AT&T plans to offer a new iPhone plan designed for the deaf and hard of hearing. The TAP (Text Accessibility Plan) will run $40 a month. It gets you unlimited data and visual voice mail along with unlimited text messaging. Voice calls will cost 40 cents a minute and a two-year contract is required. Customers who want the plan will have to fill out a forms that verify of a hearing impairment from a health care professional, a speech or language therapist or a nonprofit group working in the area of disabilities.