I have and sell the 8700c and I have not heard any issues with the noise cancellation properties. Could be a couple of faulty devices (every carrier has those). However, it is truly a great machine. It runs like a horse, but more like a short winded horse as the battery doesnt last as long as its counterparts. If you visit this site,
www.phonescoop.com, you will learn a lot of great facts and reviews. Personally, I cannot recommend the 8700c enough. However, like the othe members above posted, try it and see if you like it.