Trusted Reviews looked at the T-Mobile Web "n" Walk HSDPA Data Card

But as fast as 384Kbit/sec seemed a year or so ago, it's starting to
look a little tired now as broadband speeds increase, so it's probably a good
thing that HSDPA has finally broken cover. HSDPA or High Speed Downlink Packet Access is an evolution of the 3G data standard and provides a
significant increase in speed, so much so that network operators in the UK have called the new standard "Mobile Broadband".

T-Mobile Web "n" Walk HSDPA Data Card Review