Options>> Security Options>> General Settings>> Menu button (left of trackball) select Wipe Handheld
I am not sure what it is specifically on the 9700. Wipe Handheld will wipe out ALL customer data on the phone.
Bro i dont find general setting option in security option ..
the option i get in security option are
encryption
firewall
information
security wipe
i guess am on os 5 ?