yashsingh1/xdaforums huggingface dataset:
[Sony Xperia XZ2 Compact Guides, News, & Discussion] hitemup92:
It's been a while but wanted to thank you for taking the time to write out these steps. I finally took a shot with the incoming shutdown of 3g for my XZ2, but unfortunately it did not work. Similar to what gigili said, while VoLTE appears to be provisioned the calls are dropping to 3g/HSPA like they originally were. After setting to "LTE Preferred" and rebooting, calls would not be made at all. I also saw "Unknown" under the Modem Config, and from what you said it should reference T-Mobile after flashing the OEM sin files.

I tried this using the latest firmware available on XperiFirm for the XZ2 (Customized US H8266 - my device is H8276) and the XZ3, which I used to grab the two OEM sin files. The firmware is 52.1.A.3.137.

Using UnSin, I unpacked both "oem_X-FLASH-CUST-B6B5.sin" files in both firmwares, and under modem-config there are a bunch of folders, and each one seems to have a conf files pointing to "mcfg_sw/generic/row/tmobile/vl/us/mcfg_sw.mbn."

I read in another thread that T-Mobile maybe has some way of blocking this workaround now, but I'm not entirely sure if that is true? Totally understand if you've moved on from the device as it's been a while, but am admittedly curious if there's a specific firmware version that this works on I could try to salvage the device.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] Samir solanki:
Volte xz2/xz2 p/xz3 solved
[Sony Xperia XZ2 Compact Guides, News, & Discussion] jaxwithanx:
Details on exactly how?
[Sony Xperia XZ2 Compact Guides, News, & Discussion] Samir solanki:
I will create complete guide thread for the same
[Sony Xperia XZ2 Compact Guides, News, & Discussion] jaxwithanx:
Thanks I'll watch for it
[Sony Xperia XZ2 Compact Guides, News, & Discussion] cbs228:
I am working to bring support for T-Mobile VoLTE on the xz2c to LineageOS 18.1. As of this writing, official LineageOS builds for this device do not support VoLTE unless it was already enabled and working in the stock firmware.

I have submitted some patches which may resolve the issue for TMO and probably other carriers as well. They work for me, but testing has been limited. If you are interested in using LineageOS instead of the stock ROM, and you are willing and able to build LOS yourself on linux, consider giving my patchset a try. Please read the patch description fully before attempting a build: you will need to obtain and mount some additional files first. The LineageOS wiki has additional instructions for creating a build environment.

EDIT: My patch is part of official LOS 18.1 starting with nightly 20220401. There is no need to build it yourself.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] xperiaperson42069:
You are a saint for working on this. I bought a H8324 XZ2c recently and was super disappointed it didn't work, so I am back to my XZ1c. Super frustrated. If you ever get a pre-compiled ROM, I would love to try. In the meantime I will try to compile it myself in the coming days despite my technical illiteracy.

If that doesn't end up working, what stock firmware is available with T-Mobile VoLTE enabled and working, so I could step up from that to Lineage? Considering how old the other solutions for trying to get VoLTE working, I am hesitant to try any especially funny business of switching old firmware files from other phones around.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] cbs228:
As far as I am aware there isn't any stock firmware that works "out of the box." The xz2c is listed as "unsupported" by t-mobile, which probably means there isn't any sort of stock ROM out there that works. Sometimes carriers do release "branded" ROMs, but there's nothing like that for this device AFAIK.

LinageOS is designed to be installed "on top" of an existing stock ROM. If you attempt to install it after you have flashed another distro (like an AOSP build), you will likely just make a brick. If you do end up bricking your device, do not despair. You can use Emma to restore your device to factory condition. Emma is available on the Sony Developer World website, and there are many guides available for it.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] cbs228:
Support for TMO VoLTE on xz2c is now available in official LOS 18.1. It is part of lineage-18.1-20220401-nightly-xz2c-signed.zip or later. No, this isn't some elaborate April Fool's Day joke—that's just when it was built.

Be advised that your carrier may still believe that your device is non-compliant or unapproved, and they may still kick it off the network one day. The cellular modem doesn't necessarily support all bands and modes which are in use today, and your coverage may vary. I am not in control of any of these things. While I have tested this OS and found it to my liking, there are some important features that I cannot yet vouch for:

Dialing emergency numbers. These have their own own IMS configuration that is distinct from non-emergency numbers. I'm not going to test this. Find a normal (i.e., 10-digit in North America) phone number for your local police department and add it to your Contacts. Use this number in case emergency dialing does not work. (This is good advice to follow regardless of whether or not you run a custom ROM.)

CMAS/Wireless Emergency Alert functionality. (I haven't received any yet.)

To continue, see the download page. Read the installation instructions carefully. Make sure to download the most recent release.

I have experienced issues getting the bootloader step (adb reboot bootloader) to work properly. Instead of this command, I have found that it is more reliable to:

Unplug USB and power off the device

Hold the VOLUME UP key. Do NOT press the power button.

Connect the device to a USB 2.0 port. The notification light will turn blue. If it does, you're in bootloader mode and can use fastboot.

The choice of USB ports is important. I've not had any luck flashing the bootloader over a USB-C or USB 3.0 port. Use a plain, full-size USB 2.0 port. Connect a USB hub if your computer doesn't have a USB 2 port built-in. USB 3 ports are sometimes a different color (blue or yellow). Avoid these. If the fastboot flash boot … command doesn't work, try another port. When you are finished with the flash, power off your device by unplugging it. Then continue to the recovery step.

The key combination VOLUME UP + POWER will force a reboot if you hold it down until the device vibrates once. To force a shutdown instead, continue holding these keys until the device vibrates three times in rapid succession. This works even if you've bricked it.

Make sure your SIM card is inserted at boot time. VoLTE should work out of the box, but you may need to enable it under Settings→Network & Internet→Mobile Network→VoLTE. Make a test call (perhaps to Voicemail). On the call control screen, if you see an "HD" indicator next to the call timer, VoLTE is working and you're good to go. See below:

VoWIFI does not work, and I have no intention of trying to make it work.

I can assist with basic installation questions or VoLTE support if it's not working. For everything else, please see the official support thread for this ROM here on xda-developers.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] xperiaperson69420:
Thank you so much, you and everyone else working on Lineage are true heroes!!! I saw the update and then the release notes and thought it was too good to be true. But it works perfectly now.

Also food for thought, before I bought the phone, T-Mobile's IMEI checker said it would work on their network... but no dice even on stock. And, when I got it, for two days I was walking around not even realizing I was not getting calls or texts, but LTE data was somehow working and the antenna logo showing a signal. Now with the update, everything works. You saved this phone from gathering dust in a drawer. Thank you so much again.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] House3272:
I have a H8314 and flashed to latest 18.1 nightly.

T-Mo does not connect. Works fine on my XZ1c so definitely the phone/modem's issue.

Anyway to debug this?

My IMEI checks out 100% fine on their website and even had a guy in one of their stores confirm.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] cbs228:
By "does not connect," do you mean that you have no IMS/VoLTE... or does it fail to connect to cellular at all in any mode?

Did you install the latest-available Android 10 firmware before flashing LOS 18.1? If not, you may need to use Sony's "emma" tool to return your device to the latest Android 10 stock firmware before installing LOS. I believe I'm on 52.1.A.3.49, but I'm not entirely certain of that. LOS must be flashed on top of stock firmware and not the Sony AOSP / SODP oem image from Sony Developer World.

If it seems very borked, it may be worth flashing back to stock and attempting a clean installation again.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] House3272:
No connection at all except for emergency calls.

T Mobile is detected as the network and the phone number is auto detected, but cannot even make 611 call.

And yea I have 2 of these, both were upgraded to android 10 and only 1 was unlocked and flashed to lineage 18.1.

Both same behavior.

Last night I unlocked and flashed the second Xz2c and same behavior unfortunately.

My xz1c works fine, even swapped sims and yea, TMo doesn't like my Xz2c's for some reason.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] cbs228:
This is consistent with my attempt to use an AOSP 11 build with the Sony oem.img. The cellular modem would not connect and would occasionally reset itself.

The official Sony ROMs have a variety of customizations. Even if you updated the OS internally before installing LOS, you still might not have the "right" version. I recommend downloading the official Emma flash tool. Power off the device and connect it to USB port while holding down VOLUME DOWN. (Try to use a USB 2.0 port and not USB 3 or USB-C).

I see that "H8314 52.1.A.0.618 Customized_UK" is available for this device. Try installing this firmware version. (Don't worry if you're not in the UK.) Make sure you pick the version that "Erases User data." Boot this firmware with a SIM and see if the modem connects. If it doesn't come up at first, wait a few minutes to see if the cellular network will provision it. Use the "T-Mobile US LTE" APN if available. You won't have VoLTE, but normal LTE data should work.

If cellular data works on stock, try installing LOS 18.1 on top of that. Be sure to erase your user data again when installing. Reboot your device with the SIM inserted at least once after you install.

This is what I did, and I very much hope that it will work for you as well.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] House3272:
Did you ever try putting the sim card into a different working device then letting it connect to the network and then putting it back in the Xz2?

I did that and it worked oddly enough.

Though I've had it where 2 minutes later, it disconnected again.

But for now, day 2 of it working fine even after several reboots.

I have absolutely no idea.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] jcummings2:
@House3272 is it your xz2 compact model H8314 that worked after you put the sim card in another phone? If so, does VoLTE now work as well?

Update: tried myself to no avail with LineageOS 19.1 by putting sim card in a known VoLTE supporting Samsung S10 and then putting it back in my xz2 compact H8314.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] jcummings2:
To answer my own question, I did get Voice over LTE (VoLTE) working on my H8314 on T-Mobile in the US with the 20220624 LineageOS 19.1 build for my XZ2 compact. See my other post.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] G84fastbootMaster:
I don't understand this. I found an IMEI for an XZ2 Compact online and entered it on https://www.t-mobile.com/resources/bring-your-own-phone and it said it is an XZ2 compact and is fully compatible with T-Mobile LTE (even "Extended Range LTE", which some, primarily cheaper, phones aren't). So why would it be necessary to do any mods to get VoLTE to work? On the other hand, Sony has a list of devices that it claims will continue working after the 3G shutdown in the US and there are no Z/XZ/XA devices on there at all.

I want to get a "new" Android phone (currently have an older iPhone as my main phone) and want it degoogled (so either debloat using adb, run Lineage or get one that does not come with Google stuff in the first place (2020+ Huawei)). I am torn between the P20 (imported from the UK as I am in the US), P40 lite (also imported) and an Xperia (I don't want an OLED display due to burn-in and flicker so XZ2+ expect for Compact have been eliminated and frankly I like a smaller size anyway). P20 is fully compatible according to the T-Mo checker (including "Extended Range"), same as the XZ2 Compact. P40 Lite (non-5G) is also compatible except for "Extended Range LTE" (5G version does support it). But if the XZ2c does not actually work without modding while it is supposed to work according to this checker, then what about the P20? Currently I am leaning towards the P20. P40 lite is less hassle because it does not need to be degoogled but its camera lacks OIS (unlike XZ2c and P20), which I value very highly.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] cbs228:
Interesting. When I first searched for my phone's IMEI, it was marked as "not compatible." Today I searched it again and it's now marked "compatible."

Either Sony has updated their official firmware—which I find unlikely—or TMO is using network data to derive their compatibility information. If a few of us here are all running LOS builds, TMO might think that the model works. To be fair, it does work… but maybe not with the stock ROM.

Barring official support from Sony, you will almost certainly need LineageOS if you want to run an xz2c.

I will caution that my LOS build (I'm a few versions behind) does not support RAW image output via Open Camera. I keep meaning to look into this… but I have an actual camera, and it blows anything any smartphone can do out of the water. I am also aware that running an unlocked bootloader disables some of the camera's signal processing algorithms. You'll want to search around to determine the extent of the problem.

I would be very much concerned about the potential for Huawei devices to offer the Chinese government an unlimited insight into your personal life. The same can be said of any device maintained by a Chinese company. Even custom ROMs like LOS retain a lot of vendor blobs, and these vendor blobs may contain unwanted antifeatures. This is my opinion, but I stand by it.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] G84fastbootMaster:
Yes, I have done some more research in the mean time and it seems that this IMEI checker is not all that reliable. This makes my quest that much harder. The problem is, a lot of devices that I am interested in are not sold in the US and the official solution to the whole VoLTE clusterf*** seems to be to "just buy a device from your carrier".

I actually just discovered the Galaxy XCover 5 yesterday and I am really interested in it since it is one of the few Samsung devices that still has an LCD display (I absolutely do not want an OLED with terrible PWM flickering and burn-in and I really despise this OLED fad that is sweeping the market) and it also a smaller size, which I appreciate, and 3.5 mm jack and removable battery, which I both prefer having. Unfortunately, it is not sold in the US, although you can buy one from Korea on eBay. However, I have been unable to confirm that it supports/is supported by T-Mobile US VoLTE and the XCover Pro, which is sold in the US, at least does not have working VoLTE on T-Mobile.

I understand your concerns regarding Chinese devices. However, China is not the only country that is interested in collecting as much personal data as possible through mass surveillance and I do not see why I should trust a company like Qualcomm anymore than Huawei. Furthermore, I have zero connection to China, no family there, no business, nothing and I am unlikely to ever visit the PRC in my lifetime, so while I would prefer to not be spied on by anyone, they are not my top concern. Furthermore, no evidence of spying either by Huawei phones or network equipment has ever been discovered after years of intense scrutiny by multiple countries/governments as well as individuals. That said my enthusiasm for the P40 lite 5G (or really Nova 7 SE) has waned quite a bit. I am also looking at some other (low-end) Samsungs with LCDs but it seems that some issues have been reported with them. In general, it appears to me that you are less likely to have problems with flagship devices such as the XZ series than low-end devices.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] cbs228:
I suspect the carriers prefer it that way. I do wish we could finally hang up on 2007.

For my part, I like small form-factor devices, even if they're a bit underpowered. 65 mm wide or less would be ideal, but those are rapidly going away. The folders are fragile, expensive, and super unwieldy when unfolded. Only Apple offers new(ish) products that I would still qualify as "small." No thanks. (About those Huawei phones again... :-D)

Maybe I'll just wait until they start selling smartwatches with cellular modems that have case sizes in the 100 mm diameter range. Then I'll finally have something I can put in my pocket.

Best of luck with your search.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] G84fastbootMaster:
I may just end up getting a new/open box XZ1 or XZ2 from Hong Kong on eBay. But I would prefer something with a 3.5 mm jack (FM radio would be nice too, just for emergencies) and Mediatek or Exynos SoC instead of Snapdragon (there was also the pretty serious Achiles Hexagon DSP vulnerability and I don't know if that has ever been patched for the XZ1/2). I read that XZ1 is supposed to work on T-Mobile but then I read about someone also California not having working VoLTE on T-Mobile on their device. Contacting T-Mobile to inquire about the XCover 5 seems to be a pain. You basically always have to identify yourself with your T-Mobile account/ID or whatever. What if I were a prospective (rather than existing) customer? Why do they care? Why can't they just answer a brief question from someone regarding *their* network.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] cbs228:
Oh yeah, me too. You can get adapters, but the dual power / 3.5 mm ones are expensive. Also, if you accidentally snap the connector because you rocked out too hard, well... no more phone charging for you.

IIRC, Mediatek can be a problem because they tend not to release their chipset source code to the public. This can make it difficult to build third-party ROMs for MTK devices. Or if there are third-party ROMs, they're stuck on a vendor binary blob kernel. The OEMs sometimes release the code themselves. If ROMs are important to you, be sure and check out the level of support available before you go with MTK.

I don't know anything about Exynos.
[Sony Xperia XZ2 Compact Guides, News, & Discussion] draconicsheep123:
Now that the shutdown is complete, does the previously mentioned trick of mix-matching files from different firmware versions no longer work?

I'm looking to see if I can continue to use my xz2c with T-mobile, but would prefer to keep my Android-experience as-is without going to LineageOS if possible. (If my software and apps are all different, well that's perhaps an even bigger disruption to my daily life than just buying a new phone, imo.)
[Sony Xperia XZ2 Compact Guides, News, & Discussion] cbs228:
I do not know. If your phone continues to work in VoLTE mode, there should be no issue. With that said, I cannot personally recommend this procedure as I have not tried it. In my opinion, arbitrarily replacing your modem firmware with another model's firmware is not sound engineering practice. There is simply no way to know what that does.

You can install something like Open GApps to have stock GApps on LOS if you want. Converting from stock to LOS does require that you wipe your phone and user data. You can use SeedVault to back up some of your personal data, but SeedVault won't back up everything. Pay attention to what SeedVault refuses to back up.
[Samsung Galaxy S10 Accessories] hollisnh:
I had many cases over the years, I like to have sometimes 10-15 cases for my main phone. So I would concern myself quite picky and having experience with variety of quality and prices of cases. The company did provide the case free in exchange for an honest review.

Galaxy S10 Heavy Duty Case - ArmadilloTek serves the purpose of a rugged phone case extremely well.

It goes on and stays on really tightly, it gives it a nice solid feel like it came that way from the factory.

- It offers dual protection with hard plastic on the outside and TPU/soft rubber on the inside.

-The case is well made, no sharp points from the manufacturing process that is found on many cheap cases. They used good quality materials and has a nice rugged design on the back that actually serves a purpose of helping you hold it even when wearing gloves.

-It does weight a bit, but that's expected when you want the additional protection.

-I was a little disappointed that a screen protector was not included, but there is a lip around the screen that provides protection when putting the phone down face first and from objects hitting the screen.

-The side keys are very responsive and stick out just enough not to be in the way.

-The kick stand is very useful and can be locked into place.

-While it was nice they have flip covers for the headphones jack and USB connector, they are pretty large and can get annoying flipping them up every time you want to use them. At the same time there are no covers for the Mics or speakers, so not sure if its really beneficial. The headphone jack and usb connector opening are very large, I didnt have any issues with the multiple chargers nor headphones used.

- It provide good protection for the rear cameras as well.

- The back on the case is on the slippery side, but the sides have a nice rubbery texture for a good grip.

Overall, if your looking for a rugged case for a S10 phone this one should be top of your list.

https://www.amazon.com/Galaxy-S10-Heavy-Duty-Case/dp/B07MLZY39Y
[Xiaomi Mi A1 Questions & Answers] usama20E:
Can i install twrp with stock rom!

How?!
[Tilt, TyTN II, MDA Vario III Windows Mobile ROM De] erik2912:
Does anyone have original T-Mobile NL ROM for kaiser?
[Tilt, TyTN II, MDA Vario III Windows Mobile ROM De] Gratje:
http://xdaforums.com/showpost.php?p=1586817&postcount=2

search next time
[Tilt, TyTN II, MDA Vario III Windows Mobile ROM De] Imperium:
I want the Dutch stock HTC rom (non branded) but can't seem to find it anywhere..
[Tilt, TyTN II, MDA Vario III Windows Mobile ROM De] Dust2Dust:
Not completely true....this ROM is

big

storage.
[LG G5 Questions & Answers] TybyShok:
Hello,

Model:LGH850

Suffix:AOPTOP

Buyer: OPT

Software Version:H85020F_00

OS Version:N

File Name:H85020f_00_OPT_AU_OP_0410.kdz

Can I update my LG H850 to Oreo? imei sais is made in Oceania

Thank you.
[LG G5 Questions & Answers] TybyShok:
up
[LG G5 Questions & Answers] dylank:
try updating your phone with lg bridge
[LG G5 Questions & Answers] TybyShok:
i did. and after he puts the latest nougat. 7.0 it says it is up to date.

https://lg-firmwares.com/lg-h850-firmwares/#tab=firmwares
[LG G5 Questions & Answers] dylank:
i think if you flash this kdz it should be fine

they dont say anything about country versions, i think its just the model number that's important (h850)

https://xdaforums.com/lg-g5/development/stock-h850-30a-eu-rom-flashable-zips-t3850072