In an unprecedented turn of events Consumer Reports came back on on their initial decision of not recommending an iPhone, recommending it but with the use of a bumper. How much Apple paid for that is probably a thing we'll never find out.
It has already been reported that not even the bumper case can alleviate the reception issue! Check the video below and notice how iPhone 4 loses all it's bars even with the "magical" bumper case on. Even if the bumper would provide a fix, the fact that it's not built in is completely wrong!