HSPA stands for High-Speed Packet Access, and it allocates for much higher data rates for internet connectivity. There are two attributes to this technology, and each is more or less distinct from the other. HSDPA stands for High-Speed Downlink Packet Access.
This one enhances the uplink or communication from the mobile device to the network. Standard practices that would be influenced by having HSDPA involve watching online videos, browsing sites, downloading files to sites, or seed files in a file-sharing network. HSUPA boosts the speed at which you complete your tasks.
It is customary practice for most mobile networks to display HSDPA first before doing HSUPA. There are specific parts of the world in which only HSDPA is utilized, while HSUPA is still almost absent. This absence is because telecoms want to distribute as much bandwidth to downlink as they can while spending as little money as possible.