Circuit Switched Data (CSD) was how mobile phones accessed data services in the early days, or at least the technology that allowed them to try. Technically equivalent to a dial-up modem, it allows speeds of up to 9.6Kb/s, ideal for downloading the latest news and reviews from the Mobile Internet.
The first WAP phones only had CSD, and it was the 9.6Kb/sec speed that drove the creation of WAP itself: a desperate attempt to create a usable experience over such slow connections. But even the mono graphics and text-menu content was painfully slow to use, and starkly contrasted with TV advertising in the UK, from Genie Internet, promoting the Mobile Internet.
Source: The Register
T-Mobile Announcement - "Changes to internet access on your phone"
I remember the old days of WAP, but I'm not going to miss it! Too slow.
How about you? Will you miss it? Will it cause you some issue if you don't have any Data access package?
Edited by tsutton, 12 June 2008 - 02:38 PM.