Multi-choice problem: Continue writing the next sentence in this paragraph:

How to deactivate facebook on blackberry
Launch facebook.
Locate the blue " f " app icon of facebook on your blackberry device and tap it.
Log in.

pick from the following.
(1). If you already have an account, enter your username and password on the required fields and tap " log in ". You'll need to create your account before you can take off your mobile phone entirely.
(2). You can do this from any of the following websites : On facebook: sign in your facebook account. On an iphone: sign in at the designated login screen.
(3). Enter your facebook login details on the text fields provided then tap the log in button to continue. You will be asked to provide basic information such as your birth date and email address.
(4). You may still be logged into your account after your previous session. If this is so, just skip this step; otherwise, enter the email address, or username, and password of the account you want to deactivate into the fields on the welcome screen.
(4).