They work great for me and my Nokia smartphones I've had over the years(2910,6682,E51,E71x), good loud volume, good clear sound quality, long talk time, comfortable fit. The various beeps it makes while operating give one a clear indication of what it is doing. The three sizes of earbuds that are available(seperately)give one a choice of comfort and external sound awareness if your ears are small, medium or large. Much less expensive than the ones at the local ATT store ($140 & up for some, geez!) This will be my third and fourth units of this series. The first one I lost, The second the power connector center-pin popped off and went flying after about 6mo. Tried to disassemble it to fix it, but no success there. I hope the vendor doesnt run out of these anytime soon even though this is a discontinued model. The fourth unit I intend to give to my wife for her iPhone. I'll let you know how she likes it after she's had it awhile. Yep, she likes it, but she keeps losing the detachable rubber earpiece in her purses! LOL! Good thing I bought extra ones.