2) To view the Caller ID messages in historical order (from new to old or from old to new), repeatedly press volume down to scroll through the messages from the latest to the earliest, or volume up to scroll back through the messages. To search the Caller ID messages alphabetically, press the number key pad (2-9 and 0) with the letter associated with the first letter of the desired caller.
Once you view the Caller ID list with alphabetical search, you cannot switch back to historical order (from new to old or from old to new) unless you exit and re-enter the operation.
During a call, don't press end on the handset or the call will be disconnected.
3) To finish viewing the Caller ID list: From Handset - press end (or the BACK soft key or talk/flash during a call).
From Base - press exit key or the BACK soft key.
Once the Caller ID data has been deleted, the information cannot be retrieved.
Deleting a Caller ID Record
When the phone is in standby mode, navigate to the Caller ID information to be deleted (see "Viewing the Caller ID List" on page 51).
From the base, press the DELETE soft key. From the
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handset, press the EDIT soft key, then select Delete?. Delete Caller ID appears.
Press volume up/down to choose Yes.
Press the OK soft key. You will hear a confirmation tone.
CALLER ID AND CIDCW (CALLER ID ON CALL WAITING) 
CALLER ID AND CIDCW (CALLER ID ON CALL WAITING)