It's been said a lot, probably noisy every HTC One S. Try it. With someone calls in a quiet area is best at home, let the other person who is also in a quiet area set the radio or TV quietly or he should speak softly, the connection is as if dead, the TV or Radio not fortuitous because only from a certain level turns the speaker on the HTC when then speak normally is a constant noise during the talk, if nothing is said no background sounds are also heard, similar to the radio. Too bad, because the processing is great, but what's the noisfilter HTC is not installed, the yellow of the egg. I now keep the HTC and will get along with the noise, because the rest of the phone is great. Battery lasts very long, at normater use two to three days.