"Consumer Reports does not print outside advertising, accept free product samples, or permit the commercial use of its reviews for selling products. Its publisher states that this policy allows the magazine to 'maintain our independence and impartiality... [so that] CU has no agenda other than the interests of consumers.'
"Consumer Reports states that all tested products are purchased at retail prices by its staff, that no free samples are accepted from manufacturers, and that this avoids the possibility of bias from bribery or from being given "better than average" samples."
Moreover, even if you read the magazine and see the negative recommendation, I doubt you wouldn't buy the iPhone just because of that.