yashsingh1/xdaforums huggingface dataset:
[Windows Phone 8 General] juicer52:
I skipped step 9 completely. Worked fine.

I run with scissors.
[Windows Phone 8 General] ilovelumia_phone:
Thanks juicer52.
[Windows Phone 8 General] SonicPower:
So without an unlock code, I can use this phone on any carrier as long as the frequency bands are supported after completing the process?
[Windows Phone 8 General] juicer52:
I still can't get Band 12 to work. Went to area of good Band 12 coverage and as soon as I disabled all but Band 12, I lost signal completely. Lumia 640 ATT from BestBuy unlocked.

I installed cabs and then flashed and followed with the commands as follows. Flashing always was a success but please check the commands I used to see if I am overlooking something.

thor2 -mode uefiflash -ffufile "C:\Users\Jim\Downloads\RM1073_02177.00000.15203.26115_RETAIL_prod_signed_1001_023F70_TMO-US.ffu"

thor2 -mode uefiflash -ffufile "C:\Users\Jim\Downloads\RM1073_02177.00000.15203.26115_RETAIL_prod_signed_1001_023F70_TMO-US.ffu" -productcodeupdate 059X0P7 -skip_flash

thor2 -mode uefiflash -ffufile "C:\Users\Jim\Downloads\RM1073_02177.00000.15203.26115_RETAIL_prod_signed_1001_023F70_TMO-US.ffu" -do_full_nvi_update -do_factory_reset
[Windows Phone 8 General] SonicPower:
Why is there a space in between 2 and 6 before RETAIL?
[Windows Phone 8 General] juicer52:
That space between 2 and before 6 is an artifact from xda site. I checked my notepad file and the space isn't there. If I try to edit my original post, the space isn't there either in the text as submitted.

THANKS for looking carefully nonetheless.

Any second guesses?

Still don't want to let go of this... I HATE failure!
[Windows Phone 8 General] Dibbyd:
I don't know why it's not working, but I think I did the nvi and factory reset in two commands with the skip_flash, such as:

thor2 -mode uefiflash -ffufile "C:\Lumia\RM1073_02177.00000.15203.26115_RETAIL_prod_signed_1001_023F70_TMO-US.ffu" -skip_flash -do_full_nvi_update

thor2 -mode uefiflash -ffufile "C:\Lumia\RM1073_02177.00000.15203.26115_RETAIL_prod_signed_1001_023F70_TMO-US.ffu" -skip_flash -do_factory_reset

Another option is to try the MetroPCS ROM, which is actually the ROM I used. 059X0Q4. Band 12 and wifi calling work great for me.
[Windows Phone 8 General] jamssx:
Can you capture the complete log from the command window?
[Windows Phone 8 General] juicer52:
Not sure how/where the log is stored or how to post. Please advise.

Which command window?
[Windows Phone 8 General] jamssx:
You're running the command from a elevated command prompt. It logs it all to that. The nvi/factory commands should only return a small bit of text if you use the skip_flash (the full flash quite a bit more but since you're seeing B12 as an option that bit has worked even if its not active) so you should be able to copy and paste what's in the command prompt window....
[Windows Phone 8 General] jamssx:
That all looks good... So I'm at a loss... Just in case something had gone wrong the first time you tried it, just double check it's still not working.....
[Windows Phone 8 General] juicer52:
Ok will do. 15 minute drive to band 12 area. If still not active I may try metro pcs Rom...
[Windows Phone 8 General] juicer52:
Nope. Still not working.

I guess I will try Metro PCS ROM?

UPDATE: Just installed Metro PCS following above steps and will have to take a drive again to check if Band 12 works.

Am I testing this correctly in disabling ALL but Band 12 to determine if it is functioning?

If Metro PCS ROM fails at Band 12 function, it may just be that I am repeating a mistake...
[Windows Phone 8 General] reachforthesky:
I skipped step 9 completely too. And my AT&T unlock request was rejected and I'd to re-submit it. I guess I run with scissors too.
[Windows Phone 8 General] juicer52:
If you are sure you selected the "non ATT customer" option when making the request, just resubmit and/or call customer service. I did both.
[Windows Phone 8 General] moonpie28:
As far as band 12, I work in a dense building and I've always had to use Wi-Fi across multiple phones. I now get a signal... Even LTE. So that was my proof. Didn't disable any bands.
[Windows Phone 8 General] boonesmi:
yeah that was the method i used to test band 12. i disabled all other bands in fieldtest and verified it was getting signal.

you can also use the earfcn to verify what band you are connected to.
[Windows Phone 8 General] juicer52:
Where do I access earfn on the 640?
[Windows Phone 8 General] boonesmi:
in fieldtest select LTE

---------- Post added at 10:19 PM ---------- Previous post was at 10:15 PM ----------

you can enter the earfcn here and it will show you what band your using

http://niviuk.free.fr/lte_band.php
[Windows Phone 8 General] juicer52:
well earfcn is 5035 which converts to:

Eureka!

With TMobile sim card I get the 5035 for earfcn

Requested Earfcn : 5035

Band	Name	Area	Mode	EarfcnDL	Downlink (MHz)	Earfcn UL	Uplink (MHz)

12	700 a	NAR	FDD	5035	731.5	23035	701.5

Apparently Band 12 IS working but when I turn off all but Band 12 I lose signal at icon BUT probe LTE shows earfcn as 5035

Sys Mode 4-LTE??
[Windows Phone 8 General] boonesmi:
yeah im not sure what "sys mode" is all about. i noticed it when setting up my wifes 640 original t-mobile 640 about a year ago, and it confused the heck out of me. a google search showed that when connected to any lte band it would show sys mode 4.
[Windows Phone 8 General] sharpehenry:
thanks OP,

took me about 20 minutes to figure it out and now converted to t-mobile software. this will be my backup phone as I already have a daily driver.

WiFi calling and band 12 are fully operational on my debranded AT&T to T-mobile.

Thanks again.
[Windows Phone 8 General] evilvoice:
For those on Windows 10 with no data, you need to set up internet and mms apn. I used the information from T-Mobile support page for adding apn to iPhone 5. I now have lte when I couldn't get any data previously
[Windows Phone 8 General] speaker1264:
Huh? This thread is for the Lumia 640, not the iphone 5. The Lumia 640 automatically knows what mobile service provider you are on based on your simcard and configures those settings accordingly, or at those settings are baked into the firmware, cause I didn't have to do anything special on any of my phones. There is no need to change the apn settings...
[Windows Phone 8 General] evilvoice:
Wow, it takes a genius to not figure out what I was saying. Maybe when you go to T-Mobile support page and search for apn settings for Windows phones, they don't tell you any information. Maybe when you search Google and go to a website that has the supposed correct apn information for T-Mobile, it is wrong. Maybe there have been reports on this thread that attest to the fact that data does not work for every phone on Windows 10 mobile. Maybe I had the same issue and it wasn't until I entered the apn information that I could get full data on my Windows 10 mobile device. Maybe I was trying to help people that have the same issue and was giving them what worked for me and an easy way to find the information, but by all means, ridicule me for trying to help.
[Windows Phone 8 General] UCFour:
Can anyone point me to the download link for Kaptaiin LumiaFlashTools?

I couldnt find it any where. I had downloaded it previously but lost that folder somewhere?

And also can anyone guide me to restore completely back to At&t

I tried to flash At&t ffu via recovery tool and it gave me platform mismatch error
[Windows Phone 8 General] forgreatsouce:
Worked perfectly

I used Product Code 059X0B8 for the AT&T flash

and 059X153 to debrand it.

Downloaded the FFU files from

http://cellomania.com/ffu/
[Windows Phone 8 General] anubis23:
Hi, at the moment no I don't believe their is a method to unlocking the Lumia 830, I am not sure what the DevicePlatformID shows and seeing how I do not have a Lumia 830 I cant check to see if it uses the pconf file located on the normal partition or if it uses the uefi way and stores it on a PLAT partition. Also I am unable to sign a cab for it because I don't again have access a lumia 830 for live trails.
[Windows Phone 8 General] anubis23:
I currently do not have a Lumia 1520 at hand to pull the cabs or to sign a cab from a modified one.
[Windows Phone 8 General] anubis23:
You would want to change the product of the phone after flashing the 3 cabs if you wanted to keep your phone unbranded from att or if you wanted to reflash using the WDRT tool encase of emergency you would have to change the product code because windows device recovery downloads a rom using that product code.

An to clear up for last partition of the post, you flash the three cabs, flash the unbranded rom, then whenever you choose (preferably after debranding) change the product code. When you are unbranding the phone you do not use the WDRT software.
[Windows Phone 8 General] anubis23:
No problem, glad to see it worked for you and thank you for the donations. :D
[Windows Phone 8 General] anubis23:
Yeah, I read somewhere that the nokia servers to download roms was under maintence for some time now. I am unsure if they will be up again to the public or not. What you could do to download a rom is, before doing anything to your phone. you could just change the product code of the phone, then plug it into your pc and use the WDRT to download the rom, the rom will then be stored in, C:\ProgramData\Microsoft\Packages\Products\RM-XXXX\, and XXX being the version of the phone that you have. BUT once it finish downloading, PLEASE MAKE SURE YOU DO THE DEBRANDING STEPS in the first post. DO NOT TRY TO FLASH a rom from a different product code, because their is a slight change you could brick it, or it would just fail, but we do not want to do anything that would brick it in such a way.
[Windows Phone 8 General] anubis23:
Greatly appreciate your help smokin901 , in helping others :). Thank you for pitching in, I appreciate. Sorry about not replying sooner guys, I've been busy with school starting up, everything should be all leveled out now where I can reply quicker.
[Windows Phone 8 General] xjox:
Hi, even doing this the RM-1073 version don't have the Band 3 LTE (1800) right?
[Windows Phone 8 General] sachin.gokhale:
I thought above quote from Kaptaiin might be helpful for everyone.

Thank you Kaptaiin.
[Windows Phone 8 General] micallan_17:
If you like, I can try to get the information you need. Just let me know what to do :
[Windows Phone 8 General] evilvoice:
Sorry for this newbie question but, if I flash the t-mobile rom, can I still use my AT&T sim? Besides opening band 12, what does debranding allow me to do? I understand removing the AT&T stuff, but if I flash t-mobile, won't that put their stuff on it?
[Windows Phone 8 General] qodexc:
Flash 059X227 RM-1073 VAR LTA AR CV, it's unbranded and has all the ATT bands plus band 12.

https://www.microsoft.com/es-ar/movil/celular/lumia640-lte/caracteristicas/

https://www.microsoft.com/en-us/mobile/phone/lumia640/specifications/

https://www.microsoft.com/es-ar/movil/soporte/producto/lumia640-lte/softwareupdate/

---------- Post added at 04:17 AM ---------- Previous post was at 04:07 AM ----------

Yes, you can use your AT&T sim on a T-Mobile rom. Debranding removes AT&T contacts, apps, and start up logo. You can remove AT&T contacts and apps easily without debranding. If you flash T-Mobile it will have their apps and start up logo.
[Windows Phone 8 General] klienm:
Anyone know if I can get lte band 1 to work on the at&t lumia 640 and which ROM I need to flash?
[Windows Phone 8 General] jusnoob:
stuck at No. 5, help??

...really a noob at this, anubis23 do I copy your line example No.5 into the command prompt, manually? Or how do I discover the line path like yours shows?

I can't seem to find a t-mob version of this phone brand new so bought att gp, If a brick I'm out $48. But I've read of success with this. Doesn't seem hard and I have downloaded all necessary files you advise (WDRT- iutool) successfully. I'm just not at all familiar with any of this culture and language here. Thank you in advance
[Windows Phone 8 General] qodexc:
yes copy that line

cd "C:\Program Files (x86)\Windows Phone Kits\8.1\Tools\bin\i386"
[Windows Phone 8 General] jusnoob:
...ty waiting for unlock code and gonna give this a whirl fingers crossed
[Windows Phone 8 General] adelmundo:
Just did the switch from AT&T (GoPhone) to T-Mobile successfully. Had a problem with doing it on my Win 7 laptop, kept getting error 0x80070490 when using IUTOOLS.EXE. Switched to a Win 10 desktop and was able to use IUTOOLS.EXE to push the 3 cab files. Then another issue with the Nokia Data Package Manager where it could never go into Online mode, so I used Navifirm+ instead, but it couldn't log into using the public username/password and donated $3.30 to create an account so I could download the latest T-Mo ROM. Was able to flash that and then change the product ID and now running a T-Mo "branded" 640 (with the Death Star logo on the back LOL).

Confirm that it now has T-Mo Wifi calling but yet to test if I can get Band 12 because no Band 12 in my area (I live in the Bay Area and Channel 51 is used by a local TV station but Band 12 should come soon.
[Windows Phone 8 General] charlotted:
I do confirm the process works fine with a Windows 7 Pro x64 laptop. You do not need anything but the "core tools" for IUTOOL. I have wifi calling, and I can't test for band 12 because it isn't available here.

This puzzles me. For unbranding, 2 versions are recommended: 059X153 (RM-1073 VAR LTA 7R CV) and 059X227 (RM-1073 VAR LTA AR CV SKD), but I see above a suggestion to use the latter (Argentina country specific) instead of the former (Latin America)

Why? I thought country specific version were more likely to have limitations, such as forbidden LTE bands. Is the Argentinian version adding bands instead??

You can't. FDD-LTE band 1 is only available on RM-1072 (and 1074 and 1075 and 1113), not on the RM-1073.
[Windows Phone 8 General] qodexc:
059X153 (RM-1073 VAR LTA 7R CV) is RM1073 02177.00000.15184.36003 RETAIL prod signed 1011 027112 000-22 MV.ffu

so basically RM-1073_1011 and part of Mexico

It showed different bands and less than AR on the Microsoft site.

https://www.microsoft.com/es-mx/movil/celular/lumia640-lte/caracteristicas/

https://www.microsoft.com/es-mx/movil/soporte/producto/lumia640-lte/softwareupdate/
[Windows Phone 8 General] Petulinek:
Succesfully debranded ATT L640 and flashed RM-1072 CZ firmware without problems, many thanks from my wife :)
[Windows Phone 8 General] Petulinek:
You can download it from Mega: https://mega.nz/#!III23BoB!Ba07go_D8Nw8dEZxd9xl0nUNzR55iAyTQUAGw6WMwQk

I think its not possible to flash original At&t ROM yet.
[Windows Phone 8 General] juicer52:
Am I correct in thinking that this procedure is specific to Windows 8 and will be obsolete once Win 10 mobile is rolled out?
[Windows Phone 8 General] sharpehenry:
This is first time I am owning windows phone so not really sure how major update rolls out for the device, wouldn't this be the process you want to take (besides AT&T since it's already AT&T) so that you can take proper windows 10 OTA update for appropriate carrier?

I could be wrong, do windows phones major update need a PC to perform or will OTA do it?

Or you could take this same steps to install windows 10 when official version for this device arrives.
[Windows Phone 8 General] cncb:
Unlocking denied

Has AT&T changed their policy for unlocking these? I bought 2 from Walmart a few weeks ago. I submitted an unlock request on their website for one and I got the unlock code with no problems. Just this week I submitted the request for the second one and it was denied saying I need AT&T service for 6 months. I called AT&T up and they would not budge saying the same thing. Both of these were unopened so I didn't accidentally activate it. Did they change their policy?
[Windows Phone 8 General] sharpeyedman:
either buy code on ebay or return them before return expires
[Windows Phone 8 General] cncb:
Is this a known issue with some of them for no apparent reason?
[Windows Phone 8 General] boonesmi:
many people have had the first attempt rejected, not sure why.

anyway just re-submit
[Windows Phone 8 General] ilovelumia_phone:
Does anyone know what the following command does when you run it?

thor2 -mode vpl -vplfile "location of .vpl file"

This step is described in the following link:

http://xdaforums.com/showthread.php?t=2515453

Thanks
[Windows Phone 8 General] sharpehenry:
i'm guessing they forgot to click on the link ATT sent within 24 hours to proceed the process. most haven't specified why they got denied, I'm just guessing.
[Windows Phone 8 General] jasonv31:
please dont flame ... (Ive been struggling with this for hours.. sigh lol). I cant even get past step one... :-/

im getting this error ...

Microsoft Windows [Version 10.0.10240]

(c) 2015 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32>cd C:\Program Files (x86)\Windows Phone Kits\8.1\Tools\bin\i386

C:\Program Files (x86)\Windows Phone Kits\8.1\Tools\bin\i386>iutool.exe -p C:\Lumia -V

(IUTool Version: 11:52:10/Feb 7 2014)

Log file: C:\Users\Jason\AppData\Local\Temp\IUTool-{299338D7-E9AD-4D02-BD74-B341894FDEEF}.etl

ERROR: 0x80040154

Command failed. (HRESULT = 0x80040154)

C:\Program Files (x86)\Windows Phone Kits\8.1\Tools\bin\i386>

When I look up the error it is a "class not registered" error ... ive tried reinstalling the tools, etc... same error :-/ Anyone got any ideas ?
[Windows Phone 8 General] boonesmi:
did you download the 3 cab files? where are they located? did you create a directory in c drive named "Lumia" and make sure that the 3 cab files are in that directory AND that nothing else is in that directory?
[Windows Phone 8 General] jamssx:
Looks like the driver is not installed. (Probably rebooting PC will help.) The first time the phone is attached an additional set of drivers are installed for IPOverUSB which seem to behave very slightly differently to the ones in the WPDK- the package is in the IHV_Tools of the WPBlue so rerun that package. I think that's the missing one... Note you might now find that they don't start automatically for software deployment.
[Windows Phone 8 General] jasonv31:
yes, c:\lumia, yes (I think its pretty obvious that is the case ... the tool ran and gave the error. hence its pointed in the correct location) ;)
[Windows Phone 8 General] boonesmi:
lol, i didn't mean offense. i remember seeing several people getting an error when they had more then just the 3 cab files in that directory.

also the tool will run if in the i386 directory with iutool.exe.... meaning the tool will still run (and it will error) if you don't have the cab files.

the only other suggestion i have is that some people had errors on one system and tried again on a different pc and it worked.
[Windows Phone 8 General] jasonv31:
No offense at all ... Im just glad someone is trying to help me :) Windows phone is new territory for me... im used to android for the most part.

---------- Post added at 10:34 PM ---------- Previous post was at 10:29 PM ----------

Thanks for the tip ... I tried installing that one and the other driver in the folder (the latter one looked like it had not been installed... cant remember the name) rebooted and same error. Tried moving the phone to different USB ports (that is the cause of wierdness sometime seems like since 8.1, I am on win10)

Next I will try my wifes laptop that is also on win10... I have a feeling this is something with my computer... and I dont feel like figuring it out atm... not for a $30 phone im sending to my daughter that she will most likely drop and crack the screen within a month. LOL

If anyone has any other ideas let me know... ill keep trying :) And thanks again for the replies !!! It means alot to have some help ! :)
[Windows Phone 8 General] jamssx:
I just went back through my search history. The driver error I was thinking of gives 80070490 so it's not your problem. Does IUTool-{299338D7-E9AD-4D02-BD74-B341894FDEEF}.etl say anything interesting? All I can find for that code is the really helpful "A COM class is not registered".
[Windows Phone 8 General] tienbuih:
When Microsoft announce Windows 10 upgrade for the Lumia 640, how can we upgrade the de-branded Lumia? I assume the de-branded Lumia can get T-mobile Windows 10 OTA, am I right? :confused:
[Windows Phone 8 General] Saijin_Naib:
Thanks for the guide! I just unlocked my ATT GoPhone Lumia 640 so that I could cross-flash it to the CricKet ROM.

Thanks so much again!
[Windows Phone 8 General] fossils:
I am having an odd problem after unbranding the phone, the phone becomes unresponsive and then reboots when connected to wifi. Note I did not have this issue on the original AT&T Rom as I was able to update to windows 10 preview without any issues. Note that I have used the windows recovery tool a few times and the problem persists each time. The odd thing is after the initial flashing, the wifi lock/reboot problem does not immediately appear during the initial screens (wifi, account, unlocking, etc). The wifi lock/reboot appears a few minutes after the initial applications are setup. Note that I have been able to update the apps from the windows store and the problem still persists after the initial wifi/lock appears. The wifi lock/reboot occurs after flashing and the initial app set up, even without taking any windows store or phone updates. Hard resets do not fix the issue either. Once the fist lock/reboot issue occurs on a flash, the phone persists the issue within 5 seconds of turning on wifi. Any suggestions?
[Windows Phone 8 General] ntice:
EDIT: Switched to a different USB port and now it's working.

Thor2 is crashing on me. As soon as the phone reboots, thor2 crashes. The log file follows. Any ideas?

[08:10:10.035] D_MSG : THOR2 1.8.2.18

[08:10:10.035] D_MSG : Built for Windows @ 13:36:46 Jun 16 2015

[08:10:10.051] D_MSG : Thor2 is running on Windows of version 6.2

[08:10:10.051] D_MSG : thor2 -mode uefiflash -ffufile tmo.ffu -productcodeupdate 059X0P7 -skip_flash

[08:10:10.051] D_MSG : Process started Tue Mar 15 08:10:10 2016

[08:10:10.072] D_MSG : Debugging enabled for uefiflash

[08:10:10.072] D_MSG : Initiating FFU flash operation

[08:10:10.072] D_MSG : WinUSB in use.

[08:10:10.084] D_MSG : isDeviceInNcsdMode

[08:10:10.115] D_MSG : Normal mode detected

[08:10:10.115] D_MSG : Rebooting to the normal mode...

[08:10:11.304] D_MSG : Resp from NCSd {"id":7,"jsonrpc":"2.0","result":null}
[Windows Phone 8 General] kooltiger:
This method always gives me an error.

I followed everything, downloaded and installed tools, After hitting the command for the first time. it copied those files to my phone, BUT it said installation failed, but the strange thing was it rebooted my phone and updated something. And I can not install any other rom or firmware. Please help
[Windows Phone 8 General] ntice:
What is the password?
[Windows Phone 8 General] AndrionGames:
Worked really well, easy to follow. Thanks!
[Windows Phone 8 General] daedalustest:
Help on installation

C:\Program Files (x86)\Windows Phone Kits\8.1\Tools\bin\i386>iutool.exe -p C:\Lumia -V

(IUTool Version: 11:52:10/Feb 7 2014)

Log file: C:\Users\Sherman\AppData\Local\Temp\IUTool-{299338D7-E9AD-4D02-BD74-B341894FDEEF}.etl

Thanks for all the information on this. I am trying this out but encountering a problem on the first step. I am hoping some one has some insight on the error code as I cannot figure out what is wrong. Thanks in advance.

[1] Started device 5fbe4d89668da4626023b4c702a39fcf

[1] Transferring files started

[1] Transferred file 1/3

[1] Transferred file 2/3

[1] Transferred file 3/3

[1] Transferring files complete: 3 files

[1] Update started

[1] Installation failed (HRESULT = 0x80188302)

[1] Failed (0x80188302)

ERROR: 0x80188302

Command failed. (HRESULT = 0x80188302)
[Windows Phone 8 General] jamssx:
It says package already installed. So you should move on to the flashing.
[Windows Phone 8 General] daedalustest:
Thanks. However, the phone never restarted and applied the cabs. Nor did it start up with the "migration" loading screen. I am concerned that I might have corrupted the process as it hung in the middle the first time I tried.