What is the 3G+ network?

3G+ and 3.5G are different names for HSDPA (High Speed Downlink Packet Access), a mobile broadband network standard that delivers faster download speeds, up to 21 Megabits/second. This speed is perfect if you download images, videos or music occasionally, surf the Web or are downloading other large files. 3G+ is part of the Universal Mobile Telecommunications System (UMTS) and a natural evolution for many 3G (third generation) mobile cellular communication systems. More information on the family of GSM network standards is available from the GSM Association.

See also, What is the difference between UMTS, 3G and EDGE networks?