All NFC, BT, WLAN and GSM-cell change, and proximity change alarms could be useful.

NFC-alarm can be replaced with acceleration check, when the device is in stationary place, so no other type of acceleration is happening like if phone would be in a moving car.

These features could be in Smscon.

When alarm is triggered, different SmsCon actions could be configured. Sonic alarm would be silenced with Smscon password.