[Q] Downgrade Lumia 800

[ybregeon]

Hi everyone,

I recently flashed my Lumia 800 with the chineese version of Tango (Firmware version 1750.0805.8773.12140) and everything went fine, but I am wiling to downgrade to install the last official firmware available in my country, the 12072 one.
Can you tell me if it's possible to downgrade (my Lumia is branded and until now i don't find a way to unbrand it), and tell me if this downgrade will have an effect on the future upgrade process. Thank you for any help.

 

[cioculetsv]

Use Nokia Care Suite. Pick the disered firmware from Navifirm+.

Sent from my Lumia 800 using XDA Windows Phone 7 App

 

[ybregeon]

Thank you, I did it with NaviFirm and Nokia Care. Thanks for help