BBM (BlackBerry Messenger) is an instant messaging application that comes preloaded on all BlackBerry devices. Every BlackBerry phone is assigned a unique PIN (Personal Identification Number). BBM communication works only between BlackBerry devices. You can send text messages, pictures, voice notes, files and your location through BlackBerry messenger to another BBM user. If you are not using the BlackBerry Messenger and want to delete your BBM account, you can simply remove the BlackBerry Messenger from your device.
Open the browser by clicking the browser icon on your Blackberry device. Visit the “BlackBerry App World” website (see Resources).
Click “Download Now.” Select the language from the drop-down list, and then press “Next.” Confirm the downloading of “BlackBerry App World” by pressing “Download.” If your BlackBerry device already has a BlackBerry App World, it will be replaced with the latest version. Press “Reboot” to restart your BlackBerry device.