With SIM Checker you'll have a sort of Find my iPhone but for Android. How it works isn't very similar to the application developed by Apple, but its purpose is the same: help us to find our phone in case of loss or theft.
How does SIM Checker work?
By downloading the APK of this security and antitheft application, you'll have to punch in an alternative phone number and an email address where you'll receive a notification if someone takes your SIM card out of your phone.
Find the exact location of a stolen mobile phone.
Thus, if lost or stolen, if someone were to keep your handset replacing your card with their own, you'll receive an SMS or email with the GPS coordinates of your phone, so that you can notify the authorities and recover your smartphone.