My Samsung Galaxy S3 GT-I9300 is currently running Android version 4.3.0. I wanted to downgrade it back to 4.1.2 and got confused with which values to look for when selecting a rom. I know that my carrier is TEN (Telenor) Norway and that my PDA is I9300XXUGNG3. Looking up that combination I managed to verify that my carrier is indeed Telenor. Based on that, can I pick any 4.1.2 firmware that is associated with my carrier?