The Samsung Galaxy Note 4 LTE-A features LTE Advanced Tri-Band Carrier Aggregation, which Samsung says is the first commercially available phone to have that feature. The LTE-A Tri-Band CA functionality allows the Note 4 LTE-A to reach peak download speeds of 300Mbps with Category 6 service. How? Well, as its name suggests, LTE-A Tri-Band CA takes in three different frequency bands and then combines them into one connection.
Samsung also says that the Note 4 LTE-A Tri-Band CA is future-proofed because it’s LTE-A Category 9-ready. That service will offer speeds of up to 450Mbps and is expected to be commercialized in 2015.
Outside of the enhanced LTE connectivity, the Galaxy Note 4 LTE-A is the same as the Note 4 that's in many pockets. That means that it’s got a 5.7-inch 2560x1440 Super AMOLED display, 16-megapixel rear camera, 3.7-megapixel front camera, 3GB of RAM, and a 3220mAh battery.
There’s not much information available regarding the Note 4 LTE-A Tri-Band CA’s availability, but we haven’t seen many Galaxy-branded LTE-A phones released outside of Korea, and I wouldn’t expect this Note 4 to be any different.