Updating operating system on blackberry
In between OS 4 and OS 5, you could have say, 4.34.989 or 4.89.000 .
It is assumed on this page that your carrier is Verizon Wireless; if your carrier is different, the process should be virtually identical except for the download location.
Without your Blackberry OS, your Blackberry is just a dead bunch of neatly assembled hardware.
Blackberry Operating system software come in versions , i.e 4.x.x , 5.x.x , 6.x.x, 7.x.x , 10.x.x etc.
You can update the phone's software when a new software version is available.
Follow these instructions to update your phone's software.