AT&T Mobility said it expects iPhone subsidies to dilute its earnings per share by 10 cents to 12 cents through the end of next year. The carrier said things will then turn around in 2010.

AT&T said unlimited iPhone 3G data plans for consumers will be available for $30 a month, in addition to voice plans starting at $40 a month. Business users will pay $45 per month for data, in addition to a voice plan.