm this. I share your dismay about Android phones getting larger and larger - that's why I bought the xz2c. Too bad cause it is really a nice phone.

I would caution you about AT&T. I originally had the phone activated on their network. The problem is that it will not make VoLTE calls. Anytime you make a voice call it will shift to a 3G band (HSPA or UMTS). Calls on these bands have been highly unreliable - sometimes dialing with no ringback signal but connecting and sometimes not dialing at all. Furthermore, AT&T like other carriers in the US will soon be dropping their 3G non-LTE bands making it completely impossible to make voice calls unless they decide to provision the xz2c for VoLTE - something they are unlikely to do. The only solution may be to flash a compatible kernel or continue to shop around.