About HSDPA+ (High-Speed Downlink Packet Access Plus)
HSDPA+ (High-Speed Downlink Packet Access Plus) is an upgrade for UMTS networks that increases download speed and doubles network limitby multiple times or more.
HSDPA just handles the downlink while the uplink is dealt with by a related technology called HSUPA. The blend of the two is normally called HSPA.
The service was at first deployed at 1.8 Mbps however moves up to the networks and new devices prompted expanded rates of 3.6 Mbps, followed by 7.2 Mbps and further not far off, 14.4Mbps and even 21Mbps.