Difference between FMU/FMM/FMC/FMB

The main difference between FMU/FMM/FMC devices is installed module.
- FMB have Bluetooth, GNSS and 2G network technology support.
- FMU have Bluetooth, GNSS and 3G (2G fallback)
- FMC have Bluetooth, GNSS and 4G (3G and 2G fallback)
- FMM have Bluetooth, GNSS and LTE CAT M1 (2G fallback)