At first saying there's nothing wrong, after some more "informal" testing, they've experienced iPhone 4 signal problems. It appears their labs have strong cell coverage, but things apparently change outside of town.
http://blogs.consumerreports.org/el...s-results-experiences-consumer-reports-s.html
While in my home, I held the iPhone in my left hand, gripping it with normal pressure. My palm covered a gap between parts of the metal band that forms the outer ring of the iPhone and serves as its antenna. As I did so, I moved my pinky finger to the corresponding gap on the other side.
Almost immediately, the signal strength began to drop in the meter from the original three or four barsdepending on my location within the houseto zero bars. The drop took about 5 seconds.
.And when I initiated a series of calls to editor Paul Reynolds, and then placed my pinky over the gap in the iPhone 4's band as I continued speaking, the calls consistently deteriorated. Paul first heard my voice breaking up, followed by static and the dropping of the call; again, the elapsed time from the placing of the pinky to the call being dropped was about 5 seconds
http://blogs.consumerreports.org/el...s-results-experiences-consumer-reports-s.html