(Update with AT&T correction) The option of a contract-free iPhone 4 in the US has vanished from the Apple and AT&T websites, reports observe. It was previously possible to buy a 16GB phone for $599, or a 32GB model for $699. In an FAQ, however, Apple now states that all US iPhones require a two-year AT&T contract, which does at least lower the hardware price. No explanation has been given for the change.
