New OS BlackBerry 8520 v.

Software For BlackBerry® Curve™ 8520 Smartphone

BlackBerry Handheld Software v5.0.0.1728 (Multilanguage)

Package Version:
Consisting of:
Software Platform:
File name: 8520wifiM_PBr5.0.0_rel1728_PL5.2.0.96_A5.0.0.1067_AT_T.exe
File size: 125.47MB
Note: The Software Platform and Applications version numbers can be found under Options-About screen on the handheld.

Link Original : 

Local Link ( thanks to repo.antihackerlink )