how-to flash a telco branded/locked 1020 to GDR3 developer preview

[JediTWang]

I found this, but I understand I also need to know the product code, so that I know which fw to d'load etc:
Download Official Nokia Firmware Even Without Navifirm+
Is there a comprehensive guide for L1020 owners out there somewhere?
I've "just" started my own research on this, so hopefully I'll find something in the meantime.
Basically I want to get rid of the crippled environment my telco (Telstra) created for me, & move to the most bleeding-edge version of vanilla WP8.

Thank-you.

Live Notes:
Google search: lumia 1020 product codes
*UPDATE*
Found a bunch of interesting links, too busy/tired to grok through it all tonight, will pick this up again tomorrow.
If anyone can outline all necessary steps in 1 concise post in the meantime, please do.

 

[montsa007]

All I know is - Stay in the same product family (RM - 875, 876 & 877), if you try to go out of that, you'll be inviting trouble.

 

[JediTWang]

Any concise/clear guides specifically for telco branded 1020 owners looking to de-brand to a more generic env. that's "bleeding edge"?

 

[montsa007]

Telco is in Europe or North America?

 

[JediTWang]

Australia, Telstra, by far the single-biggest one.

 

[montsa007]

http://forums.windowscentral.com/no...020-complete-list-variants-product-codes.html
Find your product code here

GSM-Forum - View Single Post - Nokia Product Code Listing for Care Suite Download - (Nokia 925T Added)

Seems yours is RM 875 (Plenty of choice), I am not sure which product code you should use because there are like a gazillion, but you should find like the one that is non branded, and flash that to your phone.

 

[JediTWang]

Thanks, seems much like all the other links I've gathered, now I just have to find the time/energy to sift through all that info...
Upon quick perusal the trickiest bit seems to be removing my current (latest version) of nokia suite & installing nokia care (with the right config file), assuming they can't run in parallel.

 

[montsa007]

May the force be with you, I am of no help now lol.

 

[JediTWang]

Thanks buddy, really appreciated.

 

[Rhuan Carlos]

hey guys, I've just got my Nokia 1020 with the Vodafone logo in the initialization. Although it has no simlock, I wanna remove it and probably downgrade to GDR2, because since the upgrade, my camera sucks, it gives me very very yellowish pics.
Does anybody have a tutorial?
Further details:
Model: Nokia 909 (it's 1020 - black version, but it shows me this model)
Firmware number: 3049.0000.1330.1005
Hardware revision number: 1.0.0.0
Mobile Operator: Vodafone Germany
Manufacturer name: RM-875_eu_euro2_206
Configuration ID: 255907

 

[JediTWang]

@mods, please close this thread
This thread started by me is long since dead, I started a new one here:
http://forums.windowscentral.com/no...product_code-variant-order-dload-best-fw.html
Spoiler alert, I still have lots of Qns myself, not concrete solutions yet...