Samsung Moment :: App Or Option Where Can Use Pass-code To Unlock Phone Rather Than Pattern?

This was pointed out earlier by someone on a thread and I couldn't seem to find it. But just to point it out again the moment can be turned off or put on airplane mode even while its locked. This may be a bad thing if someone steals your phone and you want to use someones phone to either call or text it so that it will ring to find out who has it. All the thief has to do is put it on airplane mode or turn it off to deactivate ringers, sound, and gps.

Is there an app or option where I can use a passcode to unlock the phone rather than the pattern?And is there a way to track my phone through gps just in case it's lost or stolen?Any ideas or suggestions if a device someone rely relies on a lot is lost or stolen? My friend on his moment was able to add a message on the home screen saying "If found please contact "phone number" "email" and will be given a "$300" reward.