Blackberry 6720 - Manual (Page 82)

Sending and reading SMS messages
82 BlackBerry Wireless Handheld
To remove SMS message history
1. On the Home screen, click the Messages icon. The Messages screen appears.
2. Select a sent or received SMS message and click the trackwheel to view the
menu. Click Open.
3. The message appears on your screen at the top of a session view. Scroll to the
message that you want to remove from the session view and click the
trackwheel to view the menu. Click Remove History.
Open SMS message menu - Remove History item
The SMS message that you select and all prior SMS messages that you sent to or
received from the contact in this thread are no longer listed in the session view.
The individual messages are still listed on the Messages screen.
Note: The Remove History menu option is only available if you select an SMS message
that contains a history.
Note: You cannot remove the most recent SMS message from the session view.