Wall Street has wondered for some time how profitable the Apple (NASDAQ: AAPL) iPhone is. First, numbers of analysts pulled the device apart and found out what each component cost. That probably gave a good sense of how much the margin was on the hardware.

But, there has always been a sense the Apple was making a great deal from AT&T (NYSE: T). This was based on the idea the the phone company gave Apple a bit of its service plan revenue in exchange for have an exclusive right to sell the phone in the U.S.....

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