Lumia930

Hi I have a Lumia 930 phone (+mic #3 & #4 problem). I want to upgrade it's firmware, FROM: PackageTitle: RM-1045 VAR APAC HK CV BLACK Product Code: 059W0J7 Last Firmware: 02540.00019.15053.26005 TO: PackageTitle: RM-1045 VAR EURO GB CV BLACK Product Code: 059W004 Last Firmware...