I want to know if nighthawk xr450 compatable with optimium and what is the difference between nighthawk xr 450 and Nighthawk AC1900 in terms of connectivity?
Yes it works with all ISPs/connections. I couldn't say precisely as I work for Netduma (creators of the software for the XR range) so can only really give you an idea of the features of those routers. May be best to have a look online and compare them.
