Software For BlackBerry® Curve(TM) 8520 Smartphone from carrier SIMobile, this OS will load to any 8520 model BlackBerry Handheld Software v4.6.1.439 (Multilanguage) Package Version: 4.6.1.449 Consisting of: * Applications: 4.6.1.305 * Software Platform: 4.2.0.130 * File name: 8520wifiM_PBr4.6.1_rel449_PL4.2.0.130_A4.6.1.305.e xe * File size 118mb download Select SIMobile carrier WARNING: Do not install this software if you do not know what you are doing. DWIYOR (DO WITH YOUR OWN RISK)