not a samsung user, but i can tell u from experience from
nokia's point of view:
if u set a PIN code lock, it will be applicable to the SIM card.
u'll be required to enter a code whenever ur phone starts up, as
long as the SIM card is used. if u put this SIM card on other
phones, the other phones will prompt for the PIN code too.
this means the person will never have access to your SIM card,
contacts stored on the SIM card and cannot use the line as
well.
if u set a security code lock, it will ask for a security code if
the SIM card used is not one of the last 3 SIM cards used on the
phone. that means, the person will never have access to your phone
unless they bring to those cheong shop or samsung service centre to
have the phone reset and software upgraded.
