U niversal M obile T elecommunications S ystem www.iec.org/online/tutorials/umts
View page
UMTS is the 3rd generation wireless technology while HSDPA (High
Speed Downlink Packet Access) is the feature of UMTS technology
where users can download a stream of 14.4 Mbps with HSDPA.
View page
3G is 3rd generation mobile technology. UMTS is one of the
technologies under 3G, just like CDMA2000.