NB-IoT and LTE Cat M1: Cellular Connectivity for Fleet Telematics

The global sunset of 2G and 3G networks is reshaping fleet telematics connectivity. NB-IoT (Narrowband IoT) and LTE Cat M1 (also called LTE-M) are the two LPWAN (Low-Power Wide-Area Network) technologies designed to replace legacy cellular for IoT applications including GPS tracking. LTE Cat M1 is the primary choice for vehicle tracking. It provides sufficient bandwidth for real-time tracking data, firmware updates, and even small file transfers (like tachograph files), while consuming significantly less power than standard LTE. Cat M1 supports mobility and handover between cell towers, making it suitable for moving vehicles. Data rates of 375 kbps to 1 Mbps are more than adequate for telematics data streams. NB-IoT is optimized for stationary or slow-moving applications with very low data volumes. Its extreme power efficiency makes it ideal for asset trackers that report position infrequently (once per hour or less) and need multi-year battery life. However, NB-IoT does not support handover between cells, making it less suitable for fast-moving vehicle tracking. The Ruptela Smart5 and advanced device series support both Cat M1 and NB-IoT with 2G fallback, providing maximum flexibility across network conditions and operating regions.