Just checked on a VZW device (normal data plan) in the US and saw the footer on m.facebook.com and it indeed hits a domain like "lm.facebook.com" before redirec

Just checked on a VZW device (normal data plan) in the US and saw the footer on m.facebook.com and it indeed hits a domain like "lm.facebook.com" before redirecting to the Verizon page, which was in German. I think the message is just something about the domain being inactive. It must be some old marketing WAP page that's no longer in use.