GPS.cards SIM for BI 810 TREK Position Monitoring Device + Realtime Locator GPS.cards SIM is a prepaid SIM card specially designed for GPS Trackers. It is compatible with 4G, 3G, and 2G devices, supporting over 1500 GPS Tracker models. The SIM card offers a TurnKey Mobile App for GPS Tracking, making it easy to monitor locations in real-time. With its affordable pricing compared to regular cell phone prepaid SIM cards, GPS.cards SIM is the ideal choice for the BI 810 TREK Position Monitoring Device + Realtime Locator. Key Features: Prepaid SIM card designed for GPS Trackers Compatible with 4G, 3G, and 2G devices Works with over 1500 GPS Tracker models TurnKey Mobile App for GPS Tracking Easy installation Affordable pricing