EC-GSM-IoT- Extended Coverage GSM IoT- it is an extension of the GSM (Global System for Mobile Communications) standard, specifically designed to provide extended coverage for IoT devices.
LTE-M (LTE for machines) - Low-power wide-area (LPWA) cellular technology operates on LTE networks and infrastructure to provide better coverage and lower latency for IoT devices.
NB-IoT (Narrowband IoT) - another LPWA cellular technology which operates in the narrowband spectrum, enabling efficient use of resources and allowing a number of devices to connect simultaneously.
These technologies are designed to meet the diverse requirements of IoT applications, offering different combinations of coverage, power consumption, data rates, and cost-effectiveness.
Depending on the specific needs of an IoT deployment, one of these technologies may be more suitable than the others.