The Galaxy Note 4 is already one of Samsung's best smartphones, but a new model focused on maximizing 4G could make it more of a catch. The LTE-A Tri-Band CA Galaxy Note 4 (what a mouthful) can handle three different frequency bands simultaneously and aggregate them into a single, theoretically faster connection. The improved handset, which Samsung says is the first "commercially available" smartphone with such a setup, supports both Category 6 (up to 300 Mbps) and Category 9 (up to 450 Mbps) LTE networks -- but the kicker here is its ability to pick out and jump between the best available bandwidths.
In practice, it should mean consistently faster connections, provided your carrier's network has been upgraded to support the blistering speeds. Anandtech reports that it's also packing a Qualcomm Snapdragon 810 chipset, which would be an improvement on the standard Note 4's Snapdragon 805. However, at the moment there's nothing to suggest the new model will be sold beyond Korea. That's understandable -- until Category 6 and 9 networks are the norm, it makes little sense for Samsung to push such a device worldwide.