Is NB2 generally backward compatible with NB1

We are evaluating BC66 and BC66-NA modules. We observed that BC66-NA supports NB2 only.

The carrier supports only NB1, hence does NB2 (BC66-NA) have backward compatibility with NB1 carriers?
Are there are special settings that has to be configured?

Yes, NB2 is backward compatible with NB1, no relevant configuration parameters are required. Our module supports NB2, but the local carrier radio network also supports it.

Thank you, I assume then it should not be a problem for us to use NB2 devices.