Apple Corporation CEO Steve Jobs speaks about enhanced language support during his keynote speech at the Apple Worldwide Developers Conference in San Francisco, California June 9, 2008. REUTERS/Kimberly White

NEW YORK (Reuters) - U.S. consumers who want the new iPhone but cannot or do not want to sign up for a two-year contract with AT&T Inc will eventually be able to buy it for an extra $400.

Apple Inc has said the new iPhone will go on sale July 11 at $199 for the model with 8 gigabytes of storage and $299 for the 16-gigabyte version. These prices apply to customers signing up for a two-year AT&T contract.

Those who don’t want to be locked into such a contract, or do not have adequate credit, can buy the iPhone for $599 or $699 as long as they sign up for some kind of AT&T wireless subscription, AT&T said on Tuesday.

An AT&T spokesman could not yet say when that option would become available.