Another good application (and not so expensive as Lookout,
Wave Secure or Theft Aware) is Remote Security.
It allows you to send commands to your phone via SMS
from another phone (you have to choose the other phone when you configure it).
One of the best features of this application,
is that if someone steals your phone,
you can know its location, lock the phone,
and if the thief changes the SIM card,
Remote Security sends you an SMS to your other phone,
with the number of that SIM card (and then the Police will know who is the thief!
