To clear the Call log

Clearing the Call log all at once

Touch the Phone Key (in the Quick Keys bar), then the Call log tab at the top of the screen.
Touch the Menu Key .
Touch the Clear all > OK .

Selectively clearing the Call log

Touch the Phone Key (in the Quick Keys bar), then the Call log tab at the top of the screen.
Touch the Menu Key .
Touch the Clear and then checkmark the call entries you want to delete.
Touch Delete > OK.

[Note]

You can also selectively delete by touching and holding a Call log entry, then touch Remove from Call log > OK.