[Xperia Z5 Compact Q&A, Help & Troubleshooting] bokononisidore:
I don't use forums too much, so I have a feeling I'm going to be commenting here within the quote. Sorry about that. I hope this is helpful.

I ended up buying an XZ1 Compact and flashed the firmware for the international version with one portion using the US firmware. What I originally wanted to do couldn't be done with the old phone.

I made myself a file of notes back the first time I was taking care of all of this. These are not my words, but direct quotes from various forums, but I didn't keep all the sources so I'm afraid I'm unable to cite them properly. However, before embarking on this process, I should tell you that I haven't had any push updates since I did this over a year ago, and I haven't figured out how to repeat the process to update with new firmware. Good luck!

You can probably try googling some phrases from these in quotes to find the original sources:

I tried just those two files and didn't have any luck.

ETA - man, am I dumb! I accidentally was flashing the system_X-FLASH-ALL-C93B.sin and vendor_X-FLASH-ALL-C93B.sin files from the US firmware instead of the CE firmware! Once I used the correct files, it worked perfectly.

So to summarize (and definitely do at your own risk!)

0) I backed everything up.

1) I didn't load drivers because I had them.

2) I followed the directions at the link below to get xperifirm and newflasher, then used xperifirm to download the Xperia XZ1 poplar roms for G8432 Central Europe 1

3) I copied the two files listed above to my newflasher directory.

4) I shut down the phone, waited 5 seconds, then held down the volume down key and plugged it into my PC using a USB A to C cord.

5) I ran newflasher as administrator, and chose N when it asked if I wanted to load a driver

6) When newflasher told me I was done, I unplugged the phone and started it up.

The fingerprint scanner works, group texting works, and my system is showing the same signal strength!

See my screens in the prior 2 posts. It's really much easier than what you are describing. Download the Customized UK firmware from Xperifirm. Download the Customized US firmware from Xperifirm. Copy the system sin file and vendor sin file from UK firmware and replace the files in US firmware with the copied files. Flash the modified US firmware using newflasher tool. Bingo!

So I decided to take the plunge on this with the XZ1 Compact at least. Not only do I have the fingerprint sensor working, but also WiFi Calling and VoLTE on T-Mobile US.

I took the oem_X-FLASH-ALL-C93B.sin from the US Customized version, and overwrote the one included with the UK (Device is UK Model) version, and then proceeded to flash with Newflasher.

Everything seems to be working without issue. I couldn't possibly enjoy this phone more now.

I am being a bit lazy and will refer you to XZ1 Compact thread. pbarrette has done amazing job with figuring out all the bits and writing out how stuff works

Start reading from this post https://xdaforums.com/sho...9&postcount=35

Most informative post is here https://xdaforums.com/sho...&postcount=105

In summary, oem.sin from XZ1 Compact "Customized US" should be used to flash XZ1. All other *.sin etc files should be from XZ1 firmware (can use other region for fingerprint reader support).

Create folder caled 'partition', extract partition.zip into that folder and it will get flashed.

To put the phone in flash mode, you need to:

1] Power the phone off.

2] Press and hold the Volume Down Button.

3] While doing #2, plug the phone into your computer.

Device Manager should show an Unknown or Other device. Quite possibly the one above what you think is the right one.

It will have a device descriptor like this USB\VID_0FCE&PID_B00B in the "Details" tab.

Run newflasher and answer Y to the GordonGate driver.

It will exit after having dumped a zip file into the newflasher directory.

Unzip and install that driver for the device described above.

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I know userdata.sin and fota-reset.ta is responsible for wiping userdata so its safe to delete these two files in case you need to keep userdata, but cust-reset.ta and master-reset.ta somebody need to try and let us know if these two files is also responsible for wiping userdata. The rest of ta files is ALWAYS recommended for flashing, don't skip it! Simlock.ta is by default skipped so you no need to delete it.

http://www.xperiablog.net/2018/01/2...-firmware-for-xperia-xz-premium-xz1-and-more/

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

maybe best description