If you have a lot of messages taking up memory space on your BlackBerry phone and slowing application load times, you can empty the deleted messages through the “Options” feature. With this function, removal can be accomplished in a few clicks and you can free up memory you need for other applications you use on the phone. You may have hundreds of messages still waiting to be purged on your phone.
Scroll to the “Messages” icon and tap it or press the trackball to open it.
Press the “Menu” key and select “Options” tap it or press the trackball.
Scroll to “Email Reconciliation.” Tap it or press the trackball.
Select “Purge Deleted Items” and tap it or press the trackball.