Compatability with Traditional Cell Service

So I have been wondering this for a while but can’t get a definite answer. Will the Librem 5 be compatible with traditional American Cell Providers (Verizon, AT&T, T-Mobile etc) I know that CDSM is pretty much a no-go but any American Cell Providers that use GSM have to accept a phone that is GSM compatible, correct? I realize communicating via Matrix is supposed to be the preffered option but i don’t really understand how it works and I suspect I will have difficulty converting my family and friends to a service they probably havn’t heard of.

On a side note, if someone could better explain how Matrix works, I would be most appreciative.

(edit)Consider this post closed, I don’t know how to make it appear closed but I found my answer on the product page…I can’t believe I missed it but it’s there