how to regenerate encryption key on blackberry

In order to generate a new encryption key on your BlackBerry® device, you need to have version 4.0 of the software (or newer) installed on the device.
To generate a new encryption key:

1. From the Home screen, click Options, or click Settings > Options (depending on the theme you have running on your device).
2. Click Security Options, then General Settings.(If your device is running version 4.0 of the software, click Security.)
3. Scroll down to the Service section and click the trackwheel.
4. Select Regenerate Encryption Key.
5. When you see the message "The key for service has been updated," click OK.