How to flash back to AT&T Stock ROM for Nokia Lumia 920

[WP_ben]

As the title says...i am struggling here to flash back to att stock rom for my nokia lumia 920.

i m currently on product code 059S0M9 Version 3051.50009.1424.0001 Latin MX rom

I am trying to go back to ATT stock rom 059N5T3 version 3051.50009.1425.2001 RM-820 America ATT White

It gives me error code when i tried to flash:
0xFA001304: Platform ID check fails. Reason(s): The FFU file is not meant for this product. The platform ID of image does not match with platform ID of the device. Exception: Nokia.CareSuite.PlugIns.MurzimRecovery.RecoveryDialog.MurzimProgrammingException: 0xFA001304: Platform ID check fails. Reason(s): The FFU file is not meant for this product. The platform ID of image does not match with platform ID of the device. at Nokia.CareSuite.PlugIns.MurzimRecovery.RecoveryDialog.RecoveryDialogModel.Flash() at Nokia.CareSuite.PlugIns.MurzimRecovery.RecoveryDialog.RecoveryDialogModel.<HandleDownloadVariantPackageCompleted>b__c(Object state)

IS there anyone have any ideas how to switch back to ATT stock rom??

 

[jhoff80]

It's not possible.

 

[WP_ben]

have you tried to flash it yet?

 

[SocalTouch]

You cannot get back to AT&T ROM but can get to AT&T Developer Device ROM. It requires use of Nokia Software Recovery Tool and a proxy like Fiddler.
Follow the steps in my post here - http://forums.windowscentral.com/nokia-lumia-920/305090-5.htm#post2851840

 

[surya kiran]

Check this thread:

http://forums.windowscentral.com/nokia-lumia-920/230531-2.htm

 

[PepperdotNet]

Follow the same steps you did to get where you are now. Rogers "pre-portico" and then the stock AT&T rom. It's the updating of the Rogers rom that gets it to the point where it won't accept an AT&T rom.

The "AT&T Developer Device" ROM is not AT&T, it's an unbranded Canadian one. I don't know why they call it that.

 

[jhoff80]

Follow the same steps you did to get where you are now. Rogers "pre-portico" and then the stock AT&T rom. It's the updating of the Rogers rom that gets it to the point where it won't accept an AT&T rom.

Completely wrong. If you ever updated the Rogers ROM past pre-portico, then you cannot flash back to Rogers pre-portico ever again.

 

[PepperdotNet]

Completely wrong. If you ever updated the Rogers ROM past pre-portico, then you cannot flash back to Rogers pre-portico ever again.

That contradicts what I've read elsewhere. Guess it's time to actually try it myself.
Edit: you may be right about that.

 

[WP_ben]

That contradicts what I've read elsewhere. Guess it's time to actually try it myself.
Edit: you may be right about that.

I actually tried to flash last month.
I tried to backdate to pre-portico rom from MX rom & Roger Wireless rom.
Both rom can not be flashed to pre-portico rom =((

let me know what your result is.

 

[PepperdotNet]

let me know what your result is.

What can I say? Crow don't taste so good.

Weird that the at&t rom can take a downgrade like Rogers pre-portico but the others can't. I wonder if there's a Rogers pre-portico for the 1020.