HI irl-tony , Once a new simcard being inserted to the stolen phone, the number will be send to the trusted number you have configured unless the thief remove the program from your phone where he/her should not be able to if it is pin protected. Once you received the number, you can send the message #LOCATE# from your trusted number to the new number to locate your phone provided the GPS is not turned off by the thief.
... View more