The Samsung Galaxy Note 4 LTE-A offers LTE Advanced Tri-Band Carrier Aggregation and Category 6 LTE connectivity that provides speeds of up to 300Mbps. It does so by combining three frequency bands into one connection. And just in case that isn’t fast enough for you, Samsung says that the Note 4 LTE-A is future-proofed with support for LTE-A Category 9 service, which supports speeds up to 450Mbps.
As for availability, Samsung’s previous LTE-A smartphones haven’t seen releases outside of Korea, and so we wouldn’t be surprised if that’s the case with the Note 4 LTE-A too. That may be kind of a bummer, but hey, at least that it means that you needn’t worry about your current Note 4 being out of date so soon.