• Introducing XDA Computing: Discussion zones for Hardware, Software, and more!    Check it out!

Installing Windows 10 Mobile Tech Preview on Lumia 925 & Old Lumias after downgrading

Search This thread

digudc

Member
Jan 18, 2011
7
0
Tbilisi
just use FAST8960_CATWALK.hex from lumia firmware.... i used on few lumia 920 and few 925 and worked fine....

Could you please advise me, recently i have this build 10.0.14393.2068 in my L920 , now i receive update notification for 10.0.14393.2126. should i update this and up coming 10.0.14393.xxxxx builds ? Is it ok , definitely i won't be updating to Creators Update 10.0.15254.xxxxx, if it prompts me in future. Thank you...
 

dxdy

Senior Member
Apr 17, 2008
5,049
2,107
48
www.red-gsm.net
Nokia Lumia 920
Xiaomi Mi Mix 2S
Could you please advise me, recently i have this build 10.0.14393.2068 in my L920 , now i receive update notification for 10.0.14393.2126. should i update this and up coming 10.0.14393.xxxxx builds ? Is it ok , definitely i won't be updating to Creators Update 10.0.15254.xxxxx, if it prompts me in future. Thank you...

it's fine... AU (build 14393) still receive updates
 
  • Like
Reactions: digudc

Dandty

New member
Jun 25, 2018
2
0
Please Help

My 1020 bricked, I'd followed step one by one
then the winternals not responding in 0% bootloader
Now the phone in Black Screen cant connect to PC
 

NotAHacker12

New member
Jul 22, 2018
3
0
Hi need help here. while unlocking the bootloader i gave the paths to all the files required and clicked unlock, but then it starts processing and i get an error "parsing SBL1 failed". does any one know whats that about?
 

NotAHacker12

New member
Jul 22, 2018
3
0
Hi need help here. while unlocking the bootloader i gave the paths to all the files required and clicked unlock, but then it starts processing and i get an error "parsing SBL1 failed". does any one know whats that about?

Well i downloaded the correct .ffu file for my phone and it started the bootloader. however now the WPinternals app crashed with an unexpected error. now my phone doesnt even get detected by the PC or when i connect to a charger. it's completely dead. if anyone knows how to fix this please help me :(

this is what was in the WP Internal logs:

2018-07-22 11:12:06.552: Start flashing in Qualcomm Emergency Flash mode
2018-07-22 11:12:06.552: Flashing unlocked bootloader...
2018-07-22 11:12:06.629: Partition opened.
2018-07-22 11:12:06.629: Flash MBR at 0x00000000
2018-07-22 11:12:06.641: Flash GPT at 0x00000200
2018-07-22 11:12:06.723: Flash EXT at 0x02176E00
2018-07-22 11:12:06.723: Qualcomm serial response: 0000000000
2018-07-22 11:12:06.723: Expected: 08006E1702
2018-07-22 11:12:06.826: Error: Exception was thrown.
2018-07-22 11:12:37.845: Windows Phone Internals version 2.4.6609.40600
2018-07-22 11:12:37.861: Copyright Heathcliff74 / wpinternals.net
2018-07-22 11:12:38.126: Found device on interface: 71de994d-8b7c-43db-a27e-2ae7cd579a0c
2018-07-22 11:12:38.126: Device path: \\?\usb#vid_05c6&pid_9008#5&2418183c&0&1#{71de994d-8b7c-43db-a27e-2ae7cd579a0c}
2018-07-22 11:12:38.126: Connected device: Lumia
2018-07-22 11:12:38.126: Mode: Qualcomm Emergency Flash 9008
2018-07-22 11:12:58.561: Lumia disconnected
 

benjamen50

Senior Member
Dec 11, 2013
570
101
24
Melbourne
www.mtwo.com.au
Yeah I wouldn't flash or modify the bootloader on these phones. To unbrick from 9008 it requires a full image dump of a NAND (memory) chip from a identical phone and would need to be reprogrammed using a JTAG box so your pretty much SOL (There would be easier methods if there was better support for these phones but unfortunately there isn't).

This method is way more safer to do and does not make your device qualcomm 9008 bricked.

https://forums.windowscentral.com/w...test-10586-xxx-14393-xxx-15063-xxx-build.html

I'm running my Lumia 925 on OS 10.0.15254.490
 
Last edited:
  • Like
Reactions: NotAHacker12

NotAHacker12

New member
Jul 22, 2018
3
0
Yeah I wouldn't flash or modify the bootloader on these phones. To unbrick from 9008 it requires a full image dump of a NAND (memory) chip from a identical phone and would need to be reprogrammed using a JTAG box so your pretty much SOL (There would be easier methods if there was better support for these phones but unfortunately there isn't).

This method is way more safer to do and does not make your device qualcomm 9008 bricked.


I'm running my Lumia 925 on OS 10.0.15254.490

Thanks for the tip. i ordered another board for my phone so i will try this in a few days. reading the comments there it seems like it's a pretty risk-free method. a question though. it says to flash the phone with another ROM if it's a carrier-branded phone. the board i ordered will most probably be a carrier branded one. will flashing another ROM of the same RM-XXX code be too risky? i'm pretty unlucky regarding these things so i don't want take too much risk :p i'll live with the carrier boot screen if i am able to upgrade to W10 without flashing it. :p
 

ameanie

Member
Oct 16, 2015
15
0
Hi, I have a Lumia 1020 White ATT.
I followed the steps and got through to the end, installing Windows Insider, but when I tap "Get preview builds" it prompts me with :
"Server error:
A connection error prevented us from downloading programs for you. Please check the date/time of your device and its network connection and try again."

I used the Lumia 930:
PhoneHardwareVariant : RM-1045
PhoneManufacturer : NOKIA
PhoneManufacturerModelName : RM-1045_1011
PhoneMobileOperatorName : 000-FR
PhoneModelName : Lumia 930

For my registry edits.. I have wifi setup and it's connected, that's how I downloaded Windows Insider. My device's date is correct. I don't have a SIM card so maybe that's affecting things? It won't let me proceed past this point, though. I go int about in Windows Insider, and it says a Ring is not set but it doesnt let me change to one there. I checked for System Updates and it says my phone is up to date.


Any help here?
 

Top Liked Posts

  • There are no posts matching your filters.
  • 24
    Installing Windows 10 Mobile Tech Preview on Lumia 925 & Old Lumias after downgrading

    Howdy Guys,

    Windows 10 Anniversary update is out!! Well there is good news and bad news as well. Good News- Windows 10 Anniversary update is awesome and its stability is also good it is available for all mobile as well as for PCs. Bad news is that now old lumia(925,920,820,1020) will not even be able to install threshold build that means no Windows 10 update when you downgrade to WP8.1.
    All the registry hack tools for WP8.1 require Memory card so folks running WP8.1 with no memory card are helpless but, but there is a way you can install Windows 10 Mobile. This process is tedious and requires lot of patience. Don't give up!!

    Step 1- Install WDRT so that you can get all the necessary drivers. you can easily search for it on google.

    Step 2- Install Windows Phone Internals from here. thanks to @Heathcliff74.

    Step 3- Check the getting started page of WPInternal.

    Step 4- Now first we will unlock our bootloader and to do that we will be using WPInternal.

    Step 5- For Lumia 925 you have to select FFU file from C:\ProgramData\Microsoft\Packages\<Your Device Revision>\ Remember to select FFU file of the same version as of the version installed on your phone. If you have an FFU that is of older version than please flash it first with the FFU then proceed.

    Step 4- Then download the Emergency Flash Loaders by going to http://lumiafirmware.com. I have included for Lumia 925. It should be a .HEX file.

    Step 6- Then select the SBL3 engineering file and to enable ROOT access it is IMPORTANT to Select this file. I have included some files.

    Step 7- Now click continue and wait for the process to complete.

    Step 8- Now you can Enable root access.

    Step 9- Open RegEdit in your PC and click HKEY_LOCAL_MACHINE and then select files == > Load Hive.

    Step 10- Now in the dialog window navigate to MainOS ==> Windows/system32/config and select SYSTEM, it will ask for a name and name it such that you are not confused.

    Step 11- Now change the necessary keys. In this you have to navigate to Platform-->DeviceTargetingInfo and then need to change
    PhoneManufacturer = NOKIA,
    PhoneManufacturerModelName = RM-984_1006,
    PhoneModelName = Lumia 830,
    PhoneHardwareVariant. = RM-984
    For Lumia 925 I used the details of Lumia 830 Indian Variant. You can use the supported lumia which is close to your model in terms of spec.
    and after editing click unload Hive this will save your data and everything

    Step 12- Disable root access and press power+volumeDown key to soft reset and start your device.

    Step 13- Download Windows Insider and select preferred ring and you should see an update. Note after various updates release preview ring doesn't work for Lumia 830, so if you are using Lumia 830 or any unsupported devices then please use slow or fast insider ring

    Thank You.
    I would also like to thanks to @tofuschnitte.
    3
    It worked on Lumia 720. Thank you very much! :fingers-crossed:

    When i edited the registry i used this values:
    a)change " PhoneManufacturer " = MicrosoftMDG
    b)change " PhoneManufacturerModelName " = RM-1085_11302 (for Single SIM devices) // *** For all dual sim devices try = RM-1116_11258 ***

    4) change PhoneModelName = Lumia 950 XL (single sim) or Lumia 950 XL Dual SIM (for dual)

    5)change PhoneHardwareVariant = RM-1085

    I had found them on this thread http://forum.xda-developers.com/win...windows-mobile-10-redstone-rs1-build-t3319375

    Again, thank you! :good:
    2
    you still stuck in 2013 buddy?

    This is well know, is nothing new even if I'm an Android supporter we are talking about different architectures where by design Windows Mobile require less resources. Just to return in topic I'm running WM10 on 512 Mb RAM. To run smoothly Android, especially MM we need more then double RAM.

    PS: I just installed Redstone on L720. Finally to get the update to RS I used WPInternal as explained on OP but using these strings on registry:

    PhoneManufacturer " = MicrosoftMDG
    PhoneManufacturerModelName " = RM-1085_11302 (for Single SIM devices) // *** For all dual sim devices try = RM-1116_11258 ***
    PhoneModelName = Lumia 950 XL (single sim) or Lumia 950 XL Dual SIM (for dual)
    PhoneHardwareVariant = RM-1085

    Then after I upgraded to WM 10.1 TH2 I put these values to get Redstone but using CustomFPD

    PhoneHardwareVariant – RM-1027
    PhoneManufacturer – NOKIA
    PhoneManufacturerModelName – RM-1027_1007
    PhoneMobileOperatorName – 000-HK
    PhoneModelName – Lumia 636
    PhoneSOCVersion – 8926

    It's working fine except BT toggle remaining selected even if not enabled. Under monitoring.
    2
    First you have to open regedit on your PC and this time it will be showing your PC's registry after then you have to just click HKEY_LOCAL_MACHINE then click on file and load hive then open MainOS in the dialog windows and navigate to system32 >config>SYSTEM and click ok. then you will get your Phones's registries.

    I did several tests but it seems that I could get access basically as showed on this page:
    http://www.kapilarya.com/the-proces...e-because-it-is-being-used-by-another-process
    In our case we should look for SYSTEM instead of SAM and the root drive is mounted as "G" letter in my WIn10 partition, then I could edit the registry into the root drive.

    Now updating....
    2
    Hi Everyone, i tried to upgrade my Lumia 925 from 8.1 to 10.

    I followed the guide step by step. All went OK but in the last step when i install app "Windows insider" no build found! i cannot select any channel.

    Any advice?

    Did you check your phone model details in "Extras and Info"? Is it displaying "Lumia 925" or the one to which you've set, I assume you must have set it to "Lumia 830"?

    ---------- Post added at 06:51 AM ---------- Previous post was at 06:45 AM ----------

    Could I get some clarification on a few aspects of the process?
    1. After upgrading, will a hard reset (to restore backup) return the registry values to their original settings?
    2. If so, is the whole process of going back to 8.1 necessary for further updates? It seems that some folks mention changing the registry values again, but I don't see how if WPInternals doesn't support the latest build.
    3. If restoring backup data is desired, is it best to do that while on the latest supported build (so that the registry values can be changed) and then continue the updating process?

    Yes, hard reset will change it back to its original registry values. After hard reset you can change the registry values by installing "Interop Unlock Tool" in Windows 10 Mobile you can search for the tool in this forum or you can use any search engine to search for it, so no need for "WP Internals". If you still want to go back to Windows Phone 8.1 you can use "Windows Device Recovery Tool".