GPS.cards SIM for BI 820 TREK Monitoring Device + Hassle-free GPS Tracking Enhance the performance of your BI 820 TREK Monitoring Device with the GPS.cards SIM. This SIM card provides hassle-free GPS tracking ensuring seamless and reliable monitoring wherever your device goes. Compatible with 4G 3G and 2G devices as well as over 1500 GPS tracker models this SIM card offers versatility and convenience for all users. Compatible with 4G 3G and 2G devices Works with over 1500 GPS Tracker models Includes TurnKey Mobile App for GPS tracking