How To Guide Flashing a Xperia 1 iii without unlocking

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bentree

Senior Member
Apr 30, 2011
204
70
cooktown
Sony Xperia 1 III
Thanks for your reply.
What is your mean can't boot If I downgrade from Android 13 to Android 12? Are you sure?
You cannot flash older versions of Sony firmware once you have flasher a newer version. Sony devices feature rollback protection. The only way to flash older versions is to unlock the bootloader and then flash older version.
 
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Laclevuinhon

Member
Oct 12, 2017
32
3
Sony Xperia 1 V
Tôi đã flash thành công từ phần sụn gốc HK sang SEA. Tôi sống ở Việt Nam. Những gì tôi thấy :
Volte đang hoạt động, 5G hoạt động nhưng truy cập rất hạn chế (do VN 5G chỉ triển khai ở một số khu vực cụ thể).
Điện thoại không nhận được OTA vì nó được gắn với ID điện thoại. Nhưng có một cách dễ dàng để cập nhật flash.
Chỉ cần sao chép bản cập nhật vào thẻ SD (không đặt nó vào bất kỳ thư mục nào). Vào chế độ khôi phục và chọn cập nhật từ tệp và nó sẽ hoạt động.
Điện thoại khởi động nhanh hơn rất nhiều trên SEA rom so với HK rom. Sau đó, một lần nữa điều này có thể là do Android 13 vs 12.
Màn hình khởi động hiển thị biểu tượng Android ngay bây giờ (điều này không có trên ROM HK).
Giao diện người dùng từ trên xuống bây giờ là màu hoa oải hương.
Tôi không khuyên bạn nên sử dụng 5G với điện thoại này ngay cả khi bạn có quyền truy cập vào nó. Nó không có tản nhiệt cần thiết để sử dụng 5G. Điện thoại sẽ nhận được cảnh báo nhiệt độ cao.

Hướng dẫn cần làm rõ một vài : Bạn cần tắt nguồn và kết nối điện thoại với PC TRƯỚC TIÊN. Bạn cũng cần xóa 4 tệp SIN được tô sáng bằng lệnh khác TRƯỚC KHI bạn chạy công cụ flash. Nếu không, nó SẼ khởi động vòng lặp và bạn sẽ lãng phí thời gian (dữ liệu của bạn vẫn ổn).

Rant: Điện thoại Xperia thực sự cần phải có cơ chế tản nhiệt vật lý được tích hợp vào các mẫu mới hơn. (Bạn có thể ăn cắp làm mát bằng đồng hoặc buồng hơi của điện thoại khác và đặt nó vào CPU, nó có ích, nhưng nó SẼ khiến tay bạn cảm thấy tiếc). Điều này đòi hỏi một số kỹ năng và sẽ làm mất hiệu lực của mỏ đá. Tôi nghĩ rằng cái từ Note 10+ sẽ hoạt động.

CẢNH BÁO : NẾU BẠN CẬP NHẬT LÊN ANDROID 13, BẠN SẼ KHÔNG THỂ CUỘN LẠI BẤT KỲ ROM ANDROID 12 NÀO !!ã lắt

I have flashed successfully from HK native firmware to SEA. I live in Viet Nam. What i see :
Volte is working, 5G do work but very limited access ( due to VN 5G only roll out in specific areas).
The phone do not receive OTA since it is tied to phone ID. But there is an easy way to flash update.
Just copy the update onto an SD card (don't put it in any folder). Enter recovery mode and select update from file and it should work.
The phone boot A LOT faster on SEA rom than on HK rom. Then again this might be due to Android 13 vs 12.
The boot screen show an android icon now (this wasn't there on HK rom).
Top down UI is now lavender color.
I do not recommend using 5G with this phone even if you have access to it. It does not have the heat dissipation necessary to use 5G. The phone will get high temp warning.

The guide do need a few clarification : You need to power down and connect the phone to the PC FIRST. You also need to remove 4 SIN files highlighted by another command BEFORE you run flash tool. Otherwise it WILL loop boot and you will waste time ( your data is fine though).

Rant :Xperia phone really need to have physical heat dissipation mechanics built into the newer models. ( You can steal other phone copper cooling or vapor chamber and put that onto the CPU , it does help, but it WILL make your hand feel sorry). This require some skills and will void quarranty. I think the one from Note 10+ should work.

WARNING : IF YOU UPDATE TO ANDROID 13 YOU WILL NOT BE ABLE TO REROLL BACK TO ANY ANDROID 12 ROM !!
Sir, how do you download update to sd :((
 

zainfeb13

New member
Aug 11, 2023
4
1
Malaysia
I'm based in Malaysia and was able to flash from HK firmware to SEA firmware on my Xperia 1 iii HK set. Immediately got VoLTE on Digi network. Of course no 5G as the phone has not been approved by DNB.

However, I have a question as to how to now get VoWIFI (WiFi Calling) as I know that MY sets have this feature but HK sets being used here do not have this.

Is there any way to get WiFi Calling?
 

OnnuuR

Member
Aug 21, 2023
8
0
I'm a Xperia 1 mark 3 user(XQ-BC72), Android 12 was installed on my device(Customized RU 61.1.A.1.149)
I installed according to the installation instructions (Customized SEA 61.2.A.0.472) but the device started rebooting constantly and did not turn on in any way. Type-c to type-c cable I use. Thinking that the source of the problem is the cable, tried again with a usb to type cable and the result did not change. At the moment the charger is also finished. Please help.
 

OnnuuR

Member
Aug 21, 2023
8
0
Even though I followed the instructions completely, the phone was stuck in the flashing loop, I tried to roll back to the old rom and it still didn't work. I last formatted the data and the phone was hard bricked, now it is not responding at all. When I connect it to the computer, it doesn't even appear as a drive.
I regret not using Flashtool.
 

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  • 13

    Things needed:​

    1. An Xperia 1 iii (of corse)
    2. A Windows PC (I don't know if there's a Mac or Linux version, but I didn't find it)
    3. A reliable USB-C cable
    4. NewFlasher
    Download: [TOOL] Newflasher (xperia command line flasher)
    5. XperiFirm
    Download: Tool Archives - XperiFirm Tool

    !!!FIRST THING FIRST!!! BACKUP EVERYTHING IMPORTANT
    FLASHING A PHONE MAY CAUSE DATA LOSS. PLEASE MAKE SURE YOU HAVE A BACKUP OF YOUR DATA.


    1. Download and unzip the XperiFirm and select the ROM you want in the Available Firmware list and download.

    1630284680880.png
    1630284688276.png


    2. Once downloaded, unzip the NewFlasher into the ROM folder.

    Your folder should look like this:
    1630284714239.png


    3. Start a command line in the ROM folder and run "newflasher set_active:a" otherwise your phone will boot into a bootloop.

    1630284724477.png


    4. Power off your phone and plug it into your PC. Hold the volume down button and the power button until the LED turns GREEN.

    5. Now you can double click on the newflasher.exe in your ROM folder and follow the guide. You can keep user data while flashing, just pay attention on the instructions on the Newflasher.

    6. Don't disturb the flasher while it is working. Your phone will automatically turn on after the flashing is completed.



    My Xperia was purchased in China (XQ-BC72). I have tried many ROMs like Hong Kong and Taiwan versions. Recently I flashed my phone with the XQ-BC62 ROM and everything works very well (mobile data, voice calling, data roaming, dual SIM, exposure alert, etc.). However, I haven't try VoLTE because my carrier doesn't support it (SO SAD).
    I'm in Canada and my carrier is CMLink. The data icon for LTE shows 4G if you're curious.
    The DRM is not damaged that the Windvine security level is still L1 so you can still enjoy the HDR content on Netflix after flashing using this method.

    UPDATE Sept. 28, 2021

    I flashed my XQ-BC72 back. I have several issues while using the XQ-BC62 ROM.

    The US ROM doesn't include my carrier's configuration so VoLTE, VoWiFi, showing LTE instead of 4G is not working. According to other threads, T-Mobile doesn't have the configuration as well and someone mentioned only Google Fi users can get a configuration (NOT SURE).
    Actually, I didn't find any difference between the XQ-BC62 and the XQ-BC72 ROMs (I'm in Canada).


    Although the phone is working fine, the LTE is auto-disconnecting every 30 seconds, while HSPA+ doesn't have this issue. I don't think it's my carrier's problem because I bought a new Fido sim card and it's still disconnecting until I flash it back. So if your LTE works fine, please share your solution down below if you don't mind.
    I have heard that the new update 61.0.a.11.92 is enhancing the network performance. I don't know if it's because I didn't update my phone. I don't wanna "play" with my ROM since this is my daily using phone.
    Thanks to DennisDD78 who discovered that the OTA is not available if a non-native ROM is flashed, even it's all XQ-BC72. Still, if you make your OTA work, please share your solution!

    UPDATE Nov. 26, 2021

    I didn’t update the post due to the heavy university work (so sad).
    You can keep your data during flashing now by simply choose an option while flashing, as the Newflasher is up-to-date. But still please backup your important data before flashing.
    I can confirm that Gpay and android wear work perfectly after flashing, even a cross-model flashing.
    Flashing a different rom doesn’t bring any carrier feature like VoLTE and VoWiFi, see this post.
    I also tried XQ-BC62 roms again and also XQ-BC52 roms. Same issue, LTE disconnects every 10 seconds, and it brought no new features at all. I haven’t tried those Japanese roms. If you have any experience, please share.
    3
    Here are the instructions for keeping data intact while flashing firmware in Newflasher on the Xperia 1 III:

    If you only delete userdata.sin, your data partition will be corrupt and you will be forced to factory reset and lose all your data.

    To prevent this from happening, not only do you have to delete userdata.sin, but also appslog.sin, diag.sin and metadata.sin from the firmware folder as well. Found this by checking the update.xml file in the firmware folder, all required sin files to delete are listed as "<NOERASE>".

    @Forbesii feel free to edit your original post to include this important information.
    2
    Hi VO7T

    Thanks for the tip.
    Question, since the Android 13 is out now is there a way to update it without losing all the info in the phone.?

    Follow that video you will not lose any data.
    2
    Hi Anmolkakkar, i did all the above mentioned. Below is the screenshot.
    View attachment 5683201
    When I pressed any key to continue in newflasher.exe it automatically closes. I'm using the stock usb type C cable from Sony.

    Is there anything that i need to do at developer options or in the recovery mode?

    Thanks in advance for your guidance
    ***Latest Update***

    Successfully flashed it SEA firmware after 4 attempts. it works so far. Getting the VoLTE already since im in Malaysia. Special thanks anmolkakkar and Hotcakes_shinku. Missed installing the flash driver.. Hope this sort out my network drops.

    Thanks again. Appreciate very much
    1

    Things needed:​

    1. An Xperia 1 iii (of corse)
    2. A Windows PC (I don't know if there's a Mac or Linux version, but I didn't find it)
    3. A reliable USB-C cable
    4. NewFlasher
    Download: [TOOL] Newflasher (xperia command line flasher)
    5. XperiFirm
    Download: Tool Archives - XperiFirm Tool

    !!!FIRST THING FIRST!!! BACKUP EVERYTHING IMPORTANT
    FLASHING A PHONE WILL CAUSE DATA LOSS. PLEASE MAKE SURE YOU HAVE A BACKUP OF YOUR DATA.


    1. Download and unzip the XperiFirm and select the ROM you want in the Available Firmware list and download.

    View attachment 5396817View attachment 5396819

    2. Once downloaded, unzip the NewFlasher into the ROM folder.

    Your folder should look like this:
    View attachment 5396821

    3. Start a command line in the ROM folder and run "newflasher set_active:a" otherwise your phone will boot into a bootloop.

    View attachment 5396823

    4. Power off your phone and plug it into your PC. Hold the volume down button and the power button until the LED turns GREEN.

    5. Now you can double click on the newflasher.exe in your ROM folder and follow the guide.

    6. Don't disturb the flasher while it is working. Your phone will automatically turn on after the flashing is completed.



    My Xperia was purchased in China (XQ-BC72). I have tried many ROMs like Hong Kong and Taiwan versions. Recently I flashed my phone with the XQ-BC62 ROM and everything works very well (mobile data, voice calling, data roaming, dual SIM, exposure alert, etc.). However, I haven't try VoLTE because my carrier doesn't support it (SO SAD).
    I'm in Canada and my carrier is CMLink. The data icon for LTE shows 4G if you're curious.
    The DRM is not damaged that the Windvine security level is still L1 so you can still enjoy the HDR content on Netflix after flashing using this method.
    Could you please tell me the difference between the XQ-BC62 ROM and other ROMs for example the Taiwan versions. Thanks for your reply.