One of the many benefits of having a BlackBerry smartphone is its ability to download applications that let you access third-party services such as your social-network accounts. Twitter is a social network that has are several BlackBerry applications, including UberSocial and Twitter for BlackBerry. You can add multiple Twitter accounts to these clients, both of which allow you to switch back and forth between accounts. It’s also easy to delete a Twitter account fro your BlackBerry Twitter client.
Launch your Twitter-client application on your BlackBerry phone. You can find this in your Downloads or Applications folder.
Press the “Menu” button with the BlackBerry logo next to your trackpad or trackball.