is also known as Evolved High-Speed Packet Access. It is a mobile broadband protocol that was defined by the 3GPP standard, release 7. In Theory, the HSPA+ data rate can go up to 84 Mbps (Megabits per second) downstream (to the mobile), and 22Mbps upstream (back to the tower). These numbers are achieved by using multiple streams, so they should be considered theoretical and peak performance numbers. The HSPA+ specifications support up to 168Mbps of theoretical peak rate. Although many HSPA+ carriers call it 4G, it is very different from 4G LTE.