Differentiate between Cat-M and NB-IoT

[Fredrik Flornes Ellertsen]

Hi Aleksander,

> Could you let us know which modem you're using and which commands (AT
> commands I assume) can be used to query whether Cat-M, Cat-1 and/or
> NB-IoT are supported, and how to change them?

I'm targeting Fibocom MA510/MC610 modems. Unfortunately the AT command manual is
confidential so I can't share the details, but suffice it to say that there
exists a command +FOO: 
 - AT+FOO=... will set the current and preferred access technologies (AcTs). 
 - AT+FOO? will get the current and preferred AcTs. 
 - AT+FOO=? will list all supported AcTs. 
The AcT list enumerates GSM, LTE, eMTC, NB-IoT, Automatic, and sensible 
combinations of those.

I hope this is sufficient to describe where I'm at.

Thanks a lot!
Fredrik