Download Blackberry Facebook App
Step 1: Move your finger left on the display to open the main menu. Tap BlackBerry World.
Step 2: Faucet Search.
Step 3: Type in Facebook as well as touch Search.
Step 4: Tap Facebook.
Step 5: Faucet Download. Wait a minute while the application is installed.
Step 6: Glide your finger up the display screen starting from the bottom edge of your smart phone to go back to standby setting.
I wish the above brief tutorial could help you. Thanks.