Please make sure you have entered the number correctly without starting by Zero and to choose the correct country code.
Remote identification: Takes a picture of the thief, known as Thief, when he/she tries to unlock the device (can use front or back camera, with face recognition).
Password check: Marks the device as stolen if a wrong locked screen password is entered 3 times.
Remotely send SMS: Your device will send them for you.
Remote data retrieval: Retrieve call logs, SMS messages, and other personal data from your phone before remotely wiping its memory.
Disable Airplane mode: after turning on airplane mode, SmSimApp will disable it instantly.
Send SMS notification when SIM Card is changed.
Send Location by SMS when SIM Card is changed.
Locked Phone when SIM card is changed.
Changed secure password remotely by SMS or from the CPanel.
Changed Recovery number remotely by SMS or from the CPanel.
From within the app configuration, you can enable some options to make difficult for the thief to disable or uninstall SmSimApp. Make sure to enable the "Device Administration" functionality and the "Protect device admin" option. Also you can block the Power Menu to prevent the thief from shutting down the device, and block access to the status bar in the lock screen, so nobody would be able to change the quick settings in all (Android).