Software For BlackBerry® Curve(TM) 8520 Smartphone BlackBerry Handheld Software v4.6.1.473 (Multilanguage) Package Version: 4.6.1.473 Consisting of: Applications: 4.6.1.320 Software Platform: 4.2.0.137 File name: 8520wifiM_PBr4.6.1_rel473_PL4.2.0.137_A4.6.1.320_Fido.exe File size: 117.8MB Note: The Software Platform and Applications version numbers can be found under Options-About screen on the handheld. Download: OS 4.6.1.320 for the BlackBerry Curve 8520 from Fido How To: Backup And Restore Your BlackBerry Upgrade your BlackBerry Operating System (OS) Please report any feedback/findings in the comments. REMEMBER: It is recommended that you make a backup before attempting to upgrade your BlackBerry just in case something goes wrong during the upgrade process. * Related Posts: Official OS 4.6.1.318 For The BlackBerry Curve 8520 From E-Plus [Operating System] Official OS 5.0.0.395 For The BlackBerry Curve 8530 From Sprint [Operating System] Official…