To access BlackBerry services and applications, a BlackBerry ID is required, ie a BlackBerry account. With a BlackBerry ID you can access BlackBerry World, the BlackBerry App Store, from where you can download applications and games for your smartphone. All your information and applications are stored in your account, which will be very useful in case of loss of your device.
Creating a BlackBerry ID is free and you can do it from your computer's web browser or from your BlackBerry.
How To Create a BlackBerry ID Online
Go to the BlackBerry ID page and complete the subscription form. Your username will be your email. After entering all the requested information, click Send:
To finish creating your account, you must confirm your email. Open your inbox and click the link you received from the BlackBerry side.
How To Sign Up For a BlackBerry Account From a BlackBerry (v7.1)
On your smartphone, tap the BlackBerry App World > My World icon. Scroll to the bottom of the screen and press Create New. Accept the terms and conditions and follow the instructions that appear on the screen.