Speed difference between CAT 1 and CAT M1 is significant. Although telematics devices do not need high speed network, because it sends small bits of data and for a long time 2G was enough, since 2G will eventually shut down entirely we are moving on to new network technologies.
LTE Cat-M1 fastest growing network in the world. Worldwide mobile operators predict that Cat-M1 technology will be the one which will change 2G network.
FMC coverage will depend on module by region, which means that there will be several different versions of FMC devices suited for specific regions.
FMM will have one global module, but that doesn’t mean it will work worldwide at the moment. In the link below you can find guidelines (not a fact!) where CAT M1 (LTE-M) technology supported:
GSMA | Mobile IoT Deployment Map | Internet of Things
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