Only the WiFi models go on sale this Saturday
There are two planned models of the iPad - WiFi-only models, and a WiFi plus 3G models. The WiFi-only models go on sale this Saturday, while the models that allow connection through AT&T's 3G cellular network are planned to go on sale later this month.
Shoppers who wait until the end of April to purchase the 3G cellular-enabled devices will have two options from AT&T for data plans: 250 megabytes of data for $14.99 a month, or unlimited data for $30 a month. The plans require no contract.