An Active Track device can be configured in two ways: by using a set of AGP3 cables or by sending text message to the device's card number.
You can watch the video presenting how to configure the Active Track device:
Insert SIM card without PIN CODE to charged device then send text to it.
Example of message: 1111 SERVER=18.104.22.168 PORT=7407 APN=internet KILL
NOTE: APN depends on GSM provider. SIM card must have credit to connect server by GPRS.