3G HSDPA is Third Generation High-Speed Downlink Packet Access - a 3G mobile telephony protocol, which offers increased data transfer speeds and capacity of up to 7.2 Mbps on the downlink and up to 384Kbps on the uplink, under ideal conditions. The 3G HSDPA technology was built to deliver throughput speeds of up to 7.2Mbps for downloads, but expect to experience speeds between 400 Kbps and 800 Kbps with peaks of approximately 1.2 Mbps - offering you instant Internet access.